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Battle of Installation 05

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Battle of Installation 05
H2A - Battle of Delta Halo.jpg

Conflict:

Human-Covenant War, Great Schism

Date:

November 2–4, 2552

Location:

Installation 05, Coelest system

Outcome:

Inconclusive

Details
Belligerents

Covenant

Flood

Commanders

Gravemind

Strength

Forerunner constructs

Casualties
  • In Amber Clad
  • Many infantry and vehicular losses
  • Large numbers of assorted starships
  • Large numbers of Sentinels and Enforcers
  • High Charity captured
  • Prophets of Regret and Mercy
  • Tartarus
  • Many infantry and vehicular losses
  • Large numbers of assorted starships
  • All Flood forms on the surface of Installation 05
  • Numerous assorted Flood forms in orbit
 

Miranda Keyes: "Cortana, what exactly am I looking at?"
Cortana: "That... is another Halo."
— Commander Miranda Keyes and Cortana upon discovering the installation[2]

The Battle of Installation 05, also known as the battle for the Second Ring of the Gods among the Covenant,[3] was a major engagement in early November 2552 between the Covenant, the Flood, and the United Nations Space Command, with the aid of Forerunner Sentinels and the Sangheili on the Forerunner ringworld Installation 05, otherwise known as "Delta Halo".

The battle saw the splintering of the Covenant empire as the Great Schism began, and the formation of an alliance between humanity and the Sangheili of the Fleet of Retribution, led by Thel 'Vadam and Rtas 'Vadum.

Prelude[edit]

At some point, an ancilla warned the monitor of Installation 05—2401 Penitent Tangent—of a pending outbreak in one the installation's Flood containment facilities. However, Penitent Tangent ignored the warning, and those that followed, for millennia. The installation's sentinels managed to keep the Flood largely contained in the Quarantine Zone around the Library, although the machines never managed to fully destroy the infestation.[4] Eventually, a Gravemind formed on the installation and captured Penitent Tangent.[5]

In Amber Clad approaches Installation 05.

At the beginning of the Battle of Earth in October 20, 2552, the Prophet of Regret led Fleet of Sacred Consecration, which contained two CAS-class assault carriers and thirteen Ket-pattern battlecruisers on an expeditionary raid that stumbled upon Earth, humanity's homeworld and the UNSC's strongest fortress.[6] After substantial ground, air, and space losses, and faced with the possibility of being overrun on the ground and intercepted by UNSC ships if it tried to escape to orbit, Regret ordered a retreat. With Regret aboard, Solemn Penance made an emergency in-atmosphere slipspace jump over New Mombasa, with the Stalwart-class light frigate UNSC In Amber Clad following it into slipspace.[2][7]

At Fleet Admiral Lord Terrence Hood's order, UNSC Coral Sea, UNSC Dusk, UNSC Paris, and UNSC Redoubtable were sent to follow and assist the In Amber Clad with the heavy assault carrier, as they were the closest, fastest UNSC ships to the carrier with charged slipspace capacitors. The ships intended to find out where the assault carrier was heading, or destroy the ship entirely to kill Regret.[8] Their shadowing, however, was not exactingly precise. Only the frigate In Amber Clad successfully trailed the assault carrier to its destination. Dusk, a prowler, arrived a day later near the Covenant holy city of High Charity. While Coral Sea[9] and Redoubtable[10] conducted scans of Delta Halo's surface, the fate of the Paris is unknown.[11]

The battle[edit]

Opening actions[edit]

On November 2, 2552, Solemn Penance exited slipspace over Installation 05, orbiting Substance in the Coelest system. Regret's assault carrier took position over the installation, establishing a solid ground presence with armor and patrols of Type-26 Banshees, and also companies of infantry by means of Ru'swum-pattern Phantoms. The Covenant ground forces fortified themselves in a series of Forerunner ruins and temple structures, establishing anti-air defenses.[2]

John-117 and a team of ODSTs insert into the atmosphere of Installation 05 in HEVs.

Meanwhile, In Amber Clad trailed behind and Commander Miranda Keyes, captain of In Amber Clad, ordered the ship's platoon of Orbital Drop Shock Troopers and John-117 to establish a landing zone near a series of ruins and temples on Installation 05 to allow Sergeant Major Avery Johnson to bring in two D77-TC Pelicans to further expand the UNSC presence. The frigate made a quick pass-over of a segment of the ringworld, deploying eleven SOEIV pods. Most survived the atmospheric insertion to the surface of the ring, but due to Covenant stationary turret-fire only four personnel survived to make landfall—John-117 and ODSTs Gunnery Sergeant Stacker, Staff Sergeant Banks and Private First Class Dubbo.[12] A second wave of SOEIV pods was deployed from In Amber Clad, however the few ODSTs who managed to make landfall found themselves isolated behind enemy lines and were quickly killed.

Battle for Delta Halo artwork
John-117 and some UNSC Marines on the surface of Installation 05, with Solemn Penance looming overhead.

Upon landing, John-117 led the ODSTs in eliminating Covenant Shades stationed around a small temple, in order to clear an LZ for vehicular reinforcement. After successfully clearing the temple and it's courtyard, John-117 and his Troopers defended the position against waves of Covenant troops until a Pelican could drop off an M12 Chaingun Warthog. After liberating a nearby Forerunner bridge-control facility, a Scorpion was delivered alongside Marine reinforcements. The UNSC forces assaulted the bridge, which was defended by a Wraith, numerous Ghosts and a pair of Banshees. After successfully crossing, the convoy continued to battle through a vast temple complex, encountering significant Covenant defenses en route to Regret's location. After securing a large temple, the force dismounted and were resupplied with weapons and reinforcements via Pelican before securing the interior on foot. A passage inside the temple opened into a small vale occupied by Covenant, and after neutralizing a sizable force of Covenant Infantry, John-117 and his forces arrived at the edge of the lake containing Regret's temple.

Arriving in the first room of a large ruin complex standing in the lake itself,[2] Cortana translated a sermon from the Prophet of Regret, alerting the UNSC that the Covenant was intending to activate Installation 05. Commander Miranda Keyes had been reviewing Cortana's information from the installation her father had discovered a month prior,[13] and was able to locate Installation 05's Library. She set out to reach it and secure it's Activation Index before the Covenant could do so. Sergeant Johnson was ordered to extract the Marine and ODST forces supporting John-117 and rendezvous with the In Amber Clad at the Library.[14]

Assassination of Regret[edit]

Main article: Assassination of the Prophet of Regret
John-117 reels his fist back to violently punch the Prophet of Regret.

John-117 was ordered to continue to Regret's temple and neutralize him. Supported by a pair of Marines, one of which was PFC Dubbo, John battled through a cluster of Covenant-filled towers before reaching an open platform. At the time, the Covenant were becoming increasingly aware of UNSC activity on the Ringworld, causing Commander Keyes to reroute several Pelicans on their way to the Library to aid John-117 rather than have them draw attention to the In Amber Clad. The Pelicans air-dropped Materiel Acquisition Pods on the platform to resupply the trio with fresh weapons and ammunition. John's strike team continued their attack, proceeding from the platform to an anti-gravity gondola which took John-117 and the two Marines to a underwater temple with a heavy Covenant presence. Cortana was able to intercept several transmissions between Regret and the Prophet of Truth. After emerging from the submerged temple at a hilly Forerunner ruin, they were engaged by Covenant infantry, reinforced by Phantoms attempting to halt the UNSC advance.[15]

Despite significant reinforcement the Covenant were unable to stop the Spartan from closing in on his target. Meanwhile, Marines from the rerouted Pelicans had secured the first tower cluster to use as a landing zone. A single Pelican remained on station, resupplying John with more ordnance pods before setting down on the tower platform to await the Spartan's signal for evac. The strike team boarded the final gondola leading to the temple the Prophet of Regret was located in. Despite being attacked by Covenant Type-26 Banshees and Sangheili Rangers, they were able to gain access to the main temple. Before they could enter, however, High Charity exited slipspace over Installation 05, along with the hundreds of warships of the High Charity defense fleet and the Second Fleet of Homogeneous Clarity. Responding to a distress signal from Regret, Special Operations Commander Rtas 'Vadumee moved to reinforce the temple by Phantom dropships in an urgent measure to defend the Hierarch. However, the Prophet of Truth stalled these Phantoms, in an attempt to allow Regret to be killed as part of his political plans for the Covenant.[16]

Inside the temple, a large contingent of Sangheili Honor Guardsmen and Unggoy defended the Prophet. Cortana detected a wave of Phantoms too large to measure en-route to the temple, indicating to the Spartan time was running short. John-117 was able to board the Regret's gravity throne and dispatch the frail San'Shyuum with his fist. The Prophet's guards quickly began to empty the temple, and Cortana detected the incoming Phantoms changing course, heading away from the temple. Shortly thereafter, Solemn Penance positioned itself over the main temple, and fired upon the structure with its energy projector at the order of the Prophet of Truth.[17] With not enough time for airborne evac, John leapt into the lake to evade the glassing beam. Here, he was soon grasped by the tentacles of the Gravemind, a Flood compound intelligence, and taken prisoner.[15]

The Containment Shield[edit]

Main article: Battle of the Quarantine Zone
Tartarus's Phantom nears the containment shield to deploy the Arbiter.

A short time earlier, Commander Keyes received a transmission from Cortana indicating they were aboard the final Gondola and approaching Regret's temple. The In Amber Clad had discovered that Installation 05's Library was surrounded by a containment shield—an impenetrable energy shield projected by a large wall-like Forerunner structure. After failing to find a way around the barrier, the Frigate deployed a platoon-sized force of Marines to the wall led by Gunnery Sergeant Marcus Stacker and Staff Sergeant Banks. The Marines moved through the outer wall with ease, unmolested by local Sentinel defenses - likely due to being recognized by the automated guardians as Reclaimers.[16]

Aboard High Charity, Regret's death had major political upheaval, as the Sangheili were punished by their failure to protect the Prophet of Regret. The Jiralhanae were assigned to replace them as Honor Guards, and Chieftain of the Jiralhanae Tartarus was given to the task of retrieving the Index from the Library. Tartarus sent numerous waves of Jiralhanae-led Covenant infantry to storm the Sentinel Wall, however after all failed to breach the outer wall, Thel 'Vadamee, the Arbiter of the Covenant, was personally ordered by the Prophets Truth and Mercy to journey to the surface of the ring and retrieve the Sacred Icon.

Dropped directly to the wall by Tartarus' personal Phantom transport, the Arbiter encountered a small number of surviving Unggoy and Kig-Yar from the earlier assault. After battling through numerous Forerunner constructs to reach the control center for the Containment Shield, the Arbiter deactivated the shield, boarding a gondola to exit the outer wall. The inner wall quickly became overrun with Flood from the nearby Quarantine Zone it was designed to contain, and the UNSC platoon was caught unprepared.

Spread throughout the wall in small fireteams and completely unaware of the nature of enemy they were facing, most of the platoon was quickly assimilated by the parasite, proceeding to take up arms against their former comrades. Additionally, the local Sentinel forces became hostile to the surviving Marines, likely due to the immediate presence of the Flood. With his forces decimated, but the Containment Shield now disabled, Stacker radioed In Amber Clad suggesting Keyes proceed straight to the Library while his troops attempted to hold their position. A short time later, Stacker made contact with Keyes once again, confirming their engagement with non-Covenant hostile lifeforms, while Banks and other Marine survivors could be heard staging a desperate defense.[16]

As 'Vadamee exited the outer wall, Tartarus' Phantom was driven off by a Sentinel Enforcer, forcing the Arbiter to travel through the now-flood infested inner-wall.[18] The Arbiter battled infected Marines, Sentinels and even encountered two surviving UNSC fireteams as he made his way towards the base of the structure.

Battle of the Quarantine Zone[edit]

Main article: Battle of the Quarantine Zone

"We shall cut into the heart of this infestation, retrieve the icon, and burn any Flood that stand in our way! Forward, warriors, and fear not pain or death!"
— Rtas 'Vadumee[19]
Rtas 'Vadumee rallies his Sangheili to battle.

The Quarantine Zone was intended to be a location where the Sentinel custodians of the installation could herd the Flood, and prevent them from entering the Library. Two Sentinel manufacturing facility ships hung in the air, deploying Sentinel reinforcements.[20] However, the Quarantine Zone was compromised by the Flood, and the Flood managed to crash one of the floating facilities using a Zurdo-pattern Wraith, sending it plummeting down to the installation's surface.[16]

The Arbiter met with Commander Rtas 'Vadumee and two other Sangheili just outside of the Sentinel wall, and together, they defended a small hill from the Flood before pushing inwards, where the Special Operations Commander had established a small outpost.[16] There, the Special Operations force held out against waves of Flood attacks from the cliffs before they were reinforced by a pair of Phantoms that dropped off a Wuzum-pattern Spectre and a pair of Karo'etba-pattern Ghosts. The Covenant were able to use these vehicles to advance through a large indoor Forerunner facility before entering the first of a series of expansive outdoor arctic canyons. Despite the prowess of the Special Operations Sangheili and the Arbiter, the UNSC were swifter to advance through the Quarantine Zone—In Amber Clad deployed a Pelican dropship that cruised above the battling Flood and Sentinels, cutting directly towards the Library while the Arbiter and his men were forced to fight through waves of Flood, including Flood and the vehicles they had commandeered, while all the while, Enforcers rained heavy fire.[19]

The small Covenant task force was forced to debark from its vehicles as they transgressed the wreckage of one of the Sentinel constructor factories, although just beyond the wreckage on the other side, they were met by another Covenant Phantom, this one dropping off a Spectre manned by Rtas 'Vadumee himself and another Special Operations Sangheili. However, as they progressed through the last series of snowy plains, they were met with increasingly heavy resistance as they neared the Library. The Sentinels were in much larger force, while a large number of Flood-infested humans savagely held a barricade against the Library, using crates, turrets, and heavy weapons to prevent anyone to gain entrance to the Library and retrieve the index, which would eventually lead to the extermination of the Flood.[19]

The Library[edit]

The Library of Installation 05 situated deep inside the Quarantine Zone.

"The release of the parasite was unexpected, unfortunate. But, there is no need to panic. In truth, this is a time to rejoice. A moment that all the Covenant should savor... for the Sacred Icon has been found. With it, our path is clear, our entry into the Divine Beyond guaranteed! The Great Journey is nigh... and nothing, not even the Flood, can stop it!"
— Prophet of Truth[5]

A small UNSC Marine force led by Miranda Keyes and Avery Johnson was able to slip past the Flood infestation into the Library, followed shortly by the Arbiter, Rtas 'Vadumee, and half a dozen Special Operations Sangheili. There were a pair of anti-gravity gondolas, that when activated, autonomously brought their passengers into the upper tiers of the Library, where the index was kept. While the UNSC was first able to seize a gondola, the Covenant were close behind. However, when the Flood began to screech, alerting the Covenant that they were in full force in the bowels of the Library, Rtas 'Vadumee took a pair of Special Operations Sangheili, holding them at the entrance to the gondolas to defend the rest from the Flood as the Arbiter took four Special Operations Sangheili on the second gondola, trailing behind the UNSC-held one. Flood entered the gondolas, jumping from the upper levels and also crawling in underneath on their undersides, assailing both the UNSC troops and the Sangheili forces. Tartarus, in his Phantom, attempted to provide cover fire for the Arbiter, using the three plasma cannons of his dropship to burn off any Flood on the upper levels of the Arbiter's gondola, but later, Tartarus chased after the UNSC-held gondola.[19]

Miranda Keyes stretches over a chasm in the Library, securing the index.

Finally, both gondolas ascended to the top levels of the Library, although the UNSC one arrived first, and a small UNSC force of six soldiers, led by Miranda Keyes and Avery Johnson, entered. Although many Flood combat forms had been exhausted in the Gravemind's last-ditch attempt to stave off the gondolas, there were a large number of Pod infectors prowling the Library which killed off the four UNSC Marines as Keyes and Johnson advanced towards the core of the Library. Meanwhile, the Arbiter silently snuck in behind them. Miranda managed to grab the index over a seemingly endless chasm. Once Keyes and Johnson had the index, they were ambushed by Thel 'Vadamee. Johnson was knocked unconscious by the Arbiter, but Keyes was able to take down Arbiter's shields by firing at him with an M7 SMG. However, Tartarus entered with four of his Jiralhanae Captains. Tartarus used the Fist of Rukt to stun Miranda and gravitationally levitate her towards him, draping her over his shoulder and then clasping the index and securing it for himself. Tartarus informed Thel about the Jiralhanae's intended genocide of the increasingly incompetent Sangheili, an act sanctioned by the High Prophets themselves. The Chieftain then knocked the stunned Arbiter into a pit leading to the depths of Installation 05, initiating the Great Schism.[19]

The Prophet of Truth announces the retrieval of Installation 05's activation index.

The engagement at the Library proved to be devastating to the UNSC and resulted in the loss of In Amber Clad as the Flood took over the frigate. Meanwhile, Tartarus brought the Sacred Icon to High Charity, where the Prophet of Truth exulted him and encouraged the Covenant to celebrate, for the Sacred Icon was secure, and that soon afterward, the Halos would be fired and the Great Journey would be brought upon the Covenant.[5]

The Great Schism[edit]

Main article: Great Schism
The Gravemind explains Halo's purpose to John-117 and Arbiter Thel 'Vadamee.
The Gravemind speaks to the Arbiter and John-117 in the depths of Installation 05.

"The Elites have failed to protect the Prophets, and in doing so, have put all our lives at risk. Let no warrior forget his oath, 'Thou, in faith, shall keep us safe, whilst we find the Path'. With my blessing, the Brutes now lead our fleets! They ask for your allegiance, and you shall give it."
— Prophet of Truth[5]

The Covenant would not activate the Halos unimpeded. The Flood, who would be starved if the rings were activated, would soon attack the Covenant to prevent the activation, and the UNSC, who understood that all sentient life would be erased, also opposed the Covenant. Later, after the fragmentation of the Covenant into the Sangheili-dominated faction and the Prophet-led Covenant, the Sangheili would understand the true purpose of Halo and attack the Covenant to prevent them from activating the ringworld. Meanwhile, John-117, who had fallen into the lake, and the Arbiter, who had been thrust into the chasm of the Library, were both caught by the tentacles of the Gravemind, along with the assimilated Prophet of Regret and 2401 Penitent Tangent, the monitor of Installation 05. The Gravemind sent the Arbiter and John-117 to aid in his plan to prevent the activation of Installation 05, manipulating the Halo's teleportation grid to send John-117 to High Charity to search for the index, and sending the Arbiter to the cliffs just beyond the Control Room, another likely spot.[5]

The Covenant's betrayal of the Sangheili led to a large-scale civil war on High Charity. The Covenant politico-military fractures were not restricted to High Charity: they extended to military units across the Covenant, including those on the surface of Installation 05. Upon Truth's order that the Jiralhanae were now the ruling caste of the Covenant, Tartarus ordered the execution of the Sangheili Councilors, who had been gathered in the Control Room of Installation 05 for the consecration of the Sacred Icon before the Halos were fired. Councilors gathered in the Control Room were murdered in cold blood by Jiralhanae led by Captain Melchus,[21] while others in the region surrounding the Control Room were attacked and killed by Avitus and his Jiralhanae.[22][23] Avitus also took Councilor Raas 'Yajadai captive, holding him at the Bastion of the Brutes.[24]

Rtas and Thel meet again, preparing to avenge the Councilors.

However, the Sangheili were quick to strike back. The Gravemind teleported the Arbiter to a high cliff near the Control Room, and gave him an objective: to prevent Tartarus from using the Sacred Icon and activating Halo, which would not result in the promised sublimation event of the Prophets, but only death and destruction on a galactic scale.[25] The Arbiter arrived just too late, witnessing the aftermath of the battle between the Jiralhanae and 'Yajadai's Sangheili entourage.[24] He pushed forward against a number of patrolling Jiralhanae, and meet up with a number of surviving Sangheili warriors. The small group of survivors, led by the Arbiter, pushed northward through a large Jiralhanae-held Forerunner structure, unpinning small groups of scattered loyal Unggoy and killing dozens of Jiralhanae, Kig-Yar, and Yanme'e. Afterward, they emerged from the structure, and fought their way past several Jiralhanae camps, commandeering several Ghosts along the way. As they neared another cluster of structures, they encountered heavier resistance in the form of Jiralhanae-controlled Wraiths. The Arbiter and his Sangheili allies managed to defeat the Jiralhanae and secure a landing zone, allowing for additional Sangheili reinforcements to arrive.[25]

After securing the first half of the camp, the Arbiter and his allies moved into the weapons cache, where the Jiralhanae had aggregated a large number of Covenant and UNSC weapons alike. The Arbiter led his group outside the structure and into a tunnel and defeated the Jiralhanae within. After exiting the tunnel, the Arbiter met with Rtas 'Vadumee who was commandeering a Wraith.[25]

Fall of High Charity[edit]

Main article: Fall of High Charity
Sangheili and Jiralhanae vessels battle over High Charity and Delta Halo

"Now is the time of our unworlding, in a moment we shall all become...as gods. If you will falter, know this...one final effort is all that remains."
— The Prophet of Truth inspiring his loyalists to defeat the Flood on High Charity

John-117 was teleported by the Gravemind directly into the High Council Chamber of High Charity, where the Prophets of Truth and Mercy addressed the Covenant that the Sacred Icon was secure. Before the Spartan could kill both Prophets, they escaped by means of an elevator, while the doors were locked and waves of Jiralhanae Honor Guardsmen, Jiralhanae Minors, and Unggoy entered in an attempt to kill the supersoldier. Cortana managed to unlock the doors, and John-117 chased through two towers and a set of corridors in pursuit of Truth and Mercy. However, Cortana had discovered Marines that were being kept prisoner on High Charity and John-117 freed them. Truth's transmissions to the rest of the Covenant allowed Cortana to triangulate his position, allowing her to direct John-117 and the Marines in their hunt for the Prophet. The Covenant attempted to stop Cortana, but were unsuccessful.[5]

As John-117 and the Marines reached Hanging Gardens A, the first scene of Covenant fratricide was seen, as Sangheili Honor Guards, Sangheili Minors, Mgalekgolo, and Unggoy fought against Jiralhanae and Kig-Yar Snipers amongst the massive plants. John-117 and his men advanced to the Mid Tower, where Rangers and Special Operations Sangheili entered the fray, and numerous Yanme'e entered the engagement. During the fight, the Flood-controlled In Amber Clad then jumped directly into High Charity, where it plummeted uncontrollably, crashing into the Far Tower. However, by the time that the small UNSC squad entered Hanging Gardens B, Sangheili resistance on High Charity had broken. In the second Hanging Gardens, the Sangheili and those loyal to them fell back, leaving behind large numbers of stationary shield generators, abandoning numbers of Unggoy to berserk Jiralhanae as the Sangheili fell back to the Far Tower and the Mausoleum of the Arbiter, drawing a last line of defense there. Despite their efforts, the Prophets of Truth and Mercy, Tartarus, and a handful of Jiralhanae Captains were able to tunnel through the last Sangheili defenses to the far docking bays of the Far Tower.[26] John-117 pursued Tartarus, fighting through the Far Tower and the Mausoleum of the Arbiter to make it through to the landing pads.[5][27]

"The Great Journey waits for no one, brother... not even you."
— Truth betraying Mercy
The Prophet of Mercy is killed by the Flood.

The Spartan was too late, however. The Prophet of Truth ordered Tartarus to deliver the activation index to the Control Room of Installation 05, and activate the Halos. Tartarus took a detachment of Jiralhanae Honor Guards along with him in two Phantoms, along with UNSC prisoners Avery Johnson and Miranda Keyes. Truth took a third Phantom to the Forerunner Dreadnought—the central energy source of High Charity, and also a fully functional Forerunner keyship that the two remaining High Prophets were going to use to reach Earth, and finish the battle. Meanwhile, the Flood were escaping from the crashed hulk of In Amber Clad. They seeped out of the rents in its hull armor and commandeered its Pelican dropships, sending them over the surface of High Charity, crashing into the floors and releasing combat forms, and spilling Pod infectors out of the air from opened hatches. The Prophet of Mercy was beset by a Pod infector and died before he could reach his Phantom. However, Tartarus and Truth were able to depart before John-117 could arrive.[5]

Cortana watches the keyship lift off from High Charity for Earth

Cortana: "Chief, when you get to Earth...good luck."
John-117: "After I'm through with Truth..."
Cortana: "Don't make a girl a promise...if you know you can't keep it."
— Cortana to John-117 before he departed to kill Truth and stop his invasion at Earth

By that time, resistance by the Sangheili and their allies had completely shattered on High Charity. There were few Sangheili or Mgalekgolo remaining, and only a few scattered Unggoy. The forces loyal to the Prophets, however, retained a large number of Jiralhanae, Kig-Yar, and Yanme'e. Despite the lack of a Sangheili ground force, they were still very much present in space, where the Covenant fleets over High Charity had splintered in allegiances, with Sangheili and Jiralhanae ships actively engaging and destroying each other. While Truth was taking a Phantom to the Forerunner ship, Cortana detected an energy conduit to the ship located in the Mausoleum tower ahead of John-117's position. John-117 entered the Mausoleum tower from the dropship landing pads, and engaged numerous Flood and Covenant hostiles. The Spartan eventually took a gravity lift to access the Sanctum of the Hierarchs. While John engaged Covenant forces, large numbers of Flood began to attack and the Spartan was forced to enter the energy conduit to reach the Forerunner ship. John-117 was able to jump in the conduit just in time, barely making it to the ship before it lifted off for Earth. However, Cortana stayed behind while John would attempt to neutralize the ship before it rallied the Covenant fleets at Earth. In the event that Tartarus was about to trigger the Halo Array, Cortana announced that she would detonate the fusion reactors of In Amber Clad—just like she had done to the UNSC Pillar of Autumn at Installation 04—and the blast would destabilize the ring and prevent the activation of the Halos.[28]

Shortly afterward, all Covenant resistance on High Charity broke and succumbed to the Flood, who had infested a large area of the planetoid even during the raging combat between the Covenant and the Flood. Cortana, who resided in High Charity's computer systems to be ready to detonate the frigate's reactors as a final fail-safe, was captured and interrogated by the Gravemind.[29]

Assault on the Bastion of the Brutes[edit]

Avery Johnson controlling a Scarab before the Arbiter.

"Listen, you don't like me and I sure as hell don't like you. But if we don't do something, Mr. Mohawk's gonna activate this ring. And we're all gonna die."
— Avery Johnson to Thel 'Vadamee

Meanwhile, Rtas 'Vadumee informed the Arbiter that Tartarus was within the Control Room, and would soon be activating the Halos. However, the doors to the Control Room were nearly completely impenetrable, and would only be opened by the firing of the main cannon of a Protos-pattern Scarab walker. Fortunately, a Scarab was available at the Bastion of the Brutes, a Forerunner structure used by the Jiralhanae as their local base of operations.[25][29]

The battle for Installation 05's control room.

While Rtas 'Vadumee advanced forward in a Wraith tank, the Arbiter and another Special Operations Sangheili took a Spectre, and together, the Sangheili battled through a swarm of Ghosts, several Wraiths, and a bombarding Phantom. Eventually, the Sangheili secured entrance into the Bastion of the Brutes, where the Arbiter found another Special Operations Sangheili and a pair of Mgalekgolo, all of whom were loyal to the Sangheili. Meanwhile, Rtas 'Vadumee said that he would briefly watch the Arbiter's back, and would prevent any Jiralhanae reinforcements from entering in behind them while they cleared out the stronghold. Later, he announced that he would retake the Ket-pattern battlecruiser that was hanging in the distance. The Arbiter and his band of Sangheili and Mgalekgolo stormed the Bastion, fighting their way past Jiralhanae, Kig-Yar, Yanme'e, and even a Phantom. Eventually, they freed imprisoned Councilors — including Raas 'Yajadai — and Mgalekgolo and eventually reached the platform where the Scarab was docked. Much to their surprise, they discovered the presence of humans who were being held prisoner by the Jiralhanae. Amongst the prisoners was Sergeant Avery Johnson. The Jiralhanae had just received orders from Tartarus to execute the prisoners, when the Arbiter and his followers attacked. The humans, with the help of their Sangheili allies-to-be, took advantage of this distraction to free themselves and take control of the Scarab.[29]

After all the Jiralhanae on the platform were dead, there was a brief standoff between the Sangheili and the UNSC personnel. However, both the Arbiter and Sergeant Johnson realized that they shared a common enemy and objective. The two sides begrudgingly joined forces and set out to stop Tartarus from activating Halo.[29]

The Control Room[edit]

Thel 'Vadam battles against Tartarus.

"No Arbiter! The Great Journey has begun, and the Brutes, not the Elites, shall be the Prophets' escort!"
— Tartarus to Thel 'Vadamee

The Arbiter took possession of a Banshee and provided cover fire for Johnson's Scarab. Together, they fought their way past a large Jiralhanae force consisting of multiple Wraiths, Banshees, Spectres, and Shade turrets. Eventually, the group reached the Control Room and destroyed its doors with the Scarab's primary cannon. Inside the chamber, the Arbiter fought his way through numerous Jiralhanae forces who had been ordered to prevent the Arbiter from disturbing Tartarus while he activated the Halos. Despite reinforcements, the high-ranked Jiralhanae were unable to hold the room, and the Arbiter continued down an arched corridor before confronting Tartarus in the control room. Inside, he found Tartarus and several Jiralhanae, along with two prisoners—Miranda Keyes and 343 Guilty Spark who had been captured by the Covenant during the raid on the Threshold gas mine.[29]

Tartarus had been trying to force Keyes to insert the index into its place, as only a Reclaimer could activate Halo. The Arbiter entered the control room and told the Chieftain to stand down. Tartarus refused, and his Jiralhanae were about to attack the Arbiter, when Johnson suddenly appeared, pointing a Type-50 particle beam rifle at Tartarus' head. Seeing that he was in danger, Tartarus ordered his Jiralhanae to hold back for the moment. The Arbiter then had Guilty Spark explain that the Halos were weapons of mass destruction, built by the Forerunners as a last resort means to stop the Flood. Spark further revealed the Forerunners ultimately perished when they activated the Halo Array, sacrificing themselves to contain the Flood. Despite Guilty Spark's revelations, Tartarus — blinded by his loyalty to the Prophets and his hatred for the Sangheili — refused to listen. The Chieftain threw Guilty Spark at Johnson, knocking him out for a moment. He then physically forced the Sacred Icon into Miranda Keyes' hand and shoved it into the receptacle, beginning the activation of Installation 05. Miranda jumped out of the way of the imminent firefight as the Arbiter, the conscious Johnson, and a small cluster of recently-arrived Sangheili Zealots and Councilors, charged at Tartarus and his guard of four Jiralhanae Captains. The Jiralhanae guards were quickly slain, and Tartarus retreated onto the three-level structure at the center of the control room. When the Arbiter and his allied Zealots and Councilors pursued, they found to their dismay that Tartarus was protected by a nearly impenetrable energy shield. Only Sergeant Johnson, with his particle beam rifle, could disable Tartarus' shields, and only for a few seconds.[29]

Meanwhile, Miranda Keyes argued with Guilty Spark and eventually forced him to reveal that the firing sequence could be stopped if the Reclaimer simply removed the index from the its position. However, she could not do anything while Tartarus was still alive. The Arbiter and Sangheili battled Tartarus, who used his massive gravity hammer, the Fist of Rukt, to slay many high-ranking Sangheili. Eventually, the Arbiter succeeded in killing Tartarus. Commander Keyes immediately leapt to action after Tartarus died, snatching the index from the control panel. Despite the fact that Installation 05 was primed to fire, the removal of the index only triggered a partial firing, one that was inconsequential and led to the loss of no life whatsoever. However, 343 Guilty Spark informed them that because of the partial activation of Installation 05, the other five remaining installations were set onto standby mode, and were ready to fire upon command from a central Forerunner installation: the Ark.[29]

Final space battle[edit]

Despite the isolated Sangheili ground victory on Installation 05, there was a much greater threat: the Flood. Having assumed dominance over the whole of High Charity and certain locations on Installation 05, they tried boldly expanding into space, attempting to take over Covenant warships. The ambitious Sangheili Major Voro 'Mantakree assumed command of the Varric-pattern heavy cruiser Incorruptible after mutinying against and killing his insane commander, Tano 'Inanraree,[30] and audaciously sent a fleetwide dispatch to the idling Covenant fleet amassed over High Charity: the Flood were lifting off from Installation 05 in Dextro Xur-pattern Spirit dropships and Banshees, and were attempting to attack and take control of Covenant warships to spread throughout the galaxy. The fleets were united after the transmission, and four Covenant destroyers, including the Rapturous Arc, that were about to be consumed by the Flood were burned and destroyed to prevent the parasite from capturing the warships.[31]

Shortly afterward, however, the fleets splintered without a common foe. The Jiralhanae Chieftain Gargantum attempted to coordinate a Jiralhanae uprising against the Sangheili, and chased after 'Mantakree with four Covenant frigates. Using deft tactics and maneuvering out the Sangheili carrier Lawgiver, the Incorruptible destroyed the Jiralhanae-controlled frigate Tenebrous, although the three remaining frigates, including Gargantum's personal frigate, the Twilight Compunction, continued pursuing him. Soon afterward, the entire Covenant fleet began turning on itself, following Gargantum's example. The UNSC Dusk, one of the five UNSC ships originally sent to tail Solemn Penance, witnessed the massive encounter as Covenant ships turned upon one another and destroyed themselves in a civil war.[32]

However, Incorruptible did not continue in the orbital battle, as a revered Sangheili fleet commander, Imperial Admiral Xytan 'Jar Wattinree, urged all Sangheili to regroup over the outpost world Joyous Exultation of the Salia system. 'Mantakree obediently left the battle, entering slipspace towards Joyous Exultation. During the pursuit, SPARTAN-II Blue Team dropped in the midst of the chase as the Incorruptible prepared to leave the system, in their captured Covenant destroyer, Bloodied Spirit. Gargantum was incensed that heretic "Demons" had seized a Covenant warship, and diverted one of the three pursuit frigates from the Incorruptible to the Bloodied Spirit. The frigate managed to lower the UNSC-controlled destroyer's shields before the SPARTAN-IIs jumped to slipspace for the Zeta Doradus system. The Sangheili defeated the Jiralhanae fleet and subsequently held High Charity in quarantine.[33] However, this largely failed, due to the Gravemind sending the Indulgence of Conviction, controlled by the Flood, to Earth, in the hopes of infecting it and weakening the Sangheili ships in orbit around the Flood hive. This was successful and the Gravemind was able to leave Installation 05's space and find the Ark.[34]

Aftermath[edit]

343 Guilty Spark informs the Arbiter, Johnson, and Keyes about the Ark.

The battle at Installation 05 was extremely costly with significant political-military consequences for the Covenant and remarkable ramifications for all sentient life in the galaxy. Thousands of Covenant forces were slain in John-117's mission to kill the Prophet of Regret,[15] the race to acquire the activation index from the Control Room, and the massive ground and orbital battles that took place on Installation 05, High Charity, and between the Covenant fleets orbiting over Substance because of the Great Schism.[32]

UNSC losses were remarkably lower because of the small number of forces they brought into the theater of operations, almost solely the crew and soldiers of UNSC In Amber Clad. Hundreds of Marines and Orbital Drop Shock Troopers, however, were lost in UNSC ground operations: the assassination of Regret and the storming of the Quarantine Zone. A large number were also infected by the Flood and made continual appearances as combat forms in the Sentinel wall, Quarantine Zone, and Flood-infested High Charity.[5] The crewmen of the In Amber Clad were presumably killed and reanimated by the Flood as well. However, the UNSC suffered the least amongst the four warring factions in the Battle of Installation 05. In many ways, Installation 05 was the true turning point in the Human-Covenant War. In the long term, the political chaos wrought throughout the battle would shatter the Covenant into warring factions. The Sangheili eventually allied themselves with their human enemies, bolstering their fleets and taking their military expertise away from the Covenant. The immediate loss of High Charity and the majority of its enormous defense fleet drastically reduced the threat of the Covenant to human space. While still dangerous, the Covenant forces loyal to the Prophets ultimately proved incapable of defending themselves over the last few weeks of the war.[35]

Sentinel defenses were completely trampled over, particularly in the Quarantine Zone, where within hours, the Flood had managed to infiltrate the well-defended Sentinel wall and seize control of large tracts of the Quarantine Zone, even grounding an airborne Sentinel manufacturing facility.[16] The Flood also permeated the Library and the surrounding grounds, eliminating almost all Sentinels from the skies, leaving only scattered Enforcers to do battle with them. The Flood also controlled UNSC and Covenant vehicles alike, reinforcing their considerable ranks with M808B Scorpion tanks, M12 Chaingun Warthogs, Zurdo-pattern Wraith tanks, and Karo'etba-pattern Ghost assault vehicles. Flood losses were initially high because of the Arbiter's actions in the Quarantine Zone and John-117's on High Charity. However, it was inconsequential: the Flood scored a notable victory on High Charity, capturing the Covenant's mobile home planetoid and transforming the structure into a Flood hive.[28]

Fragmentation of the Covenant[edit]

Kig-Yar and Unggoy protesting on High Charity

The Covenant was fractured, with the Sangheili rallying those loyal to them against the San'Shyuum and Jiralhanae, who controlled the military of the Prophet-led Covenant against the Sangheili and their allies. Many San'Shyuum were killed in the battle, either during the Flood's infestation of High Charity, or on Installation 05 as many Ministers and Prophets travelled to the ring to examine it for themselves, which effectively led to the near extinction of the San'Shyuum. To make matters worse for the species, those who did not die during the Flood invasion on High Charity were reluctantly forced to stay on the Covenant capital by Rtas 'Vadum and the Fleet of Retribution's quarantine, due to the danger the Flood posed in case they infected a San'Shyuum-led ship and spread through the galaxy. However, there were San'Shyuum who managed to escape with their ships before 'Vadum discovered the Flood's presence on the city.[36] The Prophets' betrayal of the Sangheili led to the divide of the Covenant species. Many Mgalekgolo allied themselves with the Sangheili, the Unggoy and Huragok followed their commanders, most Yanme'e joined the Jiralhanae and the Kig-Yar aligned themselves with whoever would lead them to profit.[37]

The Covenant ruling system was destabilized, with the death of the Prophet of Regret on Installation 05 at the hands of John-117 and the death of the Prophet of Mercy on High Charity due to Flood infestation.[5][15] The Prophet of Truth held dictatorial power, with several subservient Minor Prophets, completely re-shifting the political dynamics of the Covenant. The Jiralhanae held reign over the majority of the Covenant military, bringing their innate tenaciousness and ferocity to the front lines quite unlike the Sangheili. The Jiralhanae also assumed more lower-level Covenant military authority, now replacing the Sangheili as the leaders of field squads and teams. The Jiralhanae also introduced a unique set of bloodthirsty weaponry into the Covenant's field arsenals. The Covenant fleet was believed to lose quite a bit of its technical proficiency without the innate technical knowledge of the Sangheili.[38]

Return to Earth[edit]

The Forerunner ship approaching a besieged Earth as the UNSC Home Fleet continues to fight against Covenant fleets.

Terrence Hood: "Master Chief? Mind telling me what you're doing on that ship?"
John-117: "Sir. Finishing this fight."
— Admiral Terrence Hood and John-117[29]

In the end, the fates of the Covenant fleets over High Charity is unknown, although at least one Covenant vessel, the Incorruptible, escaped. 'Matrankee was commended for his actions against the Flood on Installation 05, and was promoted to Fleet Master.[39] The Flood continued to attempt to escape High Charity in Covenant starships, and a fleet led by Rtas 'Vadum on the Shadow of Intent held the line against the Flood. However, the Flood managed to infest at least one Sangheili-controlled ship, the Indulgence of Conviction, a Ket-pattern battlecruiser, and made a slipspace jump to Earth to attempt to infest the human homeworld. The Sangheili fleet in orbit over High Charity followed the Flood-controlled cruiser, and when the Flood ship crash-landed on Earth, Rtas 'Vadum and his forces aided the UNSC Home Fleet in destroying the Flood vessel and terminating the Flood spread across the planet. However, prior to this, High Charity had already left its orbit around Installation 05, and according to a scrambled distress signal from Cortana, was already on its way to Earth to enter the Portal.[34] It was indicated though that all of the other Flood-controlled ships were destroyed though: upon landing on Earth a Sangheili informed the Arbiter that the Sangheili's fleet had taken care of all of the Flood-controlled ships, except for the one which had managed to break through and jump to Earth. It can be inferred that the Flood-controlled ships were ultimately all destroyed except the one intercepted on Earth and High Charity which was later destroyed by the Master Chief in the Battle of Installation 00. Cortana was left to the clutches of the Gravemind. It was later shown that she answered a few questions to buy herself some time and used the opportunity to help find a way to destroy the Flood. She would later be rescued by the Master Chief who would then destroy High Charity during the Raid on High Charity.[40]

John-117 was aboard Truth's Forerunner Dreadnought, which managed to reach Earth unharmed and landed in Africa, near the Portal to the Ark, about two weeks after its departure from High Charity.[41] UNSC Dusk eventually withdrew to rendezvous with Admiral Patterson's battlegroup outside of the Zeta Doradus system,[42] and the UNSC In Amber Clad remained crashed into one of the towers of High Charity.

Timeline[edit]

October 20, 2552

November 2, 2552

November 3, 2552

  • Arbiter Thel 'Vadamee is sent to retrieve Installation 05's activation index, supported by Tartarus in a Phantom. He successfully fights through the outer Sentinel Wall and deactivates the Containment Shield.
  • Flood overrun the inner wall, infecting the majority of the UNSC platoon.
  • Sergeant Stacker recommends Commander Keyes proceed directly to the Library, Marine survivors hold position within the inner wall. In Amber Clad takes position over the Library, and begins to deploy it's full strength into the central Quarantine Zone via Pelican.
  • Covenant Spec-Ops forces are deployed into the outskirts of the Quarantine Zone, unaware of the mission to retrieve the index.
  • A Sentinel Manufacturing facility over the Quarantine Zone is shot down by flood-controlled Wraiths, captured from the recently deployed Covenant forces. Thel 'Vadamee exits the Sentinel Wall and rendezvous with Rtas 'Vadumee. The Arbiter leads Spec Ops forces in a push towards the Library.
  • Keyes, Johnson and a Marine squad enter a facility containing gondolas leading to the Library. The Marine forces defending the facility are overrun by Flood.
  • The Arbiter and Rtas 'Vadumee break through the Flood and enter the facility, boarding a gondola seconds after observing a UNSC-controlled one depart.
  • Keyes and Johnson secure the Index, however are ambushed by the Arbiter. The Arbiter is interrupted by Tartarus, who seizes the Index and propels 'Vadamee into a hole in the center of the room, having been ordered to do so by the Prophet of Truth.[19]
  • Most of the Sangheili Councilors are taken to the Control Room of Installation 05 for the "consecration of the Sacred Icon" however they are murdered by the Jiralhanae.[25]
  • The Prophet of Truth transfers command of the Covenant military to the Jiralhanae, while Tartarus declares war on the Sangheili, and the Fall of High Charity begins. Fighting between Sangheili and Jiralhanae forces breaks out all over High Charity. As word spreads, fighting takes place throughout the fleet, as Sangheili and Jiralhanae controlled ships attack one another.[5]
  • The Flood invade High Charity during the battle, entering the city's dome via precision slipspace jump aboard In Amber Clad and its embarked Pelicans. The Prophet of Mercy is attacked by an Pod infector and abandoned by the Prophet of Truth, who boards the Fore runner Dreadnought, and sends Tartarus to the Control Room with orders to activate the Installation.[5]
  • High Charity swiftly falls to the Flood, however Truth is prevented from departing as UNSC AI Cortana is able to delay the Dreadnought's launch sequence. Tartarus arrives at the Control Room with Miranda Keyes in tow. Thel 'Vadamee and Rtas 'Vadumee formulate a plan to capture a Jiralhanae-controlled Scarab and break into the Control Room to stop Tartarus. 'Vadumee leaves to gather a strike team with which to capture the nearby Shadow of Intent.
  • The Flood takes control of High Charity and many of its warships. Jiralhanae and Sangheili fleets remaining around the city-station continue to destroy each other.The Prophet of Truth departs High Charity for Earth aboard the Forerunner Dreadnought, to join the Battle of Earth, with John-117 aboard.[29]
  • Tartarus orders captive Sergeants Johnson, Stacker and Banks executed, however The Arbiter and other Sangheili interrupt the execution, allowing Johnson to commandeer the nearby Scarab. Johnson and the Arbiter forge a hasty alliance and use the Scarab to destroy the doors to the Control Room.
  • Tartarus attempts to activate Installation 05 are interrupted by the arriving Johnson and 'Vadamee. After the Arbiter attempts to convince him of the ring's real purpose, Tartarus activates the Ring by forcing Commander Miranda Keyes to insert the Index into the Control Room's Core.[29]
  • Thel 'Vadamee, with the aid of Sergeant Johnson and multiple Sangheili Zealots and Councillors, kills Tartarus.[29]
  • Commander Keyes aborts the activation of Installation 05, placing the entire Halo Array on standby status. 343 Guilty Spark reveals the existence of the Ark.[29]
  • The prowler Dusk witnesses the battle between Sangheili and Jiralhanae held ships above Delta Halo, both fighting each other pausing only to escalate an immediate outbreak of the Flood from the ringworld. Dusk subsequently flees the battle and links up with Patterson's battle group at Earth.[32]
  • Sangheili Major Voro 'Mantakree kills his shipmaster, Tano 'Inanraree, while he is attempting to allow the Flood to enter the ship. He then assumes command of the ship, Incorruptible, and becomes the de facto leader of the Second Fleet of Homogeneous Clarity. He leads his new forces to Joyous Exultation, pursued by the Jiralhanae Gargantum and his ships.[11]

November 4, 2552

Participants[edit]

UNSC[edit]

Personnel[edit]

Ships[edit]

Forerunner constructs[edit]

Flood[edit]

Sangheili-led forces[edit]

Personnel[edit]

Ships[edit]

Covenant[edit]

Personnel[edit]

Ships[edit]

Gallery[edit]

  • Covenant Shade turrets open fire on the inbound HEVs.

    Covenant Shade turrets open fire on the inbound HEVs.

  • ODSTs battling on Delta Halo in an early build of Halo 2: Anniversary.

    ODSTs battling on Delta Halo in an early build of Halo 2: Anniversary.

  • Cortana and John-117 learn that Regret plans to activate Installation 05.

    Cortana and John-117 learn that Regret plans to activate Installation 05.

  • Commander Keyes coordinates a plan with Cortana and John-117 to take the index from the Library.

    Commander Keyes coordinates a plan with Cortana and John-117 to take the index from the Library.

  • Guilty Spark projects an image of the "Sacred Icon" to Truth on High Charity.

    Guilty Spark projects an image of the "Sacred Icon" to Truth on High Charity.

  • Solemn Penance repositions over the temple in an attempt to kill John.

    Solemn Penance repositions over the temple in an attempt to kill John.

  • Tartarus' Phantom descends towards the surface of Installation 05.

    Tartarus' Phantom descends towards the surface of Installation 05.

  • The Arbiter readies himself before the insertion.

    The Arbiter readies himself before the insertion.

  • The Arbiter fights against a Forerunner Enforcer.

    The Arbiter fights against a Forerunner Enforcer.

  • The Arbiter and 'Vadumee plan to find the icon.

    The Arbiter and 'Vadumee plan to find the icon.

  • The two gondolas race to reach the top floors of the Library.

    The two gondolas race to reach the top floors of the Library.

  • Tartarus's Phantom hovers over the Arbiter's gondola, defending him from the Flood.

    Tartarus's Phantom hovers over the Arbiter's gondola, defending him from the Flood.

  • The Arbiter grabs Avery Johnson before knocking him unconscious.

    The Arbiter grabs Avery Johnson before knocking him unconscious.

  • Tartarus betrays the Arbiter.

    Tartarus betrays the Arbiter.

  • Cortana captured by the Gravemind at the heart of Flood-infested High Charity.

    Cortana captured by the Gravemind at the heart of Flood-infested High Charity.

  • Tartarus leads Miranda Keyes and 343 Guilty Spark deeper into the bowels of the Control Room.

    Tartarus leads Miranda Keyes and 343 Guilty Spark deeper into the bowels of the Control Room.

  • Tartarus preparing to attack.

    Tartarus preparing to attack.

  • Cortana, under the clutches of the Gravemind.

    Cortana, under the clutches of the Gravemind.

List of appearances[edit]

Sources[edit]

  1. ^ Halo: Shadow of Intent (Google Play edition), pages 46-47
  2. ^ a b c d e Halo 2, campaign level Delta Halo
  3. ^ Halo: Ghosts of Onyx, page 241
  4. ^ Halo 3, multiplayer map Cold Storage transmissions
  5. ^ a b c d e f g h i j k l Halo 2, campaign level Gravemind
  6. ^ a b Halo 2, campaign level Cairo Station
  7. ^ a b c Halo 2, campaign level Metropolis
  8. ^ Halo: Ghosts of Onyx, pages 185-186
  9. ^ Halo Waypoint: Delta Halo
  10. ^ Halo: Hunters in the Dark: Chapter 1
  11. ^ a b Halo: Ghosts of Onyx, page 189
  12. ^ Halo 3 Legendary Edition - Essentials, Disc Two - Halo 2 Cinematics Commentary
  13. ^ Halo 2 - Delta Halo, opening cutscene
  14. ^ Halo 2 campaign level Regret, opening cutscene
  15. ^ a b c d e f g h i j Halo 2, campaign level Regret
  16. ^ a b c d e f g h i j Halo 2, campaign level Sacred Icon
  17. ^ Halo: Age of Retribution
  18. ^ The Official Halo 2 Strategy Guide, page 115
  19. ^ a b c d e f Halo 2, campaign level Quarantine Zone
  20. ^ The Official Halo 2 Strategy Guide, page 122
  21. ^ Halo: Broken Circle, chapter 16
  22. ^ Halo 2: Anniversary, Terminal #12
  23. ^ Halo Waypoint, Great Journey Operation Launch: Image alt text "Halo 2: Anniversary Terminal screenshot of the Thrallslayer and a group of Jiralhanae standing over the corpses of Sangheili Councilors." (Retrieved on Nov 5, 2024) [archive]
  24. ^ a b Halo: Age of Retribution
  25. ^ a b c d e Halo 2, campaign level Uprising
  26. ^ The Official Halo 2 Strategy Guide, page 129
  27. ^ The Official Halo 2 Strategy Guide, page 128
  28. ^ a b Halo 2, campaign level, High Charity
  29. ^ a b c d e f g h i j k l Halo 2, campaign level The Great Journey
  30. ^ Halo: Ghosts of Onyx, page 192
  31. ^ Halo: Ghosts of Onyx, page 197
  32. ^ a b c Halo: Ghosts of Onyx, page 199
  33. ^ a b Eleventh Hour reports, Part 5
  34. ^ a b Halo 3, campaign level Floodgate
  35. ^ Halo 3, campaign level The Covenant
  36. ^ Halo: Shadow of Intent
  37. ^ Halo: Evolutions, "Wages of Sin", pages 300-301
  38. ^ Halo: Ghosts of Onyx, page 194
  39. ^ Halo: Ghosts of Onyx, page 243
  40. ^ Halo 3, campaign level Cortana
  41. ^ Halo 3, campaign level Tsavo Highway
  42. ^ Halo: Ghosts of Onyx, page 294

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⇦ Engagements in the Battle of Installation 05 ⇨

v • d • e
 
⇦ Battles of the Human-Covenant War ⇨
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Alpha Cephei (pre-2541) • HEMORRHAGE (pre-2552) • Odenli'sh (pre-2552) • DIRE MORNING • FANCY DRESS
Overarching campaigns
Outer Colonies (2525-2536) • Inner Colonies (2536-2552)
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