Top 37 How Did Dr Halsey Lose Her Arm Trust The Answer

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Spartan Sarah Palmer was tasked with assassinating Halsey, and when she was close enough to take a shot another fireteam (I don’t remember their names) moved in to save Halsey. Palmer took the shot, but only hit Halsey’s arm. Jul M’Dama amputated her arm to save her life (so as not to lose too much blood).After Requiem is destroyed, Halsey is seen aboard ‘Mdama’s ship with her left arm amputated. Believing that both Palmer and Fireteam Majestic were sent to assassinate her, she offers to assist Jul ‘Mdama in exchange for revenge against the UNSC.Buy the new Halo 5: Guardians Xbox One 1TB Limited Edition Bundle here! At the end of Spartan Ops season 1, Halsey looks down at her severed arm when she tells ‘Mdama that she wants revenge.

Dr. Catherine Halsey
IQ	Genius
Temperament	Melancholic
Other
Religion	Atheistic

Contents

How does Halsey lose her arm Halo?

After Requiem is destroyed, Halsey is seen aboard ‘Mdama’s ship with her left arm amputated. Believing that both Palmer and Fireteam Majestic were sent to assassinate her, she offers to assist Jul ‘Mdama in exchange for revenge against the UNSC.

In what game did Halsey lose her arm?

Buy the new Halo 5: Guardians Xbox One 1TB Limited Edition Bundle here! At the end of Spartan Ops season 1, Halsey looks down at her severed arm when she tells ‘Mdama that she wants revenge.

Does Dr Halsey have a child Halo?

This data made Halsey more resolute in her conviction that nobody involved had any choice but to forge the Spartans. Five days later, she gave birth to her daughter, Miranda.

What is Dr Halsey’s IQ?

Dr. Catherine Halsey
IQ	Genius
Temperament	Melancholic
Other
Religion	Atheistic

Who is the strongest Spartan in Halo?

Halo: Ranking The 12 Strongest Spartans (That Aren’t Master Chief…

8 Buck.
7 Jerome-092.
6 Kelly-087.
5 Kurt-051.
4 Frederic-104.
3 Spartan-B312 (Noble 6)
2 Linda-058.
1 Samuel-034.

What did Dr Halsey do to Master Chief?

In the original Halo timeline, John-117 was born on the troubled colony world of Eridanus II. He was abducted by Dr. Catherine Halsey when he was just six years old, replaced by a flash-clone who died within six months, leaving his parents convinced he was dead.

Is Miranda Keyes Halsey’s daughter?

nothing else matters.” Commander Miranda Keyes, born Miranda Halsey (service number 15972-19891-MK), was the daughter of the late Captain Jacob Keyes and Doctor Catherine Halsey.

Who interrogated Dr Halsey?

Catherine Halsey is interrogated deep within a secret ONI facility. Prologue is the opening cutscene of Halo 4, which shows Dr. Halsey being interrogated by a shadowy figure about the SPARTAN-II program, specifically John-117.

Does Dr Halsey Love Master Chief?

Halsey loves Master Chief, but not romantically. Dr. Halsey loves him like a child, so so does Cortana. So Cortana tried to protect him from whatever she’s planning to do in Halo 5.

Is Halsey Miranda Keys mom?

Halsey that revealed she was Miranda Keyes’ mother. According to these notes, Miranda was born in 2525 and was originally raised by her mother.

Is Dr. Halsey a good guy in Halo?

The Insurrectionist movement was already a core part of the franchise’s lore, but Halo has provided a reason for it; Dr. Catherine Halsey was always unethical, even kidnapping children to transform them into supersoldiers, and her ruthlessness has simply been taken one step further.

How did Halsey meet Alev Aydin?

In other words, Halsey first met Alev while working on her biopic and, since then, they’ve grown from colleagues to friends to lovers and now Halsey is pregnant with Alev’s child.

Why did Cortana turn evil?

For those not in the know, Cortana is well past the age an AI should be, and she now suffers from Rampancy, which has essentially turned her evil. This new Cortana seems based on Dr. Halsey — just like the original — but it’s the AI effectively in her infancy.

Do we ever see Master Chief’s face?

Paramount’s Halo adaptation finally got its debut yesterday, having been stuck in production for what seems like forever. And, in the very first episode, the face of Master Chief was revealed.

Is Halsey a Cortana?

According to her backstory, Cortana was constructed from the cloned brain of Dr. Catherine Elizabeth Halsey, the creator of the SPARTAN-II supersoldier project; Halsey’s synapses became the basis for Cortana’s processors.

How many Spartan 2s are left?

Halo Wars’ timeline mentions that a total of 25 out of 28 surviving SPARTAN-IIs were present at Reach. The three absent SPARTAN-IIs are the members of Gray Team. This timeline also confirms that five SPARTAN-IIs were no longer in active duty since the augmentation of the SPARTAN-IIs.

Who was Halsey having a baby with?

Halsey is looking back at their first year as a mother ahead of 2022. The singer, 27, posted a series of photos to Instagram Friday from the past year, giving a new glimpse at their pregnancy and their five-month-old baby, Ender, whom they welcomed with boyfriend Alev Aydin in July.

How did Halsey choose her name?

She played numerous acoustic shows in different cities under various stage names. She chose “Halsey” as her moniker because it is an anagram of her real name as well as a street in Brooklyn where she spent a lot of time as a teenager.

What happened Jul Mdama?

‘Mdama was eventually killed by Spartan Locke during the Battle of Kamchatka. The rest of his Covenant faction was destroyed shortly after during the Battle of Sunaion, having lasted for five years.

How Doctor Halsey Lost Her Arm

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Table of Contents:

Catherine Halsey

Biographical information

Physical and combat information

Chronological and political information

Real world information

Contents

Biography

Personality

Trivia

Gallery

Appearances

References

Sources

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Most searched keywords: Whether you are looking for Halo 5: Why Catherine Halsey Should Be the Main Villain | Den of Geek Updating Dr. Catherine Halsey is one of the most enigmatic characters in the Halo series. Could she be the villain of Halo 5?
Table of Contents:

As ally to Jul ‘Mdama

Her connection to Master Chief

Her connection to Cortana

As opponent to ONI specifically

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Halo 5: Why Catherine Halsey Should Be the Main Villain

At the end of Spartan Ops season 1, Halsey looks down at her severed arm when she tells ‘Mdama that she wants revenge. Halsey could continue to seek revenge on Sarah Palmer and the Spartan-IV program, with which she always had a relationship of mutual resentment. As an opponent to the UNSC, she would be an opponent to the Spartans and troops like Thomas Lasky, whom fans got to know in Halo 4. In the current run of Escalation, Halsey is still critical of the UNSC’s actions.

More on what that opposition would mean later, but there are other, more personal connections which could make Halsey a powerful, intriguing antagonist in Halo 5.

Her connection to Master Chief

Halsey’s continued alliance with the Covenant extremists could put her in direct conflict with Master Chief, who seems to find the aggressive aliens everywhere. This would be unlike any fight he has experienced before, since Halsey knew the Master Chief as a child. Their relationship during early Spartan training has never been explored in a game, but Halsey still clearly cares about John, as shown by her interest in his name in Halo 4.

She can’t match him on physical terms, but she knows more about the Spartans’ psychology and physical makeup than anyone else. Her enmity would force John to fight a mental battle with the person who knows the most about him. Halsey could become even more of a mastermind figure than she already was, in direct opposition to the player.

The invisible story of Halo is the story of Halsey’s success. Master Chief saved the galaxy because Halsey had augmented him.

John has been given easier struggles compared to ONI’s secrecy in the Halo novels and Halsey’s tentative alliance with ‘Mdama. His missions are clear-cut, black and white: against the ravenous Flood, against the destructive Covenant, against the power-hungry Didact. He has not yet had to encounter the fact that the Office of Naval Intelligence took Halsey prisoner and supplied weapons to Covenant terrorists.

Catherine Halsey

“For a long time I had thought that we had to sacrifice a few for the good of the entire human race. I have killed and maimed and caused a great deal of suffering to many people—all in the name of self-preservation. But now I’m not sure that philosophy has worked out too well. I should have been trying to save every single human life—no matter what it cost.” — Catherine Halsey to John-117 regarding her changed views.[6]
Doctor Catherine Elizabeth Halsey, (Civilian Consultant 409871, phonetically identified as “Charlie Hotel”),[7] is a key scientific adviser of the Office of Naval Intelligence, best known for her work with the SPARTAN-II program, developing and creating smart AIs such as Cortana, and for overseeing the development of the MJOLNIR Powered Assault Armor. She served as a scientific adviser for ONI from 2515 to 2522, when she was made chief scientist,[8] a position she held until the end of the Human-Covenant War.[9]
Halsey held considerable authority within ONI, despite being a civilian, and commanded respect from important military figures.[10] Though generally well-regarded among her peers, she endured intense personal guilt for condemning the Spartans to the life of a super soldier. After the Covenant War, Dr. Halsey was stripped of her position, incarcerated, and treated as a war criminal by the UNSC at large, which led to her apparent defection to Jul ‘Mdama’s reformed Covenant.[11] After almost a year among the enemy, she was recaptured by the UNSC and commissioned to work on urgent scientific matters, particularly concerning the rise of the Guardians.[12]
Biography [ edit ]
Early life and education [ edit ]
“The Office of Naval Intelligence had apparently had their eye on me for years and knew that the only way to convince me to join them was to get me to convince me. It worked. I joined.” — Catherine Halsey recalls her recruitment by ONI in her journal.[13] [14] This self-portrait was sketched by Halsey at the age of eighteen, just a few months after she began her work on Reach.

Catherine Elizabeth Halsey was born on March 19, 2492 within the colony of Endymion’s coastal city of Port Vernon.[1] While an impressionable young child, her father recited to her every adventurous tale of L. Frank Baum’s Oz.[15] At this age, she was already contemplating ideas having to do with artificial intelligences and their longevity.[15] As an adolescent, she was already smarter than her parents and was continually reading, learning, and talking, being eager to share her knowledge with anyone who would listen.[16] Among the works Halsey read was an English translation of Dante’s Inferno.[17] The first game of chess Catherine that played with her mother was the only one she ever lost to her.[18] Upon beating her daughter she had said, in Italian, “When the game is over, the king and pawn go into the same box.”[18] At a young age, Halsey was sent to the elite academy Endymion Gifted, where she continued to defy educatory standards. She was eventually afforded a trip to Circumstance in 2501 from the Dean of Biological Science at Koletre-Browning University, who completely funded her education until the completion of her second doctoral thesis sometime after her fifteenth birthday in 2507.[1] While working on that second thesis, Halsey learned various line commands, long discarded and forgotten due to their archaic nature, with which she could interact with computer programs.[19]
In 2507, while still a doctoral candidate, Halsey met Doctor Elias Carver at an academic social mixer and couldn’t resist correcting his obsolete algorithm implementation when she heard him describing the matrix mechanics of the socio-economic and politico-economic vectors of human expansion.[13] She outlined a corrective matrix calculation to him which revised his dimensional parameters so that the sixteen dimensions were used rather than seven. Doctor Carver did not appreciate being challenged by someone he saw as a young upstart, but her words seemingly caused Captain Michael Stanforth of the United Nations Space Command’s Office of Naval Intelligence to take note of her. Three weeks later, a grant she had proposed for using artificial intelligences to control N-dimensional matrices was green-lit by the UNSC, with its funding contingent on the successful testing of a model of its choosing. Naturally, it was Carver’s model which she was directed to test. Halsey knew his flawed model would produce flawed results, so she ran her sixteen dimensional variant as a control in addition to his seven-dimensional version. Carver’s model predicted a breakdown of social order in the Outer Colonies within twenty years unless strict governmental control was established, reinforced by an immediate and permanent military presence. Catherine ran more than fourteen hundred simulations during this time, varying every parameter, and even in the best-case scenario it was clear to her that the Outer Colonies at large would rebel against the Unified Earth Government soon. She determined that at a minimum, the resulting conflict would lead to thirty years of war and the deaths of five billion people. The maximum effect was unbounded and could involve interminable war and a new Dark Age for humanity. Halsey took her findings to Stanforth only to learn that ONI had already reached the same conclusion. The agency had been keeping an eye on her for years and it had been decided that in order to recruit her, she would need to convince herself that working with the agency was necessary to save the human race.[13] Ysionris Jeromi, who considered Halsey his star pupil at the time, discouraged her from working with ONI.[5] Halsey, however, had no problem admitting that ONI’s tactic had worked on her.[13] She allowed herself to be recruited in 2508 and in early 2510 she was brought to the Inner Colony of Reach and contracted to work as a civilian consultant on a number of classified projects.[1][14][20]
Spartan origins [ edit ]
“There is an ancient saying, “The beginning of wisdom is ignorance.” So where do we begin to create the ultimate warrior? With innocence.” — Halsey, writing in her journal, appropriates a maxim oft attributed to Socrates for her own ends.[21]
After arriving at Reach, Doctor Halsey spent a few months setting up the new laboratory afforded to her.[14] For weeks prior to August 8, 2510 she found it impossible to concentrate due to the confluence of new insurgent reports, new ideas, and the constant supervision of ONI. At one point during this time she stopped at a local shop while coming from the main base where she was stationed and purchased a cup of coffee and a journal in which she could record her thoughts and research notes without having to fear them being read by anyone in ONI. By August 8, the day on which she recorded her first entry in this journal, she had begun to undertake a project she had been simultaneously dreading, desiring, and being inspired by. By this point Catherine had already designed a number of intrusion algorithms that could be employed to bypass artificial intelligence-enhanced data recording and storage systems.[14] By December 4 of that year Halsey’s new lab was still unstaffed apart from herself and racks of A.I. matrices and optical routers which were yet to be removed from their sealed crates.[13] While sitting in the lab on this date Halsey endeavored to create her second entry in her journal, recalling the series of events which had led her to Reach and to be working for ONI. She ended the entry by asking how many lives would need to be spent to save all humanity and whether any price was too high to pay in order to ensure its security, resuming her work thereafter. Evidently to aid in this endeavor, she also made herself a reminder to acquire more dark coffee.[13] On February 15, 2511, Doctor Halsey in her journal went over details of the ORION Project and recorded ways in which she believed its successor could improve on what it had accomplished.[22] [1] At just twenty-two or twenty-three years old, Halsey became the youngest scientific advisor in ONI’s history in 2515.

ORION had been designed to create a nontraditional force of soldiers in order to remove the budding dissident leadership in the Outer Colonies without massive carnage, and to this end volunteers were recruited from the UNSC’s Special Forces. Based on the failures documented surrounding the genetic augmentation and immunosuppressant administration provided to ORION candidates, Halsey determined that the most suitable candidates for a future generation of augmented warriors would need to be prepubescent and possess more malleable and robust DNA structures and repair enzymes. In order to locate individuals with the improbable genetic criteria required, she calculated that thirty-nine billion DNA records would need to be screened. Halsey realized the Colonial Administration Authority’s Outer Colony vaccination program possessed the largest DNA database at that time and resolved to recalibrate her selection criteria to find markers which would expedite the sifting process. Additionally, she recognized that in order to mitigate the posttraumatic stress disorder and sympathy for the insurgents exhibited by many from ORION, total indoctrination would be required. She was opposed to the sort of brainwashing several of her counterparts in the intelligence community had suggested, noting instead that the mission of “Generation-II ORION” demanded at least a decade of training, persuasion and acclimation. Above all, she wrote, absolute control must be maintained over those chosen. It was clear to Halsey, based on these parameters, that children were ideal for this project. The ethical and moral implications of such an idea forced her to take extra time to think about this, however. Illustrations drawn in her journal on this date outlined her considerations of various human augmentations suitable for the next generation of the ORION Project, which she also was considering renaming something more inspirational on behalf of her military counterparts.[22] Just over a week later, on February 23, Halsey read the news about a nuclear terror attack at the Haven arcology on Mamore which left two million dead and millions more expected to die from the fallout.[23] It was reported that the Freedom and Liberation Party was claiming responsibility and upon learning this Halsey became even more convinced than she already had been that she had to stop the violence in the Outer Colonies from escalating further.[23]
On July 30, 2511 Halsey received test results for a new polymerized lithium niobocene.[24] The material had been developed for discharging the vast amount of static energy that plagued ships in slipstream space but Halsey was interested in its potential applications as a sheath or suit of artificial muscle for a Gen-II ORION soldier. Though manufacturing an entire suit with it was cost-prohibitive at that point, Halsey mentioned in her journal on this date that Stanforth, now a vice admiral and the head of ONI Section Three, had assured her this would be addressed in the “production phase” of the project.[24][25] Given the scope, Halsey remained doubtful.[24] Additionally, although she believed there was a way to couple the polymerized lithium niobocene to a wearer’s nerve inductions to increase reaction time and had created notes on the subject and stored them within the A.I. Jorjet, she had yet to solve the matter of the energy required for such a design. She’d concluded a small nuclear or fusion reactor would need to be attached to the suit, which would be unwieldy, dangerous, and expensive.[24] Halsey and others agreed that the concept behind the Navy’s original Mark I prototype powered exoskeletons needed to be scrapped for Project: MJOLNIR.[24][26] Needing to be plugged into a generator or to rely on broadcast power made them wholly inefficient for battlefield use.[26] Looking over the Mark I’s antiquated design at this time, Halsey still wondered how much of it could remain useful.[24]
On September 8, 2511 Halsey recorded in her journal that she had recently finalized the control parameters for a Fast Fourier transform X-ray 3D scan for mapping a brain’s ionic density patterns that indicate individual links.[27] This meant that a deep stimulating scan could then cultivate growth linkages in a cloned brain, thereby allowing memories to be transferred for the first time. Complete human clones could feasibly now be produced that were indistinguishable from the individual they were based on. The potential application of this breakthrough for ORION-II was obvious, and Halsey was of the mind that stealing children away and replacing them with clones would mean there would be no going back. By the time she updated her journal with this, she had already informed the vice admiral that they were ready to initiate the next phase of the project: candidate procurement. She had done this knowing that only a small fraction of the clones they produced could be expected to live a normal lifespan due to the amount of DNA base-pair errors rapid flash cloning of large volumes of tissue produced. Beyond what this breakthrough meant for her current project, Halsey also speculated on whether this technique could imprint the next-generation of artificial intelligences and in so doing avoid the wavefunction collapse that had plagued the functionality of previous generations.[27]
On June 19, 2513, Doctor Halsey settled on a new name for the project.[21][28] Stanforth had seemed to hint that rechristening the project would serve to distance it from the failures of ORION.[21] After having Jorjet and Déjà (an A.I. created to assist her with the program) give her a refresher on military history which produced a number of contenders, she decided “SPARTAN” best represented the project’s aims.[21][29] The Spartans of Ancient Greece had been known for their legendary training of young boys and eugenic customs, and the defense of Greece made at Thermopylae was a well-known and cherished tale within the military community.[21] Coincidentally, Halsey did not fail to note, her project had originally been funded for three hundred candidates. In order to honor the sacrifices made by the men and women of the original ORION effort, she opted to call the project “SPARTAN-II”, preserving its status as the second iteration of that first effort.[21] In 2515, Halsey was officially named a scientific advisor for ONI.[1]
Catherine Halsey: “We screen these subjects for certain genetic markers. Strength, agility, even predispositions for aggression and intellect. But we couldn’t remote test for everything. We don’t test for luck.” Jacob Keyes: “Luck? You believe in luck, Doctor?” Catherine Halsey: “Of course not. But we have one hundred and fifty test subjects to consider, and facilities and funding for only half that number. It’s a simple mathematical elimination, Lieutenant. That child was one of the lucky ones—either that or he is extraordinarily fast. Either way, he’s in.” — Doctor Halsey defends her peculiar means of testing John.[30] [25] It only took one brief encounter between Halsey and Keyes as they both came out of cryostasis for her to crystallize their roles and the rules of conduct, making him understand she was in charge despite being a civilian

By July 21, 2517, Halsey had been provided with her own team, to which she delegated much of the responsibly for screening Outer Colonies candidates for SPARTAN-II.[31] She did this so it might be completed within a reasonable time frame and so that she could personally focus on processing those from a single region of space: Sector 4.[31] The children from this sector which met the criteria Halsey had identified in her original study had files assembled personally by her.[30] In total, one hundred and fifty subjects were to be considered. The Spartan-II program, of which Halsey was the chief scientist and administrative overseer, had only been granted facilities and funding for half that number, however, so only seventy-five would ultimately be selected.[30][32] And even then, an ONI representative reminded Halsey that not all would make it through the augmentation procedures when the time came for that.[33] Vice Admiral Stanforth had agreed to lend Halsey a Vancouver-class courier called the Han, provided that she agreed to at least one naval officer accompanying her.[25] Halsey was given free reign to choose her attaché and after reading through the file of one Lieutenant Junior Grade Jacob Keyes, she requested him based on his demonstrated ability to keep a secret. Keyes was then, without any explanation provided to him as to why, assigned to pilot the Han, protect the doctor, and otherwise stay out of her way.[25][31] On July 21 Halsey wrote in her journal that she was considering recommending him for permanent reassignment to her staff.[31] The Han also came with its own dedicated artificial intelligence by the name of Toran.[31]
Halsey was awakened from cryostasis alongside Keyes shortly after 0430 hours on August 17 while the Han was still in slipspace but set to emerge soon in the Eridanus system.[25] Giving not so much as an acknowledgement that they were both naked, Halsey simply climbed out of her tube and told the lieutenant to get cleaned up and dressed as she headed for the showers herself, making it clear to Keyes that she was in charge. Halsey was already strapped into the navigator’s couch and on the bridge and tapping in commands across four keypads when he joined her soon thereafter. The doctor welcomed him and asked that he be seated at the communication station to monitor channels when they reentered normal space. She then had Toran provide her with astronavigation maps of the system and asked if any planets between their current position and Eridanus II could be used to pick up a gravitational boost to let them arrive sooner. Additionally, in rapid succession she had the A.I. begin to play Rachmaninov’s Piano Concerto Number Three, begin a preburn warmup cycle for their fusion engines, and halt the rotation of the shuttle’s central carousel section to conserve power. Toran obliged with each request and informed her that they would be exiting slipspace in about five minutes, give or take three minutes. From the way Keyes was glancing at her, Halsey could tell he was impressed at her ability to put Toran through his paces so rigorously, so she asked if he had a question for her. In response he composed himself before inquiring as to the exactly what they were doing. Halsey told him that they were on a reconnaissance mission of sorts, as they were heading to Eridanus II in order to observe a child whom she hoped would only be the first of many. She suggested the junior lieutenant should just think of it as a UNSC-funded psychological study and then sternly told him that was exactly what he was to say it was to anyone who asked. The Han soon decelerated as it dropped out of slipspace near a gas giant and then began a hard burn, accelerating for sixty-seven seconds before arcing away from the planet. As soon as the boost was complete Toran informed the two humans that their ETA was forty-three minutes and three seconds. At this, Halsey unlocked her harness and floated free. Just before they had dropped into normal space, Keyes had started to ask her if she knew how dangerous the Eridanus system was then and now she finally answered him in the affirmative. After stretching and strapping herself back into her couch, she reminded her escort that he was supposed to be monitoring their comms for that very reason. Catherine spent the next thirty minutes with her back to Keyes while she read over reports on her navigation screens. The Keyes eventually spoke up to candidly ask why he was there, and Halsey told him the truth about why she had selected him for the job. She also assured him that though he may have rather been on the UNSC Magellan then, which now-rescinded orders had previously had him rotating to, the child they were traveling to observe could make all the difference for the ongoing struggle against the Insurrection. Once Toran announced they were approaching Eridanus II Halsey had him plot an atmospheric vector for the Luxor spaceport and ordered Keyes to make ready to land.[25] [30] Her own, after all, was already long dead.[30] For a moment after meeting John, Halsey envied the boy’s innocence.Her own, after all, was already long dead.

Halsey and Keyes made their way onto the campus of Elysium City’s Primary Education Facility Number 119 under the guise of parents inspecting the school for their little girl.[30] By 1130 hours they were watching children at play from the semi-shade of a canvas awning. Halsey, wearing a sundress and straw hat, urged the lieutenant to appear more relaxed and even tried to help by slipping her arm through his, but her efforts were in vain. It was Keyes, however, who first identified their subject, a six-year-old boy named John, after Halsey showed an image to him. John was atop a grassy hill at the end of the school’s playground, engaged in a particularly vicious game of king of the hill. Halsey’s first instinct was to point her data pad at the boy to record the incident for later study. After glancing around to see that the only other adult present was marching an injured girl toward the nurse’s office Halsey ordered Keyes to stay back and keep watch while she walked over to get a closer look at their boy. She stopped at four meters from the base of the hill and asked to speak with John, whom the other boys assumed must be in trouble. She led him to the edge of a nearby sandpit and asked his name, which he freely offered before holding out his hand to be shook. She asked what he was had been doing and John answered that he had been winning. Seeing that the boy was fond of games, she produced a quarter and told him that if he could guess which side of the coin would be facing upwards when it landed after being flipped, he could keep it. She let it go but before it could hit the ground John snatched it out of the air and confidently declared “Eagle!” referring to the side of the quarter which was, indeed, facing up when he opened his hand. Assured he could keep the coin for himself, he asked if they could play again but Halsey told him that had been the only one she had. She told him he ought to go back to his friends and returned to the lieutenant, asking to make sure he had recorded the interaction. He had, and after reviewing the footage Halsey sent it to Toran on the Han. She explained to Keyes that the one thing they couldn’t test their candidates for remotely was luck, further clarifying that she meant her test as a simple way to eliminate half of the qualified children due to the budgetary constraints of the program. She remarked that John whether John was lucky or just extraordinarily fast, he had made the cut. Keyes still did not fully understand her interest in the child and said as much, to which she replied that she hoped he never would fully understand their purpose there.[30]
After similar visits to multiple other children in Sector Four, The Han took them to Dwarka, a harsh world still in the process of being terraformed.[34] The child to be considered there was an orphan by the name of Soren. The report Halsey had previously read indicated the boy had survived on his own for around three months following the deaths of his mother and stepfather. Halsey left Keyes aboard the Han and approached Soren alone at the place he was being cared for by this point. She asked him his name, but admitted she already knew what it was and only wanted to see if he’d be willing to tell her. He had not been, evidently being deeply distrustful of the doctor. A pair of glasses Halsey wore allowed her to review holographic files on the lenses as she spoke to the boy, and as a result of his circumstances she chose to pursue a different strategy. She was as honest with him insofar as she told him she’d come to see him because she wanted to make him stronger, faster, and smarter than he could ever hope to be without her help. She also made sure he understood that if he chose to accept her offer, he would be faced with the hardest experiences he had yet―even harder than what had happened after his parents died. Faced with the choice of leaving with Doctor Halsey or being placed in a foster home, he quickly agreed to go with her. Halsey was able to convince the authorities that she was adopting the boy and bring him aboard the Han. There she showed Keyes the footage she’d recorded of their conversation. The lieutenant was uneasy with her decision to take then child then. Halsey was sure that Soren would be a good fit, however, and defended his acquisition by pointing out at least he had been warned concerning what lay ahead.[34]
Dr. Halsey looks over the profiles of the abducted children.

Halsey and Keyes had returned to Reach by September 10 and it is on this date that Halsey told Déjà to let others know she had settled on the final seventy-five subjects.[35] Halsey was stationed in low Reach orbit when she gave final approval to kidnap the seventy-four which still remained to be acquired. Halsey later recorded a private spoken journal entry, using RED encryption and her private key, in which she voiced how regrettable she felt what she was doing was. She had planned to keep the recording private but changed her mind and just had Déjà erase it entirely once she had finished.[35] On September 15 Halsey, writing in her journal, expressed that every child had exceeded the selection criteria and her own expectations.[36] She was particularly impressed by two: Number 058, a girl named Linda who had engineered her own intelligence network at school to spy on her teachers, and John (Number 117), who had won king of the hill forty-five times in the two weeks before their meeting. Halsey noted that Number 095, a boy by the name of Caleb, had never been located. Later that day Halsey added an addendum to her journal entry after Retrieval team Gamma reported that Number 087, a girl named Kelly, had remarkably eluded capture for six hours before coming forward on her own, having believed her capture attempt to be an elaborate game for her upcoming birthday. Gamma’s report caused Halsey to ensure new retrieval protocols were implemented to prevent similar mistakes in the future.[36] The next day, September 16, Catherine and Jacob Keyes finally parted company after months together.[37] Halsey felt he was beginning to suspect there was more to their incursions than mere field observations so she requested that he be reassigned to the Magellan with a commission to full lieutenant both for his own protection and the protection of the program. Taken with Keyes, she recalled in her journal on this date an occasion which he had gotten a job done himself rather than waiting for the assistance of a technical crew.[33][37] Despite saying their goodbyes on the sixteenth, Halsey and Keyes briefly met once more the following day before parting for good.[38] Once all the children had been collected Déjà undertook a psychological evaluation of each and provided the results and her recommendations to Doctor Halsey.[33] For years after this the doctor kept what she believed was the only set of records concerning the families who had lost children.[17]
Halsey briefs the trainees.

By 2300 hours on September 23 Halsey was standing on a platform at the center of an amphitheater within ONI’s CASTLE Base (where her facilities were), itself located far beneath the planet’s FLEETCOM military complex.[33][39] When Déjà asked if she was ready to speak to the abducted children she told the A.I. she almost was but wished for her to summon Chief Petty Officer Franklin Mendez, the drill instructor who would be overseeing the trainees’ physical training and hand-to-hand combat, to join her first. She directed Mendez to join her on the platform once he entered. Déjà asked the doctor for her thoughts on the candidates’ psychological evaluations and Halsey, while thanking her for their thoroughness, informed her she was forgoing her recommendation to lie to the children. Halsey argued that though the truth had its own risks, lying to the children about the circumstances of their kidnappings or even inducing memory loss could jeopardize the program’s goals. Before Déjà could offer a response Halsey clicked her microphone and gave the command to bring the abductees in. Once all seventy-five were seated, she explained that per Naval Code 45812, they were thereby conscripted into SPARTAN-II. She said that they were to be the UEG’s protectors and promised that here they would become the best they could be. She also informed them that they could not return to their homes or families. She closed by telling them to rest then, since their training would begin the next day. Halsey then instructed CPO Mendez to escort the trainees to their barracks to be fed and put to bed, also advising that they be kept plenty busy the following day in order to keep them from thinking about what had just been done to them.[33] Before all the children could file out of the amphitheater one boy asked Halsey if they were there to stop everyone from fighting and killing each other.[33][40] Before the day was done Halsey noted in her journal that the first phase of the program’s indoctrination was under way and that her team of ONI child psychologists was assuring her the children wouldn’t even remember their names or families after just six months under Mendez’ tutelage. Even so, she also wrote that she was working with Déjà to continue indoctrination protocols and the candidates’ education.[40] Before falling asleep Halsey nursed a glass of wine in bed while she viewed reporting on the Insurrection.[35] The news of an escalating death toll reinforced what she was doing to the children and she said as much to Déjà before having the A.I. show her footage of the children being fed.[35] Over the course of the first three days Halsey met regularly to talk with the girl Naomi-010 within CASTLE Base.[39] During one of these sessions, despite having originally intended to avoid lying to the children, Catherine told her that her father wouldn’t be coming to rescue her because he knew she had an important job to do as a Spartan.[39] On the fifth day of training, the children were given haircuts.[41] Halsey took note in her journal that Kelly-087 had clawed at and disarmed the master sergeant barber of his clippers before needing to be pinned down by three other attendants.[41]
On December 24 Doctor Halsey received a batch of after-action reports regarding the fates of the clones used to replace most of the stolen children.[42] Overall, the clones’ longevity had outpaced what laboratory experiments had predicted and Halsey wondered if this could have been owed to the efforts of parents to nurture them back to health. She assigned JACKBOOT to track this further. Writing in her journal, she expressed remorse for her inability to detach herself emotionally from the reports of suffering, death, and grieving.[42] Seeing as the use of cloning for the Spartan program’s purposes violated many legal statutes, Catherine made sure at some point that one of her A.I.s obfuscated her culpability in the budget.[43] Halsey regularly observed the conscripted children from a distance and scribbled notes down during their exercises, with Soren sometimes noticing her watching him in particular.[44][45] By December 10 of 2518, she and CPO Mendez had identified Kurt-051, Jerome-092, Frederic-104, and John-117 as potential leaders for all the trainees. Though Chief Mendez wanted to wager on Kurt, she was confident John would be their leader eventually, something she had been convinced of since the day she’d met him. Halsey was also pleased that they had not yet witnessed the sort of aggressive alpha dominance predicted by ONI’s specialists in any of the children.[46]
Work continues [ edit ]
Halsey and Mendez meet with John.

“I’ve instructed Déjà to emphasize the history of military training—that to simulate combat conditions, lethal force is often employed; that accidents are an inherent risk… perhaps even inevitable. Mendez spoke with the child. She understands. She will recover. This bodes well. There will be many deaths before boot is over.” — Doctor Halsey considers the cost of the Spartan-II training and expresses optimism about the trainees’ psychological hardiness.[47]
One day, around five months into training, Doctor Halsey asked to see two children who had made repeated attempts to escape the program: Jai-006 and Adriana-111.[45] When Chief Mendez brought Jai into her office she at first pretended he had been the one to initiate the visit before casually asking if he wanted to leave. The boy responded enthusiastically that he did, so she asked him to recall what she’d said to them all when they’d first arrived. Nodding regretfully at his clear recollection and persistent defiance, she then drew his attention to a small dart which she claimed could induce a selective neural paralysis and cause him to forget all of his experiences on Reach so far. She said that should he break out of the forest surrounding the complex again, he would be shot in the head with one of these darts and wake up in a city with no memory of what had happened, provided it didn’t do further damage to him. On the other hand, she advised, he could continue his training under people who cared about what happened to him. To contrast his new life with his old, she told him that when the orphanage on Bhuj he’d been housed in was called nobody there had even noticed he’d been missing since she had transferred him. Not even Bhuj’s vendors, she’d claimed, remembered him. She finished by exploiting his blossoming friendship with Adriana and making him understand that she could also make her forget about him. Halsey told him that this was her final offer: if he tried to escape that night what she’d said about erasing memories would come to pass. If he stayed, conversely, she offered him a family and a chance to be remembered. Adriana’s similar meeting with her left the girl in tears later that evening and unwilling to tell Jai what the doctor had said to her.[45]
On July 12, 2519 the trainees were scattered throughout a military wilderness training preserve in the Highland Mountains and left to find their own way to the extraction point, with the stipulation that the last to arrive would have to walk back to the base.[48] John stubbornly refused to accept those parameters and led the children to steal the D96-TCE Albatross from the guards posted at the extraction point and, with help from Déjà, fly them all back.[48] At around 2104 hours Halsey met John and Mendez in the latter’s office, greeting the boy as she seated herself across from the Chief.[4][35][48] Once Mendez had finished questioning John regarding his actions, he looked to Halsey for advice regarding what ought to be done with him.[48] At this, she offered that it was obvious to her he should be made squad leader over the rest.[48] On September 20, 2520, the trainees experienced their first casualty in the form of a handler who was accidentally killed by Carris-137.[47] Catherine saw Carris crying outside the barracks following this but decided to leave her alone. She and Chief Mendez both agreed that no disciplinary action was necessary. Memorial services were held with all candidates in attendance and training resumed thereafter. Halsey had Déjà emphasize to the children that throughout the history of military training lethal force had often been employed and that deaths were an inherent risk. Sure that Carris would recover after speaking with Mendez, Halsey chronicled her thoughts on the matter. She thought the girl’s response boded well, since it seemed certain there would be many more deaths before boot camp was finished.[47]
Halsey smiles at Keyes during their brief romance.

On October 15, 2521, while enjoying a slice of custard pie from Havadi’s, Halsey took the time to muse somewhat in her journal on the vulnerabilities created by the standardization of operating systems, highlighting the recent disabling of a patrolling destroyer by a terrorist who hacked its code.[49] Given that the UNSC, conversely, had not had much success penetrating the homegrown collections of software employed in the Outer Colonies, she concluded that the time had come to think outside the box as far as programming practices were concerned. She had spared no resource in the development of routines that allowed the newly-operational third-generation A.I.s to penetrate any system software. Additionally, they had already learned to mutate and defend established UNSC operating systems from attack, a side effect of the routines which Halsey found serendipitous. Before she concluded writing that day, she took note of the frustration she felt at the way the acronyms for illegal entry protocols and counter-illegal entry protocols had been commonly misspelled and then vocalized based on those misspellings.[49] On June 5, 2522 Halsey was finally offered the position of chief scientist within ONI, after years of only officially serving in an advisory role involving a series of undocumented but well-paid contracts.[49][50] Since she had always lacked the time or interest to spend the money earned, these contracts had always benefited her little. Halsey accepted the offer, but was uncertain why it had been presented to her then. In her journal she theorized that the promotion might have something do to with the curiosity of her colleagues and the wider scientific community or might simply reflect suspicions that her temporary unofficial advisory role was in reality none of those things.[49] Once around this time, when Soren-066 was nearly eleven years old, she approached him as he ran through an exercise with the other children.[44] Soren had been hesitating, unsure of which team to join, so she asked if everything was alright. The boy replied in the affirmative, but slipped up and called her “Sir” before blushing and correcting his mistake. Halsey just smiled and told him he shouldn’t get distracted by irrelevant data, then pointed past him as both teams ran for the skirmish ground and added that above all he shouldn’t let himself get left behind.[44]
On January 18, 2524 CFHT-Mars captured a ten-minute exposure image of an anomalous object within the star cluster NGC 2244 and nearing human space.[51][52] An acquaintance of Halsey’s later sent her the image for evaluation along with a note describing the unidentified object as having guided movement and not belonging to the UNSC.[51][52] They also gave her a way to reach them on ChatterNet, should she wish to weigh in on this mystery.[51] August 22, 2524 left Halsey furious after she learned that her candidates had been rerouted during a training exercise to a Special Forces camp on the other side of Reach.[49] Mendez had told her that “interested parties” within ONI wished to observe the teens in action firsthand, which made her immediately wonder about someone trying to usurp her project or cut its budget. She took her grievances to Admiral Stanforth, who claimed to know nothing about what had happened and told her to stop being paranoid. Convinced he was not being truthful and that something was going on without her knowledge, she requested that the production of the next-generation A.I. matrix strata be expedited so her new intrusion and counter-intrusion software could be developed to aid the Spartans and protect herself.[49] On November 17 of that same year, Catherine made an entry in her journal following a conference she had attended at the University of Calippus.[49] While at the conference, she had reunited with Jacob Keyes and had sex with him.[1][49][53] She was unsure whether her decision to do so had been a result of the dizzying pressure she was under, a response to a chance encounter with a kindred spirit in a strange place, or something else, but she was glad it had been him she’d run into.[49] The romantic liaison with Keyes left her pregnant with a daughter.[1]
ASTER [ edit ]
Dr. Halsey looking at a holographic display detailing which Spartans did not surviver their augmentations.

Catherine Halsey: “I have doubts, Déjà. I thought the reasons so compelling when we first started Project: SPARTAN. Now? I… I just don’t know.” Déjà: “I have been over the ONI projections of Outer Colony stability three times, Doctor. Their conclusion is correct: massive rebellion within twenty years unless drastic military action is taken. And you know the ‘drastic military action’ the brass would like. The Spartans are our only option to avoid overwhelming civilian losses. They will be the perfect pinpoint strike force. They can prevent a civil war.” Catherine Halsey: “Only if they survive to fulfill that mission. We should delay the procedures. More research needs to be done. We could use the time to work on MJOLNIR. We need time to—” Déjà: “There is another reason to proceed expeditiously. Although I am loath to bring this to your attention, I must. If the Office of Naval Intelligence detects a delay in their prize project, you will likely be replaced by someone who harbors… fewer doubts. And regrettably for the children, most likely someone less qualified.” — Halsey shares her concerns with Déjà.[5]
On February 23, 2525 Halsey got a chance to have a long chat with John during which, to her surprise, she learned he was convinced the Spartans were to enter a new, more severe phase of training.[54] Writing in her journal, she expressed her desire to share everything she could concerning the upcoming augmentations and wondered if any of them would refuse were she to offer them the choice of whether or not to proceed. Déjà had continued to update and run Catherine’s revision of Elias Carver’s model weekly by this point, and the results were only growing worse. This data made Halsey more resolute in her conviction that nobody involved had any choice but to forge the Spartans.[54] Five days later, she gave birth to her daughter, Miranda.[55] Near the end of February Halsey and the rest of her team sent their prototype suit of Mjolnir armor to Naval Special Weapons for evaluation.[56]
As the day for the Spartans’ surgeries drew near, Catherine eventually summoned Soren to speak with her in her office.[57] The fourteen-year-old boy could tell that she was overworked and not getting enough sleep and even after she instructed him to sit she continued to scan through electronic files while whispering silently to herself. When she was finally ready to talk she asked Soren if he could remember the day they’d met on Dwarka and inquired as to his thoughts on the choice he’d made to join the Spartan program. He confirmed he was glad he chose the way he did, but Halsey shared that she had wondered whether it was right to lay such a burden on him at that age. Brushing the issue aside, she then let him now she’d asked for him then because she wished to give him another choice. She went on to explain the next step she had planned for he and the others: their physical augmentation. Halsey did not shy away from telling Soren the risks the necessary operations and therapies posed. When he asked why she had singled out him alone to give the choice of moving forward in this way to, she claimed that he was essentially to function as the control group of the experiment but still could not say why he specifically had been chosen for this. After she had secured his consent the boy left and Halsey asked Déjà if she’d been listening and what her thoughts were on the matter. The A.I. pointed out that Halsey had misrepresented what a control group actually is and that she hadn’t quite told him everything about the upcoming ordeal. In addition, she said she could tell that Halsey’s purported justification for the reveal was spurious and it seemed to her more likely that the doctor was only trying to ease her conscience. Halsey could not disagree, dismissing Déjà to be alone with her thoughts.[57]
On March 9, the day before Project: ASTER was to be initiated, Halsey and the seventy-five teens could be found aboard Medical Facility Endurance in orbit over Reach.[5] At 1130 hours the doctor was pacing in the observation room while she waited for Déjà to decrypt a transmission from Vice Admiral Ysionris Jeromi. Catherine had previously proposed a hypothetical series of experiments involving bonobos to he and his team in order to obfuscate her true intentions for the protocols. To her dismay, the latest from Jeromi informed her that further analysis had failed to yield viable alternatives that might mitigate any of the risks inherent to her “hypothetical” experimentation. As soon as she was finished with the file he’d sent Halsey erased all traces of it and even sent Déjà to track its pathways all the way back to the UNSC Hopeful to destroy his related notes and files. Given the news, Halsey seriously considered delaying the procedures and only put such thoughts aside due to Déjà pointing out that ONI would only find someone else to move the project forward if she started dragging her feet. Chief Mendez met the doctor in the hall outside the observation room and at her insistence followed her up the stairs to the hospital’s pre-op wing. Upon seeing John in Room 117 she forced a smile and asked how he was feeling. John, thinking of the procedures as just another exercise, asked her if she could just this once tell him how to win. To that, she could only lean in close and tell him he needed to survive.[5] Later that day Halsey divided the various augmentations into two groups according to their risks of failure or long-term side effects not adequately studied.[58] Those that she considered to have unacceptable fail rates were to be tabled for then in order that further research could be done. Already she had begun to quietly arrange long-term studies on the gradual application of cyclo-synthetic neural transmission gene sequences during subjects’ early lives and noted in her journal that research on the injection of viral microphages at neuron surfaces was pending. Halsey closed that day’s journal wishing there was a god to pray to.[58] As she was being readied for the procedures within Lab 7, Halsey visited the girl Yasmine and assisted a nurse in strapping her down.[59][60] She attempted to reassure the girl that she would barely feel anything apart from slight pain that accompanies injections.[59][60][Note 1] While visiting Serin-019 before the procedures commenced the girl asked her how different she would feel when she woke up.[61] Halsey was honest with her and let her know just how painful and persistent the side effects of the surgical enhancements would be if she survived—possibly lasting months or even years.[61]
During the augmentation process Soren-066 was returned to the Spartan compound on Reach, where he then woke during the procedures and violently attacked medical staff.[62] The young teen was stopped in a hall beyond the operating room he’d escaped from by CPO Mendez and a line of five or six marines. Out of breath from running, Catherine arrived on the scene just after Soren was hit numerous times with tranquilizer darts, pleading for him not to be hurt. Soren’s last words before collapsing were used to ask Doctor Halsey what she had done to him.[62] When Project: ASTER’s procedures were completed, only thirty-three of the teenagers had ostensibly been augmented successfully.[5] As far as these thirty-three were made aware, twelve others had been injured during the operations so severely that they would be unfit to be Spartans and the remaining thirty had died.[5] The truth, conversely, was that those pronounced dead were in fact cryogenically preserved in the hopes that they could be revived later, and some of those that were crippled would go on to be rehabilitated and join the ranks of Spartan-IIs in the future.[63][64]
Aftermath [ edit ]
“Was the need commensurate with the risk? We had to move quickly. The onset of puberty was the gating factor—that and the pressure from a growing insurgent threat. Must move forward. Find solutions. I’m sure the vice admiral’s ONI trauma experts are reporting that I’m ‘not letting go’. They can all go to hell.” — Halsey relays her thoughts and feelings in her journal following the many failures produced by the augmentation processes.[63]
By March 30 Halsey had joined the forty-five who had unambiguously survived aboard the UNSC Atlas, an Epoch-class heavy carrier heading for the Lambda Serpentis system.[4][5][65] She had told John that some of the side effects he was experiencing which were causing him to be clumsy were actually good, since they were evidence of stronger muscles and faster reflexes.[66] The next day she reflected in her journal on how her training as a scientist had conditioned her to view failure, struggling to reconcile the scientist’s duty to regard all data as useful with the malformations and excruciating deaths visited on her Spartans.[63] She allowed herself to question whether the need to push forward with ASTER had been commensurate with the threat the Insurrection posed. Halsey guessed that Stanforth’s trauma experts would be reporting she was having difficulty “letting go”, but she committed to moving forward and finding solutions for those who might still be saved. To this end the doctor had ordered that no candidate autopsies be performed. The bodies of washouts were cryogenically preserved, pending further study. Her hope was that some, if not all, of them could someday be revived. Closed casket funeral services at midnight the day before, she noted, would help the survivors attain psychological closure. She was uncertain how they might react in the future to the resurrection of their comrades but was certain ONI would find a use for them regardless. Those now afflicted by serious malformations, after all, had already been offered various “desk” duties within ONI. Serin-019 was among those Halsey told the others had died, though in truth she had only been terribly crippled and would be delivered to Earth for ONI to take custody of her.[61][67] Catherine had assigned Déjà to investigate as-yet theoretical therapies for the washouts’ resuscitation. She was particularly interested in the potential of the complete restructuring of bones and attendant nanografts, something she thought could prove especially useful for Kirk-018 and René-081. Even so, she decided she would allow the washouts to adjust to their new jobs for several months before suggesting some of these experimental procedures. By then, she figured, they would be willing to try anything to recover, as she couldn’t imagine them to survive the vigorous indoctrination and training they had to only become passive spectators.[63]
Halsey and Mendez observe John remotely.

The Atlas was patrolling the Lambda Serpentis system by April 22 and it was shortly after 0430 hours on this date that ONI engineered a hostile encounter between John and four orbital drop shock troopers in order to test his capability.[66][68] Halsey observed the encounter in the ship’s gym remotely, cooly remarking upon the boy’s steady heart rate and pulse.[4] John had broken the nose of one ODST when their sergeant intervened to propose that they settle their dispute in a nearby boxing ring.[66] Mendez, watching along with Halsey, questioned the wisdom of what was happening but his hesitation was rebuffed by her.[4] She pointed out that John was only doing what they’d built him to do. As the chief left her to make his way to the gym she simply renewed her interest, wondering what effect the augmentations might have had on his adrenaline.[4] Not long after the Spartans on the Atlas returned to Reach five of them elected to quit the program and escape.[69][70] Daisy-023, Ralph-103, Joseph-122, Oscar-129, and one other boy managed to get ahold of M6C magnums and hold at least seven individuals at gunpoint within a hallway, one of whom was Doctor Halsey. Daisy declared that they were leaving and could not be prevented from doing so. Daisy eventually was able to secure passage offworld and traveled to Sargasso, where she had been born. Unbeknownst to her, she was followed by Halsey. Catherine caught up to the teenage girl outside her old home, having been flown there in an AV-14 Hornet. As Daisy was first laying eyes upon her own clone, Halsey chose to speak to her from the Hornet through a radio in her ear. She explained the rationale behind the production of the clones in 2517 and urged her to return home to Reach. In the end, Daisy, Ralph, and Joseph were brought back into the fold; Oscar and the other boy committed suicide.[69][70]
It was not until early June that Soren, counted among the washouts, awoke from a comatose state.[71] Repeatedly during the three months in which he was out it had been thought he would die and at one point the decision was even made to disconnect life support, but after four minutes of flatlining his heart had then begun to beat anew. Halsey paid him a visit in the brig where he was being held almost immediately after he woke up, flanked by an armed guard of two marines. She greeted the boy before looking him over and dismissing her guards, who were resistant at first but gave in when she claimed rank by virtue of being within a science facility. Halsey apologized for the restraints limiting Soren’s movement and assured him she had argued against them but had been overruled. Following this she sat down on the floor within his reach and he joined her shortly thereafter. When Soren let her know he wasn’t feeling quite right she said the analgesic medications he was on were likely to blame and that others were dealing with varying degrees of pain just like he was. She explained that his body had reacted poorly to the administered muscular enhancement injections and thyroid implant, ultimately resulting in intense musculoskeletal pain that she believed would diminish over time but likely never go away completely. She did note to him, however, that he had become stronger than anyone had imagined the Spartans could be. When Soren asked how many of his brothers and sisters remained, she told him almost half had died. At that she apologized before leaving without a further word a moment later.[71] By June 27 planning was underway for experimental surgery, therapies, and rehabilitations for more than eighty percent of the washouts.[72] Halsey noted in her journal that several of these protocols could take years to complete and that A.I.s were predicting a survival rate of no greater than fifty percent, but she also believed that her Spartans would exceed expectations just as they always had.[72] The day which followed was the doctor’s last official one at Camp Hathcock.[73] FLEETCOM had offered her a corner suite in the Olympic Tower in New Alexandria, but she had turned it down in favor of CASTLE Base, which was to serve as her new home from then on.[73][74] Her funding was shunted to higher profile projects and her access to classified materials was severely restricted around this time.[16] Each morning she became forced to pass through a dozen security checkpoints and submit to a barrage of retina, voice, fingerprint, and brainwave identification scans after descending into the base’s labyrinth to reach her office.[16] On June 30, 2525 Halsey was shocked to learn Naval Special Weapons had approved limited-run production of Mjolnir.[56] She had expected at least another three months to elapse before she got such news. She made a note to herself in her journal so she would be reminded to follow up with her source regarding what had prompted NAVSPECWEP’s prompt decision. One file in the official response Catherine received also contained a partial routing code which she was able to backtrack through NAVSPECWEP’s firewalls. Doing this revealed a volunteer had been put into the prototype suit against an emphatic warning she had made about the armor’s reactive circuitry being fine-tuned for augmented Spartans. The man who had volunteered suffered the breaking of several bones and the snapping of his spine in three places. Halsey, in her journal, pledged that day she would find out who was responsible for ignoring the specific safety measures she’d put in place to prevent something like this and for failing to enable all the monitors.[56]
Time of testing [ edit ]
Halsey and Déjà.

Catherine Halsey: “Something has happened, Chief. Something ONI and the Admiralty never expected. The brass wants to deploy the Spartans. They want to test them in a real combat mission.” Franklin Mendez: “They’re as ready for that as I can make them. But this is far ahead of your schedule. What happened? I’ve heard rumors there was some heavy action near Harvest colony.” Catherine Halsey: “Your rumors are out-of-date, Chief. There’s no more fighting at Harvest. There is no more Harvest.” — Halsey breaks the horrifying news about Harvest to Chief Mendez.[26]
By September 1, 2525, Halsey had begun applying the new liquid metal crystal version of polymerized lithium niobocene.[75] Its amorphous nature allowed it to be “poured” into a capillary system where microelectric fields could direct crystallization geometries. The material scaled fractally to double a Mjolnir wearer’s strength, but Halsey believed she could exceed even this were she to ignore what she considered archaic safety regulations. In her journal she defended such a move by arguing that nobody had anticipated this technology when such regulations were put in place.[75] Over the next ten days, Halsey spent some time on another trip that took her away from the Epsilon Eridani system.[26] At one some point during this period Déjà brought to her attention a transmission from the planet Harvest in the Epsilon Indi system which the A.I. had been attempting to decode.[4][26] Halsey had Déjà show her what little she had and also asked for a feed from the planet, but nothing of the sort was accessible. The doctor urged her to keep trying.[4]
On September 11 Halsey had just returned to Reach.[26] Chief Mendez was surprised to find her reclining in his chair when he opened the door to his office at 0930 hours that day, as he had been under the impression she would be gone for yet another week. She told him their situation had changed and asked to know where the Spartans were, since she had failed to locate them in their barracks or on any of the ranges. The Chief told her they’d been forced to find them other facilities recently and offered to show her what he meant. He then escorted her to his personal M12 Warthog and drove them both off of the base and onto winding mountain roads leading to a series of titanium mines. They passed a manned guardhouse before descending steeply underground through a tunnel which wound downward in a spiral. Mendez revealed that dozens of old Mark I exoskeletons had been stored down there and were now being used by the Spartans’ trainers, three of whom had been accidentally killed on the first day back from Lambda Serpentis. The vehicle came to a stop within a large cavern, Mendez helping her out and leading her to a small prefabricated one-room building. At the push of a button by Mendez the room climbed a track along the wall until they were twenty meters off the floor. When floodlights snapped on a game of Capture the Flag was illuminated in a large section of the cavern; trainers in armor defending against Spartans. Halsey could not see any of her Spartans at first, but she soon identified a glimpse of motion as Kelly. The trainers were armed with 30mm miniguns loaded with stun rounds, but when one almost landed shots on John at point-plank range the doctor briefly panicked, for even stun rounds could kill at that distance.

Once the flag had been stolen without any sign of the Spartans remaining Halsey asked to see what she’d just witnessed again, sure that it had been recorded. Unfortunately, the teens had already found the cameras and disabled them. The Spartans’ newfound impressive abilities made Catherine conclude there must be unexplained synergistic effects brought on by the combined modifications. Once she made sure to inquire about any physiological or mental instabilities, she then asked Mendez whether he thought they were ready to kill others in real combat. He believed they were, so she let him know something unexpected had happened and that the Admiralty wanted them deployed as a first test. Mendez rightly guessed that the rumors he’d heard about heavy action at Harvest had something to do with this, so it was left to Halsey to inform him that the colony there had been wiped out. She proceeded to bring the observation room back to the floor and told him she wanted the Spartans ready to muster at 0400 hours the next day for a briefing aboard the UNSC Pioneer, a Halberd-class light destroyer which would take them on a mission ONI had been saving for the right crew at the right time. Tomorrow, she said, they would see if all the pain they’d put the Spartans through had been worth it.[26] At 0605 hours the next day both Halsey and Mendez met the Spartans in the Pioneer’s briefing room while en route to the Eridanus system.[76] The doctor walked to a the podium and greeted them with good news: Command had decided to finally put their abilities to the test. The doctor explained that intelligence suggested an insurgent base had been established in the Eridanus system’s asteroid belt by rebel elements who had escaped Operation: TREBUCHET years before. She further introduced them to the URF leader Robert Watts and announced that they were to infiltrate the base to capture him alive to be returned to UNSC-controlled space. Halsey then stepped aside so Chief Mendez could go over the details of the operation. When finished, he and Halsey left the room.[76]
Meeting the enemy [ edit ]
Catherine Halsey: “May I suggest that we go to battle stations, Captain?” Wallace: “I don’t see the point.” Catherine Halsey: “We haven’t let this be widely known, but when the aliens were first detected at Harvest, they appeared at extreme range… and then they were suddenly much closer.” John-117: “An intrasystem jump?” Catherine Halsey.: “Correctly surmised, Spartan.” — Doctor Halsey makes sure the Commonwealth’s captain knows the threat posed by the Covenant in naval engagements.[77]
At some point following October 7, Doctor Halsey officially requested access to the data archive of an RQ-XII drone originally deployed from the UNSC Walk of Shame and recovered by the CMA Heracles at Harvest.[78] Her request was granted with a warning that all queries would be logged in accordance with protocol. Halsey searched the archive using the keywords “AO.AI”, “Mack” “rampancy” and “lifespan limits”. The data captured in the log was formed of messages from the agricultural operations A.I. Mack intended for Sif, the planet’s shipping operations A.I. The garbled messages demonstrated the A.I.’s descent into rampancy over a period of eight months.[78] The Pioneer did not return to Reach until November 2 of 2525.[4] At 0600 hours that day Halsey met the Spartans within the same secure briefing amphitheater where she’d introduced herself to them years earlier.[79] They were also joined by Chief Mendez and Admiral Stanforth, who informed the teenagers that Harvest had been annihilated some time ago by what appeared to be alien attackers. The adversary responsible called itself “the Covenant” and had broadcast a message announcing that the destruction of humanity was the will of its gods. Stanforth told them that the UNSC had been ordered to full alert and that the largest fleet action in human history was being mobilized in response. And because of the UNSC-wide mobilization, the Spartans’ training was to be accelerated to its final phase: Project: MJOLNIR. Halsey spoke briefly with Mendez and Stanforth following the meeting’s conclusion before leaving with the admiral.[79] At some point soon after the revelation of their new alien enemies, the doctor and others made sure to add a refractive coating to the design of the shell for each set of armor in order to disperse energy weapon attacks.[80] By November 6, Halsey and the Spartans had departed Reach aboard the Paris-class heavy frigate UNSC Commonwealth.[77] The next three weeks were spent handling a variety of minor missions under her guidance on their way out to Chi Ceti IV on the edge of UNSC-controlled space. All of the Spartans worked together to put down multiple insurrectionist factions on Jericho VII and also to remove a black market bazaar near the Roosevelt military base.[77][81][82] [77] Captain Wallace told Doctor Halsey that he might have had her removed from his ship’s bridge had its bulkheads not been sealed, in response to what he saw as outbursts against his orders from someone with no combat experience.

It was at 1750 hours on November 27 that the Commonwealth finally emerged in real space in the Chi Ceti system.[77] Halsey then immediately summoned John to the bridge, where she waited with the ship’s Captain Wallace. The doctor called his attention to a screen displaying deconvoluted radar signals, including one which was repeatedly appearing and might represent another ship eighty million kilometers away. Though Wallace didn’t see the need Halsey urged that they go to battle stations and let him and John know that at Harvest the aliens had been observed making an intrasystem slipspace jump, something beyond the capability of human technology. This new information was enough to change the captain’s mind and before long the ship had changed its heading and its bulkheads had been sealed. The doctor informed John that they’d be taking one of the Commonwealth’s dropships to the surface of Chi Ceti IV and instructed him to get the others ready to depart, seeing as it was vital the Spartans reached Project: MJOLNIR before the Covenant did. Almost immediately after he’d relayed orders to muster them an alien ship a third the size of the Commonwealth suddenly appeared three thousand kilometers off its prow. Both vessels quickly engaged one another and Halsey was surprised to see that even a Covenant ship of such small size was equipped with energy shielding. Even a direct hit from the frigate’s magnetic accelerator cannon only served to disable its shields rather than destroy the ship. Captain Wallace gave orders to ready another round at that, but Halsey argued against this, instead imploring him to initiate evasive maneuvers. Having the doctor second-guess his command led the captain to threaten her with being gagged. Yet soon enough they were been struck amidships by the enemy’s weapons and multiple decks had melted in Section One. When fires were reported throughout various sections Catherine suggested the crew don respirator packs so the atmosphere could be vented on all decks outside the bridge and this time, Captain Wallace assented to her recommendation. When he demanded to know what they’d been hit with she explained that the aliens could evidently guide the trajectory of plasma through space. Their MAC system having been destroyed, Halsey next floated the idea of attacking with nuclear missiles but was once more rebuffed by Wallace since the enemy was far too close to them to make their use safe. Both she and John then concluded that using GA-TL1 Longswords to distract the aliens could afford them the safe distance they would need to use nuclear weaponry. To their dismay the smaller ship still remained intact, although obviously crippled, after being hit with the blast of a Shiva-class warhead. For her part Halsey could at least appreciate that even if they couldn’t destroy the enemy’s ships they could evidently at least slow them. With the Covenant craft moving off Wallace ordered the Commonwealth to execute a flyby orbit so that Halsey and the teenagers could depart for the Damascus Materials Testing Facility in Vhalkem as they passed by it. He told the doctor he would attempt to lead the Covenant ship away if it came back but that they should plan to reconvene in orbit no later than 1900 hours. She immediately turned back to John and told him to they needed to hurry, as there was much she had to show the Spartans.[77]
MJOLNIR [ edit ]
“Even though this technology will save humanity in the war to come, I must remind myself: liquid crystal cannot rise on its own. Titanium alloy cannot prevail in the face of extinction. Armor cannot hope. It all means nothing until you step inside.” — Halsey shares her thoughts with her Spartans.[83]
After landing, it took around fifteen minutes for a freight elevator to carry Halsey and the Spartans down into the depths of Chi Ceti IV, finally depositing them in an underground hangar at around 1845 hours.[80] Catherine only had to clear her throat to garner the attention of the space’s three technicians and to make at least a dozen A.I. avatars vanish from view. She then wasted no time introducing the Spartans to Project: MJOLNIR and breaking down the basic parts of the armor suite for them.

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Alpha Corvi II [ edit ]
Main article: Battle of Alpha Corvi II

Catherine Halsey: “UNSC Command is pleased… But they still don’t trust the Spartan-II project.” Linda-058: “So we noticed.” Catherine Halsey: “There is concern that your presence will negatively influence marine battle readiness. Luckily for you, Alpha Corvi II provides another chance for you to prove yourselves.” — Doctor Halsey provides motivation for John, Fred, Kelly, and Linda.[84] [85][86] Blue Team’s actions on Alpha Corvi II were still not enough to endear Halsey’s Spartans to the rest of the UNSC which knew about them, but they had more success in that regard a few months later

On December 3, 2525, Halsey met with Blue Team within the ready room assigned to it on the Persian Gate while still en route to the Alpha Corvi system.[84] She stated that seeing as they had had the past two days to get used to the idea, in their gut, that a Spartan fall in battle, it was now time to put their grief aside. She told them that though they should honor that emotion, it would only be a hindrance to the upcoming fight they were sure to be sorely needed for. Lieutenant Commander Yao entered then and took it upon herself to brief the team on the Covenant’s present attack on Alpha Corvi II. She explained the role Blue Team was to play in the defense of Jamshid, the planet’s largest city, but then left the remainder of the briefing to Halsey. Once Yao had left, Halsey encouraged the four teens by letting them know the Mjolnir armor had performed better than had been hoped for during the engagement at Chi Ceti IV and that much of that had been due to their operating skills. And though she could say that UNSC Command was pleased, she reminded them that the Spartan-II project still wasn’t trusted and that there was especially concern that their presence could negatively influence marine battle readiness. Luckily for them, she offered, Alpha Corvi II just provided another chance for them to prove themselves. Once an A.I. aboard the Persian Gate named Nora provided Doctor Halsey with updated medical scans for each member of Blue Team, she confirmed with John that he was well enough to fight. She also asked whether he would tell her if he wasn’t to which he simply said that she’d find out if that ever happened. Taking her leave, she instructed the Spartans to suit up as they’d be exiting slipspace within thirty minutes. She later rejoined them after they’d arrived at the colony to see them off. During the Spartans’ insertion via D77-TC Pelican, she remained in contact with them and let them know that while their first priorities were the neutralization of the enemy and the defense of Black Reef, a mining settlement they’d been redirected to after the Persian Gate was contacted by the ground, she also wanted them to try to find out why the aliens were targeting it specifically. She asked that they pay attention to the enemies’ tactics, unit composition, weapons. As the craft drew near its landing zone, she closed by telling the four of them not to expect any help from marines on the ground, as Command didn’t want the two groups interacting.[84]
Over the course of the engagement that ensued on the surface, Blue Team followed a group of Covenant within the mines beneath Black Reef and contact was eventually lost with them.[87] Yao was anxious to know what the Spartans were doing and was also overly concerned that they wouldn’t be able to escape back to the surface, seeing as the mine entrance they’d entered through had been blown up. Halsey confidently asserted, however, that they were just following their orders and that their resourcefulness should not be underestimated. As the fighting wore on, both planetside and in orbit, the probabilities of both tactical victory and survival of the UNSC fleet began to decrease sharply. At the recommendation of Nora, Yao ordered a general evacuation order for all UNSC personnel on the surface and also ordered for Blue Team to be located so they could provide extraction coordinates. Halsey asked that one Pelican be set aside specifically for her Spartans but Yao just told her to ask again once they reestablished comm contact.[87] Blue Team was able to exit the mine by moving underwater toward the shore of the island Black Reef sat on.[85] Yao, worried, inquired as to whether Mjolnir was designed for submarine operations, to which Halsey admitted it wasn’t but surmised that her Spartans must be improvising. The Pelican Tango 807 collected the team and ferried it back to the Persian Gate and Halsey met the four of them as they exited. John was incensed that members of the United Rebel Front who had aided them against the Covenant were being left behind to die, but Halsey tried to make him understand that every fight will always involve some collateral damage and that the most important thing was that he got his team out. She then pushed to find out if he had been able to ascertain what the Covenant had been looking for in the mines. The Persian Gate jumped from the system a short time later, leaving Alpha Corvi II to the aliens.[85]
A change in tactics [ edit ]
On February 24, 2526, Halsey puzzled in her journal over the meaning of the term “Covenant”, specifically wondering whether it referred to an agreement between the various species or to a bond believed to be shared between them and a higher power they worshiped.[88] She believed that finding the answer was necessary in order to better understand and exploit the aliens’ psychology. In addition, she questioned how many races might belong to the collective that yet remained unknown to humans.[88] On March 5 of 2526 twelve Spartans of Gold, Green, and Blue teams boarded a Covenant frigate above the uninhabited planet of Netherop in the Ephyra system.[89] During the boarding action a sensor operator on a nearby prowler activated SQUADCOM and gave away the Spartans’ presence.[90] Following the ship’s destruction, Halsey shared a portion of their TEAMCOM download with the responsible crewman and his commanding officer, Lieutenant Commander Hector Nyeto, so that they could hear how the Spartans had reacted to being compromised.[91] Nyeto later claimed that Halsey had yelled at the operator and by the time she let them both go he was so sick about the mistake that he was volunteering to find Daisy-023 to introduce himself.[91] Unknown to Halsey then, the activation had actually been intentional, as Nyeto and those loyal to him wanted the Spartans killed on behalf of the Insurrection.[86]
SILENT STORM [ edit ]
Preston Cole: “The UNSC has two choices at the moment, the one rotten and the other lousy. Either we engage the enemy right now and start losing fleets in battles we have no chance of winning, or we mass at strong points and let the enemy glass everything else.” Catherine Halsey: “I should think the answer is obvious. We mass at the strong points. It will take the Covenant at least two years to locate all of our undefended worlds, and by then the Materials Group will have reverse-engineered—” Michael Stanforth: “Catherine, FLEETCOM can’t do that. We’d be leaving hundreds of worlds defenseless. We’d be condemning billions of colonists to death by plasma incineration.” Catherine Halsey: “And if you commit prematurely, you will lose every fleet you send—and leave hundreds of worlds defenseless anyway. I think you need to make FLEETCOM understand that, Admiral Stanforth. There is nothing you can do to save those people—not until I can give you the tools you need to fight.” — Doctor Halsey argues, unsuccessfully, for a strategy that would sacrifice billions but conserve military losses.[92]
By March 7 she was aboard the Valiant-class super-heavy cruiser UNSC Everest within a deep space transitional zone of the Dynizi system.[92] At shortly after 0840 hours, in a compartment located within the Flag Deck’s secure conference suite, Halsey met with vice admirals Stanforth and Preston Cole, who commanded the Everest. The three of them had met to plan a means by which the Navy could feasibly fight back against the Covenant. Catherine had also concluded that Staff Sergeant Avery Johnson of the Marine Corps would also be a valuable asset to have at their disposal, so he soon joined the meeting as well. When Johnson entered the room he found Halsey forcefully arguing the necessity of another attempt at capturing a Covenant ship, such a mission having been recently tried and failed by twelve of her Spartans. She argued that it was of paramount importance that they gathered as much of the aliens’ technology as they could, since she believed the only way to beat the aggressors was through reverse-engineering it. She also was of the opinion that the best strategy at that moment would involve massing fleets at strong points, leaving most colonies undefended while she and others within ONI’s Materials Group worked over the next year or two to deliver the ability to fight back. Halsey implored Stanforth to make FLEETCOM understand this, but ultimately backed down and admitted that she had been making assumptions about the aliens’ strategy that were unjustified with what little they knew about them. In the face of this admission, however, she stressed once more the importance of capturing an enemy vessel. As far as she was concerned the recent try had not been a total failure thanks to the capture of a few Type-26 Banshees and the destruction of the ship. It was with reluctance that Halsey finally agreed such an acquisition couldn’t be the prime objective of the upcoming operation—it would need to be secondary to blunting the enemy’s advance against their worlds. When the conversation eventually turned to why Avery had been handpicked to assist with this op Halsey reminded him of his experience fighting the Covenant just a little over a year prior and his history as an ORION Project volunteer. She had hoped his Special operations background and creativity exhibited at Harvest would lend themselves to the creation of new infiltration tactics for each ship they targeted. Additionally, the doctor pointed out that his experiences with ORION made him able to relate to the Spartans, introducing the sergeant to what they were and how they had been trained. Stanforth described Johnson’s role to be a sort of “big brother” to the Spartans during the mission, with Halsey making sure he understood he’d never be able to replace their squad leader.[92]
The next day Halsey joined Johnson and both admirals aboard the Point Blank-class prowler UNSC Vanishing Point in deep space within the Polona sector.[93] At 0558 hours she led John-117 into the ship’s tactical planning center for a meeting with the aforementioned men, Captain Halima Ascot, and Colonel Marmon Crowther, commander of the 21st Space Assault Battalion of orbital drop shock troopers. Halsey took the first open chair around the TPC’s conference table and before long was being introduced by Cole as leading their effort to analyze and reverse-engineer alien tech. The mission those present had gathered to discuss, Operation: SILENT STORM, was being conceived of as a desperate mission with the stated aim of boarding as many Covenant capital ships as possible in order to detonate small-yield tactical nuclear weapons within their hulls. When Colonel Crowther balked at these aims, Halsey suggested that John be put in command of his troopers. She had previously broached this suggestion with Cole, who rebuffed it for a second time, stating that John was not ready to lead something of that scale. Halsey began to argue in kind but was cut of by John himself, who agreed with the admiral. This earned him a scowl from the doctor but she did not press the point any further after that. Ascot, who would be leading an all prowler force dubbed Task Force Yama, let Halsey know she would be confined to the Vanishing Point for her own safety for the operation’s duration. Halsey began to protest this but relented when Cole threatened to ship her back to Reach should she try to leave the ship.[93] Following this meeting Catherine gave Johnson access to the Spartans’ TEAMCOM to facilitate his role as liaison between they and the ODSTs and also made it clear to John that he should give the sergeant’s advice a lot of weight—especially when navigating the vagaries of protocol inherent in their attachment to the 21st.[91][94]
Seoba [ edit ]
Main article: Battle of Seoba

Task Force Yama reached the Kolaqoa system and the planet Biko’s third moon, Seoba, on March 18.[91] Seeing as Biko lay right in the path of the enemy’s current invasion route, it had been picked as the perfect spot to lie in wait for the Covenant.[93] The task force was soon met with resistance from insurrectionists working in concert with the Biko Independence Army during its insertion of Spartans and ODSTs to an abandoned ice quarry on the moon.[94]
The following day, Halsey was transported from the Vanishing Point for an impromptu after action debriefing held around a folding conference table within Assembly Chamber 4L430 in one of the quarry’s abandoned habitats.[95] She was seated between Captain Ascot and Colonel Crowther; also present were Captain Nelly Hamm, Sergeant Johnson, Lieutenant Commander Nyeto, and John-117, who the debriefing principally concerned. During Ghost Flight’s insertion Alpha Company had taken on an inordinate amount of casualties, and the unorthodox manner in which John had partially led that drop was being questioned. Halsey pushed back against the very notion that anything had gone wrong with the drop, seeing as the dockyards had been captured in less than an hour. She was surprised to hear, however, that it appeared the enemy had been expecting them. Regardless, Captain Hamm claimed that while still in the UNSC Ghost Song John had dumped a wounded trooper in her lap for the sole purpose of keeping her preoccupied so he could do things as he saw fit. Halsey was quick to defend him, but John confirmed the captain’s accusation. Nyeto also spoke in John’s defense, but in doing so let on that he may be younger than the age currently being claimed for him. As the conversation shifted to this matter Halsey protested its relevance and told Captain Ascot the true ages of the Spartans were compartmentalized and classified Top Secret Level One. She also assured her, however, that their training and judgment was unparalleled. Despite her efforts at further concealment the lieutenant commander explained how he’d realized the Spartans must all be around fifteen years old then. He claimed to have a friend who had trained with a bunch of eight-year-olds on Reach seven years prior. Halsey responded by leaning forward so her upper body shielded Nyeto from Ascot demanded how he could know those eight-year-olds were her Spartans, and once again it was John’s inability to convincingly lie that had given away the truth. The doctor was finally forced to resort to saying the Spartans’ ages could not leave the room, but Colonel Crowther was quick to threaten her with incarceration for violations of the Uniform Code of Military Justice. Catherine asked the man if he really thought his superiors would let the Judge Advocate General hear about this before emphatically declaring that despite their youth, the Spartans were not children. Ascot and Crowther determined that they were to be sidelined for the remaining duration of SILENT STORM—something Halsey strongly urged them to reconsider.[95]
After a long silence, the debriefing returned once more to the matter of Alpha Company’s casualties. This soon led the discussion to the topic of how the insurrectionists had seemingly been ready for their arrival, with John realizing and convincing the others that they had instead been waiting for the Covenant, with the intent to meet them for negotiations. While they were planning for the Covenant’s inevitable arrival, a flotilla of the alien ships arrived in-system and set course for Seoba. As the UNSC leaders rushed out of the chamber to ready their forces, John offered the assistance of he and his Spartans for the task force’s boarding attempts, with Halsey vouching that this kind of mission is exactly what she created them for. Still, Crowther refused and ordered John and his compatriots to load the roughly 300 captured insurgents onto a transport to be sent to Biko. After John accepted the assignment, they all left the chamber and Halsey was transported back to the Vanishing Point, which had moved to a safer position two planetary orbits out from Biko.[95]
In the ensuing battle, Captain Ascot’s UNSC Starry Night was shot down and John decided that they would search for survivors, as the Spartans were the only unit readily available to assist.[96] Back in the quarry, they found the prowler’s crash site, but an intrusion corvette was seemingly attempting to recover it. Since the data within its computer systems could present a major security risk if acquired by the Covenant, John decided that they would activate the Starry Night’s self-destruct.[97] While the Spartans experienced some setbacks and injuries during their attempt at boarding the prowler, a team led by Fred-104 made their way inside, rescued some survivors, and armed its Fury nuke. The resulting explosion destroyed both the prowler and the intrusion corvette. However, the alien vessel’s forward fuselage was left mostly intact,[98] allowing the Spartans to search it for any salvageable technology. Sure enough, they found a functional starholo and removed it, bringing the device back to Halsey for her to examine.[99]
The next day, after spending some time with the starholo, Halsey attended a funeral service on the Vanishing Point to honor the men and women of the UNSC Navy who lost their lives at Seoba. She stood near John and the five other Spartans who were not relegated to the ship’s infirmary. After the ceremony, Hector Nyeto—now the de facto commander of Task Force Yama after Ascot’s death—approached John to complement him and his team on preventing the Covenant from capturing the prowler. When Halsey pointed out that they had also managed to destroy a corvette, Nyeto enthusiastically added that they had also recovered the starholo, clearly trying to get on her good side. He then made a comment on how she might deduce something useful from the alien machine, to which she responded with a calculated smile. Because of Nyeto’s seeming appreciation for the Spartan-IIs, John asked him if he would reconsider their sidelining. The lieutenant commander promised that they would see all the action they could handle, prompting Colonel Crowther to deny this one more due to their young age and the fact that the Spartans reported to him. This resulted in a shouting match between the two officers that ended in Nyeto relenting after being threatened with a report to a board of inquiry. After this shocking exchange, Halsey grabbed John by the arm and directed the Spartans out of the hangar toward the Black Daggers’ quarters.[99]
Later that day, the Covenant’s Fleet of Inexorable Obedience arrived in the Kolaqoa system and began their assault on Biko. As Task Force Yama and the Black Daggers joined the battle, Colonel Crowther sent Staff Sergeant Johnson to give the Spartans their new orders on the UNSC Vanishing Point. Informing them of the colonel’s suspicions toward Lieutenant Commander Nyeto, Johnson told the Spartans that Crowther was sending them to Etalan to attack a small logistics fleet supporting the main element at Biko.[100] A few hours later, Halsey, Johnson, and the Spartans entered slipspace aboard the Vanishing Point with a course set for the Igdras system.[101]
Etalan [ edit ]
Main article: Battle over Etalan

On March 22, 2526, the Vanishing Point and its two prowler escorts arrived at Etalan to find a logistics fleet of fifteen Covenant vessels orbiting the planet. During the two-day trip, John-117 and Johnson had determined that they would target the fleet’s munitions and food supplies, assuming they could identify which ship served each role. About five minutes after the detachment began observing the alien vessels, Halsey had already theorized that the trio of large vessels dipping in and out of Etalan’s upper atmosphere were the munitions carriers, collecting and refining the gas needed to synthesize the fleet’s plasma. However, Halsey did not share this theory with anyone else for fear of it leaking to Insurrectionist spies serving under Hector Nyeto. For the next four days, the Vanishing Point’s analysts would continue their observations of the fleet until they were confident that four of the vessels acted as equipment freighters. Gold and Green Teams were deployed via S-14 Baselards to attempt to board and destroy these ships from the inside using HAVOK nuclear weapons. Meanwhile, Johnson and Blue Team prepped to enact their own plan to destroy what the analysts believed to be Mjern-pattern agricultural support ships. Before they deployed in the Banshees they had captured during their attack on the Radiant Arrow a few weeks prior, Halsey visited them in one of the Vanishing Point’s hangars. She informed the Spartans that they should target the three “air-skimmers” and that she had realized Nyeto and those serving under him were aligned with the Insurrectionists when the lieutenant commander revealed John’s true age at Seoba. In the time since then, Halsey had also found various surveillance devices hidden in her lab. Halsey then mentioned to them that she had made some progress on deciphering the captured starholo, and that crippling the logistics fleet and forcing the Fleet of Inexorable Obedience to fall back to resupply would help her narrow down the location of the Covenant’s primary supply depot in the region.[101]
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Naraka [ edit ]
Catherine Halsey: “Habitable worlds create gravity wells, and there aren’t any—not within four days of the most likely transit nodes.” Déjà: “But there is a habitable world within five days of Transit Node Bhadra. Perhaps it’s not my calculations that are mistaken, but your assumption.” Catherine Halsey: “Are you suggesting the Covenant has instantaneous interstellar communications?” Déjà: “I am suggesting the Covenant has a great deal of… technology that we don’t… understand.” — Déjà brings Halsey to the right conclusion based on the evidence, despite being slowed by a data miner.[102]
At 0626 hours on March 31 Halsey was in the middle of studying the captured starholo.[102] The Vanishing Point had relocated to the deep space Rendezvous Point Sierra-Yama within the Polona sector. With a little luck and lots of hard work, the doctor was hoping she could trace the Covenant’s slipspace routes back to the invasion fleet’s primary supply depot. By this point she had already identified more than twenty transit nodes which opened near what she believed were Etalan, Harvest, and Netherop, and four of these were near other nodes which led out of human-controlled space. Five days had passed before a new supply convoy had arrived at Etalan following the previous one’s destruction, so Halsey surmised its point of origin had to be somewhere between one-half and three-quarters of that distance at the aliens’ slipspace travel rates. She asked Déjà how certain the A.I. was about the size of the logistics base that the Covenant fleet must require, but she only reconfirmed what had already been calculated previously. Catherine was flummoxed, since there simply weren’t any habitable worlds within four days of the likely transit nodes. Déjà deigned to point out there was one within five days of Transit Node Bhadra, however. Implicit in this observation was the idea that the Covenant must have instantaneous interstellar communications.[102]
By this point Catherine had discovered a data miner had been slipped into her quarantined lab by Hector Nyeto or one of his operatives.[102] It was causing Déjà to make erratic pauses while speaking and had already stolen her most closely guarded data, but Halsey was tolerating it because she didn’t want Nyeto to know she had noticed it yet. Nonetheless, the doctor agreed with what Déjà was suggesting and determined they ought to proceed to Transit Node Bhadra. With that settled the A.I. notified her Colonel Crowther had finally arrived. Catherine deactivated the starholo and ran her fingers through her hair briefly before meeting the colonel at her door. She’d sent him a message asking him to meet her there as soon as their rendezvous was complete for a “personal matter”, and now that he’d shown up she feigned delight at his presence and took his arm to draw him toward her personal quarters. She confessed to being unable to wait any longer to be alone with him and made sure to press her flank against his as she pulled him through the other door into her little galley area. Once they were both sealed within, however, she released him and said she only needed to talk someplace safe. She let him know she swept for eavesdropping devices within her quarters three times daily and had found nothing so far. She offered the men water and apologized for leading him along before stating they needed to discuss how they were going to handle Nyeto before he tried to kill her Spartans again.[102]
Through researching Nyeto’s records Catherine learned he had spent a lot of time with the infamous Robert Watts early in his career.[86] She and Crowther told John that though they would leave him alone as the task force’s commander for the time being, they planned on using him to mislead the enemy. Despite the improved slipspace efficiencies afforded by Doctor Halsey’s understanding of the alien starholo, it still took the task force time to arrive at Transit Node Bhadra, more than two hundred light-years past humanity’s farthest known exploration. It was Halsey who had named the transit node, and she likewise chose to call the sector of Covenant space they were invading by 0458 hours on April 14 Muruga, both Hindu names meant to honor Captain Ascot. Their target planet and its moon she called Naraka and Rudara, respectively.[86] By April 15 Halsey had viewed reconnaissance videos which showed Naraka was encircled by a ring of orbital support stations connected by a transit tube enclosed within what she called a trussing armature.[103] In her estimation, if Sierra Force could destroy at least ten facilities and their connecting armature there was a ninety-two percent chance the ring’s orbit would grow unstable and fall into a rapid, irreversible decay.[103] If only nine were destroyed, she predicted the odds of that happening dropped to seventy-one percent, and if only seven, forty-nine percent.[104] Ultimately, Operation: SILENT STORM scored a giant win for the UNSC when the orbital ring was successfully brought down thanks to her Spartans and Crowther’s ODSTs, but the colonel lost his life and Hector Nyeto fled from the rest of the task force during the mission.[104]
Total War [ edit ] [105] Doctor Halsey considered the dendritic growth of cross-connections in volitional A.I.s near the ends of their lives to be akin to the spread of cancer in biological organisms.

“Vice admiral ordered us to repurpose everything to quell the Covenant threat, and to refocus our research on wartime strategy. I couldn’t agree more (it was, after all, my idea).” — Catherine takes note of the UNSC’s shift in priorities within her journal.[106]
Thirteen days later, on April 28, Halsey noted in her journal that Vice Admiral Stanforth had ordered she and others to repurpose everything to quell the Covenant threat and to refocus their research on wartime strategy.[106] She couldn’t have agreed more, seeing as doing just that had been her idea to begin with, though she did sarcastically ask if the Insurrection would adhere to the policy as well. By this time Halsey had learned ONI Section Two had sent emissaries to leaders in the Outer Colonies to warn them of the Covenant and to make them offers of peace. Footage from the glassing of Bliss generally convinced these leaders of the magnitude of the threat they all faced. In her journal Halsey wondered if the aliens might have solved their civil war—not a trade she would have made, but perhaps a small victory nonetheless.[106] On May 3 Catherine reviewed in her journal the distinctions between so-called “”smart” (volitional) and “dumb” artificial intelligences and why the “smart” ones are susceptible to rampancy.[105] She noted that she had devised new matrix strata with random-access optical couplers that could theoretically extend a volitional A.I.’s lifespan, though by exactly how much she was unsure. In simulations a randomly coupled matrix also boosted correlation effects such as accurate guessing. As volitional A.I.s were needed then more than ever to counter the Covenant threat, Vice Admiral Stanforth had authorized a test run of Halsey’s protocols. After leaving herself a reminder to investigate the polarization of topological soliton pulse transfers she concluded that day’s writing by questioning whether she was playing the role of God or mother in breeding life from non-life, or perhaps simply being beguiled by sentimental anthropomorphism.[105]
Near the start of May John-117 told Halsey he suspected the Covenant had created a special Spartan-hunting unit based on encounters he’d had with well-trained warriors in distinctive armor during Operation: SILENT STORM.[32] In response the doctor immediately distributed a list of precautions and procedures she wanted implemented whenever her Spartans were in a combat theater. On June 3 Task Force Pantea, a wolf pack of Battle Group X-Ray, managed to knock out the shields and primary weapons of a Covenant frigate and seemingly ground it on Netherop. At least a day later, it was determined that Blue Team would be deployed to the planet to aid an ONI salvage ship, the UNSC Phyllis Wheatley, in an attempt to capture the enemy vessel. Halsey recorded a message for John in which she acknowledged the entire situation was likely a trap but stated she wanted the Spartans to secure the alien ship anyway. A fully functional Covenant vessel could give the UNSC the knowledge needed to develop effective countermeasures. The doctor reminded him how important the starholo recovered on Seoba had been to SILENT STORM and e

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[Season 1] Spartan Ops Episode 11: Exodus Conclusion (Halo 4 Spartan Ops Cinematic)

Spartan Sarah Palmer was tasked with assassinating Halsey, and when she was close enough to take a shot another fireteam (I don’t remember their names) moved in to save Halsey. Palmer took the shot, but only hit Halsey’s arm. Jul M’Dama amputated her arm to save her life (so as not to lose too much blood).

Halo 4: Spartan Ops Movie (2013) With Additional Bonus Footage

So you have finished reading the how did dr halsey lose her arm topic article, if you find this article useful, please share it. Thank you very much. See more: why did palmer shoot halsey, how did halsey get her name, how did dr halsey die, dr halsey death, what happened to dr halsey in halo infinite, is dr halsey a psychopath, when did halsey date mgk, dr halsey war criminal

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Catherine Halsey

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