The Back Story Of Halo - Guide for Halo: Combat Evolved Anniversary

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Hey if you have not played halo BIG SPOILER. THIS TOOK ALONG TIME TO DO SO LIKE IT! 2160-2200 This 
period in human history was marked by a series of brutal conflicts between various governments and factions 
in our Solar System. Conflicts of particular historical importance included the Jovian Moons Campaign, The 
Rain Forest Wars, and a series of clashes on Mars. 

As overpopulation and political unrest on Earth increased, a number of new political movements formed. The 
most noteworthy dissident movements of the period were the "Koslovics" and the "Frieden" movement. The 
Koslovics—supporters of neo-Communist hardliner Vladimir Koslov—sought a return to the glory days of 
Communism and the elimination of corporate and capitalist influence, particularly in orbital facilities and 
offworld colonies. 

The Frieden movement was a resurgence of fascism, springing from anti-Koslovic sentiment that had taken 
root in the Jovian colonies (largely backed by Unified German Republic corporations, frequent targets of 
Koslovic "workers' crusades"). "Frieden" literally means "peace. " In this case, they believed that peace could 
be achieved only once the "oppressors on Terra Firma" were eliminated. 
2160 March-June: The Jovian Moons Campaign began. Jovian secessionist attacks on United Nations Colonial 
Advisors on the moon Io led to three months of fighting between the Earth military and Jovian "Frieden" 
forces. Though this was not the first armed conflict in our Solar System, it was easily one of the bloodiest, 
and is generally considered to be the spark of increased friction and militarization that followed. 

The Jovian Moons Campaign escalated tensions, as Earth's national governments-many of which sponsored 
colonies within the system-began fighting proxy wars off-planet. As these proxy wars continued, tensions on 
Earth mounted, leading to a number of armed conflicts on Earth itself. 
2162 The Rain Forest Wars: Armed conflict ripped through South America, as Koslovic, Frieden, and UN 
forces all clashed over ideological differences, sparking additional conflicts off-planet. 
2163 December: In a conflict that stemmed from the Rain Forest Wars, the three primary Earth factions 
clashed again, this time on Mars. A series of lightning strikes against Koslovic forces near the Argyre Planitia 
marked the first extra-terrestrial deployment of Marines. The campaign was an unqualified success. As a 
result, future military doctrine favored large contingents of Marines for ground assaults and ship-boarding 
actions. 
2164 UN-sponsored military forces begin a pattern of massive buildups, culminating in the first real 
interplanetary war. After the successful Marine deployment on Mars, recruitment drives and propaganda 
tactics strongly bolster UNSC (UN Space Command) forces. UN forces defeat Koslovic (supporters of rabid 
Communist hard-liner Vladimir Koslov) and Frieden (a resurgence of fascism) forces on Earth, then begin a 
systematic and dedicated drive to crush their remnants on the various planets they hold throughout the 
system. At the conclusion, Frieden and Koslovic forces are defeated, in the face of a massive, unified and 
very powerful UN military. 

The novel A Soldier's Tale: Rainforest Wars is first published, considered a classic military novel depicting the 
historical events that occurred during the Rain Forest Wars. 
2170 A unified Earth government was formed in the wake of the conflicts of 216. Now, the victors were 
forced to deal with a less obvious but equally serious threat: overpopulation and a massive military that had 
no enemy to fight. 

In the postwar period there were massive population surges and the overpopulation, coupled with the 
destruction and famine bred by the Rain Forest Wars, threatened to destabilize the economy. 
2291 A team of researchers, physicists, and mathematicians working in secret developed the Shaw-Fujikawa 
Translight Engine, a practical means of propelling spacecraft across vast interstellar distances. This new 
engine allowed ships to tunnel into "the Slipstream" (also called "Slipspace"). Slipspace is a domain with 
alternate physical laws, allowing faster-than-light travel without relativistic side-effects. Faster-than-light 
travel is not instantaneous; "short" jumps routinely take up to two months, and "long" jumps can last six 
months or more. 

The SFTE generated a resonance field, which when coupled with the unusual physics of the Slipstream, 
allowed for dramatically shorter transit times between stars; however, scientists noted an odd "flexibility" to 
temporal flow while inside the Slipstream. Though no human scientist is sure why travel time between stars is 
not constant, many theorize that there are "eddies" or "currents" within the Slipstream-there is generally a 
five to ten percent variance in travel times between stars. This temporal inconsistency has given military 
tacticians and strategists fits-hampering many coordinated attacks. 
2310 The Earth government unveils the first in a line of colony ships; given conditions on Earth are 
deteriorating in the face of overpopulation, hitching a ride out to a colony becomes a highly attractive option. 
Additionally, the Earth government plans to attach military personnel to each colony, to help better utilize the 
massive (and expensive) standing fleets. Because FTL travel is still fairly new and expensive, colonists and 
military personnel face a stringent regimen of physical and mental testing. In theory, only the best-qualified 
citizens and soldiers are allowed to colonize "nearby" worlds. This is the birth of the Inner Colonies; typically 
Inner Colonials are—later in the timeline—considered the elite, the best and brightest. 
2362
Jan 1 The Odyssey is launched. The lead ship in the colony vessels, the Odyssey—laden with troops and 
terra forming gear—spearheads the colonization of a new world. This sparked the first wave of human 
expansion beyond the confines of the Solar System. 
2390 The colonization of the Inner Colonies was fully underway. There were 210 human-occupied worlds in 
various stages of terraforming, and the population burden across human-controlled space was largely 
stabilized. 
2468 The outer colony of Harvest is founded, and the Tiara space station is constructed. 
2473 The Phoenix-class colony ship UNSC Spirit of Fire is constructed. 
2490 Expansion continued at a rapid pace, and by 2490 human space encompassed more than 800 worlds 
throughout the Orion Arm of the Milky Way (ranging from fairly well-tamed planetary strongholds to tiny 
hinterland settlements). Outward expansion continued, and the Inner Colonies become a political and 
economic stronghold, though they relied heavily on raw materials supplied by the Outer Colonies. 

During this period, the planet Reach (orbiting Epsilon Eridani, right on Earth's metaphorical doorstep) became 
the UNSC's primary Naval yard and training academy. Reach was a major producer of warships and colony 
vessels, as well as a training ground for covert operatives and Special Forces. 
2491 The ORION Project, the predecessor of the SPARTAN-II Program is initiated by the Office of Naval 
Intelligence. 
2492 The UNSC issues a Code: BANDERSNATCH, permitting the usage of nuclear weapons to destroy a 
massive rebellion that could not be held under control on the colony of Far Isle. 
2494 First rebel insurrection in Eridanus system. 
2495 The UNSC Hopeful becomes the largest mobile military hospital in history, complete with fusion reactors 
and a Shaw-Fujikawa Slipspace Drive. Battered in several engagements from rebel skirmishes to Covenant 
assaults, the UNSC Hopeful remains under the command of Admiral Ysionris Jeromi. 
2496 The Eridanus insurrection is defeated by UNSC forces. 
2502
Mar 13 Operation: KALEIDOSCOPE, a plan conceived by ORION Project officials commences. Jerald Mulkey 
Ander, one of the leaders believed to be in charge of the Secessionist Union (People's Occupation 
Government) is assassinated on Harvest by Avery J. Johnson, a young Corporal in the UNSC Marine Corps. 
2510 The structural system for the Pillar of Autumn is designed by Dr. Robert McLees at the Reyes-McLees 
Shipyards over Mars. 
2512 A geological survey team on Sigma Octanus IV finds rocks with odd compositions. These were 
introduced from meteor impacts roughly 60, 000 years ago. 
2513 Second rebel insurrection in Eridanus system, led by Colonel Robert Watts, is suppressed by the UNSC 
in operation TREBUCHET. Watts is driven into the local asteroid belt. 

Brain mutations are outlawed by UNSC MED CORPS. 

The 1st Battalion of the 21st Marine Division - an element of the UNSC's 9th Marine Expeditionary Force - led 
by Colonel Ponder was sent on Eridanus II in an attempt to capture Insurrectionist leaders and put down the 
Eridanus Rebellion as part of Operation: TREBUCHET. The mission, however, ended in one of the 
insurrectionist leaders' family getting killed in Elysium City, and Colonel Ponder being injured in action and 
demoted to Captain. 
2517
Aug 17 Dr. Halsey and Lieutenant Keyes meet 6-year-old John on a playground in Elysium City, Eridanus-2. 
2517
Sep 23 Project SPARTAN II begins on Reach with 75 conscripts. Project SPARTAN is an attempt to develop 
an effective, surgical military team to relieve political tensions and circumvent civil war. 
2519
Jul 12 John makes squad leader. 
2520 The Phoenix-class colony ship UNSC Spirit of Fire is refit as a military warship. 
2523
Jul 14 SPARTAN Training exercise: Capture the Flag against Tango Company. 
2524
Jun 16 As part of Operation: TREBUCHET, two four-man teams led by Staff Sergeants Nolan Byrne, and 
Avery J. Johnson (backed by the UNSC corvette Bum Rush hovering in high-orbit, and transported via two 
AV-14 Hornet fast attack aircrafts) infiltrate the city of Casbah on the outer colony of Tribute as ordered by 
Colonel Aboim. Their objective is to eliminate Insurrectionist bomb engineers. Although the UNSC Marine 
squads succeed in neutralizing an explosives-manufacturing facility, some of the Insurrectionists - armed 
mainly with handguns - smuggle the bombs into Casbah, the main population center of Tribute. The situation 
worsens, leading to a hostage crisis at one of the Jim Dandy restaurants where 38 civilians, 2 rebels and 3 of 
Sergeant Byrne's marines are killed, Byrne and Johnson themselves being wounded. 
2525
Feb Minor Transgression, a Jackal-operated ship arrives in the Epsilon Indi System and discovers the human 
colony world of Harvest. The Luminary (a Covenant device designed to detect Forerunner artifacts) onboard 
the vessel pinpoints several thousands of Forerunner relics, including an Oracle, all registered on the surface 
of Harvest. The Jackals seize the opportunity to claim some of the relics for themselves before informing the 
Covenant High Council, and begin assaulting UNSC freighters (including the UNSC Horn of Plenty). The Office 
of Naval Intelligence responds to the mysterious attacks, misinterpreting them for Insurrectionist raids. 
Setting up a well-organized task force, Sergeants Avery Johnson and Nolan Byrne ambush the Jackals 
onboard one of the UNSC's freighters, foiling the aliens' plans to land on Harvest, and delaying a potential 
invasion. Two survivors - the Grunt Deacon Dadab and the Engineer "Lighter Than Some" - flee the skirmish in 
an escape vessel. Following the engagement, the UNSC mobilizes the Colonial Militia (a reserve branch of the 
UNSC Army intended to defend a colony and protect its citizens in case of an enemy invasion) to confront a 
possible assault from this "new enemy". 
2525
Feb 3 Contact with Harvest, an outer colony, is lost shortly after the colony itself had made contact with an 
unknown object. The Colonial Military Administration sends the scout ship Argo to investigate. 
2525
Feb 11 Two members of the Covenant High Council - the Minister of Fortitude and the Vice Minister of 
Tranquility - conceive a plan to overthrow the Covenant Hierarchs in order to lay hold of the enormous 
amount of Forerunner relics. Political discords within the Covenant hierarchy determine the Ministers to utilize 
the Rapid Conversion - a Brute-controlled vessel guided by Chieftain Maccabeus and his crew - to lay siege 
on Harvest and gain control of the relics, without giving the Elites a chance to tip the power balance. Upon 
the ship's arrival in the Epsilon Indi System, the Brutes spot Deacon Dadab and Lighter Than Some's 
emergency escape vessel. Chieftain Maccabeus uses his finding as a profitable way to boost his Grunts' 
morale, and repair the ship's damaged sections - which he intentionally wrecked - with help from Lighter Than 
Some. 

The two AI's controlling the planet Harvest (Sif and Mack) design a peace message in the form of an image in 
an attempt to establish peaceful relations with the aliens. The peace offering fails after a disoriented Grunt 
fires on a colonial militiaman, leading to the Brutes' onslaught upon the human colony. 
2525
February - October After putting their coup to work, the Minister of Fortitude and the Vice Minister of 
Tranquility request the advice of an Oracle onboard the Forerunner Dreadnought. The Oracle reveals that 
Harvest does not hold Forerunner artifacts, but human settlements which the Covenant had mistakenly 
considered as being of Forerunner origin, claiming that the humans are actually "Reclaimers" or "living 
Forerunners". Having learned this, the two Ministers take their plan one step further, and uphold secrecy 
regarding the presence of living Forerunners on Harvest, as to avoid a major crisis which could ultimately lead 
to the downfall of the Covenant. 
2525
Feb 23 As the Brutes begin to devastate Harvest, Colonial Militia forces evacuate civilians out of the major 
cities and ferry them to the capital city of Utgard. In an effort to save as many Harvesters as possible, the 
Colonial Militia transports the civilians to the orbital space station Tiara, which supports the seven space 
elevators of Harvest, and aboard the UNSC freighters. After several attempts to defeat Sergeant Avery 
Johnson's task force on the Tiara, the ten-Brute team led by Tartarus (a young Brute pack leader) is 
betrayed by Dadab and Lighter Than Some, hindering his chance to stop the Harvesters onboard the 
freighters to flee to safety. 

Harvest is glassed, and the remaining survivors onboard the freighters are transported away from the 
devastation. Following the coup, the Minister of Fortitude and the Vice Minister of Tranquility become the 
High Prophets of Truth and Regret. Using the Luminary's guidance to discover human colonies, the Covenant 
declares war on humans in order to safeguard its place in the Forerunners' history. 
2525
Apr 20 The Argo arrives in-system and makes one confirmation transmission. No further reports are received. 
2525
Mar 9 The SPARTANs undergo a radical series of biological, neurological, and physiological alterations. 30 die, 
12 are permanently disabled, and 33 successfully adapt. 
2525
Sep 12 The SPARTANs first "official" mission, to infiltrate the rebel base on Eridanus to capture the rebel 
leader, Colonel Robert Watts, is successful. 
2525
Oct 7 A UNSC battle group, consisting of the destroyer Heracles, under Captain Veredi, and the two frigates 
Arabia and Vostok, enters the Harvest system and discovers that everything on the planet has been 
completely incinerated and the surface melted down to glass. In orbit around the remains of the colony world 
is a single alien ship, which proceeded to attack the battle group, destroying both Arabia and Vostok and 
badly damaging the Heracles. Intercepted communications identify the enemy as The Covenant. The 
message "Your destruction is the will of the Gods. And we are their instrument" is broadcast in UNSC 
language. 
2525
Nov 1 Vice Admiral Preston Cole mobilizes the largest fleet in human history to retake Harvest. 
2525
Nov 2 The SPARTANs learn of the attack of the Covenant at Harvest and Project MJOLNIR commences. CPO 
Mendez leaves to train next group of SPARTANs. 
2525
Nov 27 Project MJOLNIR, a comprehensive package of scientifically enhanced armor, custom-tailored to the 
biologically augmented SPARTANs, is introduced to John and his squad at the UNSC Damascus Materials 
Testing Facility, on the planet Chi Ceti-4. The SPARTANs (now decked out in Mjolnir armor) destroy a 
Covenant ship by carrying a nuke onboard, inside the energy shield. 
2530 The outer colony of Eridanus II is destroyed by the Covenant. 
2531 Cole's war fleet engages the alien warship responsible for the decimation of the colony, scoring a 
victory (though the battle cost Cole two-thirds of his battle group). Only a last minute tactical inspiration 
turned the tide of battle. 

After returning to Earth, Cole—promoted to Admiral—learns that a number of outlying colonies have been 
destroyed, leaving behind no survivors. Cole begins to move his fleet around, trying to intercept the 
invaders. Ground and ship-to-ship battles begin in earnest, raging throughout the Outer Colonies. During one 
ground engagement, Human forces capture one of the aliens. Before succumbing to his wounds, 
interrogators learn that the aliens refer to themselves as "the Covenant" (roughly translated). 
2531
May 1 Spartan-II Blue Team is deployed on planet Victoria, located in the 111 Tauri System. Their mission is 
to infiltrate a United Rebel Front outpost and retrieve several stolen UNSC nuclear warheads. The operation 
is a success, leading to the death of General Howard Graves - one of the people speculated to be in charge 
of the United Rebel Front. 
2531
Nov 7 SPARTAN-051, Kurt, is covertly reassigned to ONI Section Three and tasked with secretly training a 
new generation of soldiers, the SPARTAN IIIs, assisted by CPO Mendez and under the authority of Colonel 
Ackerson. He is promoted to Lieutenant and is given the last name Ambrose. 
2535 In the course of four short years, Cole's forces are hammered, despite his excellent leadership and 
tactical brilliance. It is simply a matter of being outgunned; Covenant kill ratios tend to top four to one in ship-
to-ship combat. By 2535, virtually all of the Outer Colony worlds have been destroyed by the Covenant. The 
"Cole Protocol" is established by military order: all human vessels must ensure that Covenant forces do not 
find Earth. Human ships must-when forced to withdraw-not move on to an Earth bound vector, even if that 
means jumping without proper navigational calculations. If blind jumps are not possible, the ship's captain 
must order self-destruction if capture is imminent. In addition, it is also imperative that the powerful ship A. I 
. Data cores not fall into Covenant hands, so part of this protocol involves either the removal or destruction 
of the ship's A. I . In extreme situations. 
2535
Feb 12 Jericho VII in the Lambda Serpentis system falls. Master Chief, on board the UNSC Destroyer 
Resolute under Captain de Blanc, is allowed to view as the Covenant fleet glasses the planet. 
2536 Covenant forces begin to swarm into the Inner Colonies. For several years the war falls into a pattern: 
humans win isolated battles, typically during ground operations, but at a horrible cost. In space combat, the 
humans are losing at a precipitous rate, and one by one, the colonies fall. 
2537
July 27 SPARTAN III Alpha Company begins Operation PROMETHEUS, to disable as much of the Covenant 
orbital shipyard K7-49 as possible. In a little over a week, the shipyard is completely shut down, at the loss of 
the entire company of SPARTANs. 
2537 An armed insurrection takes place on the colony world of Mamore. 
2539 SPARTAN III Beta Company Team X-ray vanishes while on a routine exercise north of Camp Currahee 
on the planet Onyx in the Zeta Doradus system. ONI fences off the area, designates it "Zone 67, " and 
declares it absolutely off-limits. 
2545
July 3 SPARTAN III Beta Company is delivered to Pegasi Delta onboard the All Under Heaven, beginning 
Operation TORPEDO, the destruction of a Covenant refinery. The operation is a success, although all but 
two of Beta Company, Tom (B292) and Lucy (B091), are lost. 
2547 Section Two of the Office of Naval Intelligence publicly announces the existence of the SPARTAN-II 
Program in an effort to boost morale throughout the UNSC. 
2549 Sergeant Avery Johnson encounters the Boren's Syndrome due to intense exposure to radiation. 
2550 The Pillar of Autumn is refit to serve near Zeta Doradus. 
2551
Feb 19 Biological augmentation of SPARTAN III Gamma Company, including significant brain chemistry 
modifications designed to enhance primitive survival responses in times of extreme stress, authorized by 
Lieutenant Ambrose. 
2552
Jul 17 A Covenant fleet is discovered by Ensign William Lovell on UNSC Remote Scanning Outpost 
Archimedes, entering the Sigma Octanus system. Commander Keyes, on board the UNSC Destroyer Iroquois, 
takes on 4 medium-tonnage Covenant craft (two frigates, one destroyer, one carrier), and destroys 3 of 
them in what becomes known as the 'Keyes Loop'. The Carrier heads to Sigma Octanus IV and drops 
Covenant troops, invading the city of Cote D'Azur. Keyes is promoted to Captain by Admiral Stanforth. 
2552
Jul 18 The SPARTANs and the Marines engage Covenant forces on the ground, eventually nuking Cote 
D'Azur and most of the Covenant invasion force (but very few humans), while 4 dozen UNSC ships engage 
20 Covenant craft. Seven human craft survive. The Iroquois destroys a stealth ship receiving an encrypted 
transmission from the surface. Once this ship is destroyed, the 7 surviving Covenant ships break off and 
flee. The Iroquois heads back to Reach for debriefing. A Covenant tracker attaches itself, unseen, to the 
Iroquois' hull. 
2552
Aug 12 The Master Chief is debriefed by ONI at Camp Hathcock, Reach, on the events of Cote D'Azur. 
2552
Aug 25 The Pillar of Autumn is chosen by Dr. Halsey and Cortana (with Keyes as Captain) to handle a secret 
mission that Dr. Halsey is planning. 
2552
Aug 27 John rejoins the remaining SPARTANS (except for three that are otherwise engaged - Gray team) in 
the FLEETCOM Military Complex on Reach, where they learn of their next mission: To acquire a Covenant 
vessel, navigate to the Covenant home world, and return with captured Covenant leadership. 
2552
Aug 29 The Master Chief gets a neural interface upgrade and new armor with built-in Covenant shield 
technology. He is also introduced to Cortana, an A. I . Created from Dr. Halsey's own neural patterns. 
2552
Aug 30 Cortana gets revenge on Colonel Ackerson, part of ONI's Special Warfare branch, for attempting to 
eliminate Cortana and Master Chief - she gets him transferred to the front. Bypassing several other colonies, 
the Covenant arrive at Reach and begin what has become all too familiar to the embattled Human forces: the 
destruction of the planet. 
2552
Aug 30 The remaining SPARTANS are divided into two teams: Red and Blue. John and the rest of Blue team 
(Linda and James), while on an orbital mission to ensure that a NAV database stays out of Covenant hands, 
end up onboard the Pillar of Autumn when she jumps away from the Reach system to evade Covenant 
forces. James is lost and Linda is mortally wounded, and the subsequent mission on Halo is left to the Master 
Chief to complete. 

The Covenant take the surface of Reach, and Red team splits, one group to retrieve Admiral Whitcomb, 
while the rest hole up in ONI's Castle Base underground facility with Dr. Halsey. The Spartans receive parts 
of a MJOLNIR Mark V upgrade and new weapons, while Dr. Halsey learns of Colonel Ackerson's mysterious 
plans, plans that seem to involve "her" Spartans. 
2552
Sep 4 Lieutenant Wagner returns to Earth and reports on the evident destruction of Reach to Colonel 
Ackerson, Admiral Hood, and General Strauss at an ONI facility in Sydney, Australia. 
2552
Sep 7 The Time/Date Record Anomaly of Sep 23, 2552 most likely rejoins the timeline here. Dr. Halsey and 
members of Red team discover an enigmatic shard in an ancient installation below the ONI facility. Blue team 
joins with team Gamma to retrieve Admiral Whitcomb, and rejoin the rest of Red team who have been 
besieged by the Covenant, who apparently revere the artifact that the humans have found. Dr. Halsey 
destroys ONI's underground facility CASTLE BASE on Reach, preventing the Covenant from gaining control of 
its secrets. 
Unknown The remaining Spartans, Admiral Whitcomb, Dr. Halsey, Sgt. Johnson, Lieutenant Haverson, 
Warrant Officer Polaski, and Corporal Locklear jump to Slipspace on board the Covenant/Human hybrid ship 
Gettysburg/Ascendant Justice, and discover that the shard seems to have the ability to bend both space and 
time. 
2552
Sep 12 The Gettysburg/Ascendant Justice arrives for refit and provisioning in Eridanus system and meets 
with the rebels under Governor Jiles. Dr. Halsey sedates Spartan 087, Kelly, and absconds with her on 
Governor Jiles ship (the Beatrice), a Chiroptera-class vessel, the smallest UNSC classification that contains an 
SFTE. Before she goes, she gives the alien artifact to Corporal Locklear, with implicit instructions to destroy 
it. 
2552
Sep 13 Admiral Whitcomb and Lieutenant Haverson destroy the majority of the surrounding Covenant fleet 
by detonating the Unyielding Hierophant. John, Linda, Will, and Fred, the last known remaining Spartans, 
along with Sgt. Johnson, and, of course, Cortana, depart for Earth to warn of the impending Covenant 
invasion. 
2552
Sep 19 The Pillar Of Autumn arrives at Halo. A company of Orbital Drop Shock Troopers (UNSC Naval Special 
Forces) led by Major Antonio Silva and his second in command, Lieutenant Mellisa McKay land on Halo via 
'Human Entry Vehicles' and establish an operational firebase situated near a mesa a few kilometers away 
from the Pillar of Autmun's crash site. Alpha Base, as it was designated, had been supplied and heavily 
fortified with what remained of the Pillar of Autmun's arsenal. 

Believing that the Master Chief was hiding out at Alpha Base, Covenant ground and aerial forces commanded 
by Zuka 'Zamamee and Noga 'Putumee attack the base in an effort to capture the Chief. The attack fails and 
the base is held by Major Silva. 
2552
Sep 22 The Master Chief and Cortana, onboard a Longsword in the debris field of the destroyed Halo, find 
one remaining Pelican containing Sgt. Johnson, Lieutenant Haverson, Warrant Officer Polaski, Corporal 
Locklear, and a set of cryotubes containing Spartan 058, Linda. 

Planning to fly the Truth and Reconciliation to Earth, Major Silva and the ODSTs abandon Alpha Base. The 
captured Covenant ship, however, had been sabotaged by Lieutenant McKay, leading to Major Silva's, the 
ODSTs and her death. 
2552
Sep 23 The Master Chief, Cortana, Linda, Polaski, Sgt. Johnson, Haverson, and Locklear depart for Reach 
via Slipspace aboard the Covenant Flagship Ascendant Justice, captured near the Halo debris field. A 
Time/Date Record Anomaly continues from this point in the narrative, resolved above on Sep 7, 2552. 
2552
October SPARTAN-062 (Maria) tests the Mjolnir MARK VI armor system against a platoon of ODSTs, guided 
by naval officers at the Songnam Special Warfare Center in Korea. The armor is approved and sent to the 
Cairo Orbital Defense Platform. 

Blue Team responds to Covenant incursions and expeditions on Mount Erebus in the Antarctic and the 
Yucatan Peninsula. Covenant forces in the Antarctic are eliminated by a HAVOK tactical nuclear missile. These 
number of Covenant expeditions consisted in geological examinations and excavations of Earth's soil and 
seabeds. 
2552
Oct 20 The Master Chief and Captain Keyes (post-humously) are decorated for their actions on Reach and 
Halo 04. 

Concurrently, the Elite Commander of the Covenant fleet "Particular Justice" is punished for Heresy before 
being transformed into the Arbiter. 

The Prophet of Regret and his relatively minor fleet arrive at Earth presumably looking for Forerunner 
installations, unaware of its status as the Human homeworld. After a brief conflict and some exploration in 
Africa, Regret retreats to Delta Halo 05 followed by Miranda and the In Amber Clad. 

Four other UNSC vessels, the corvette Coral Sea, the two frigates Redoubtable and Paris, and the prowler 
Dusk are both close enough to the Slipspace rift and have charged Slipspace capacitors, and attempt to 
follow the In Amber Clad into the eleven nondimensions of Slipspace. 

New Mombasa is destroyed in the Slipspace wake of Regret's ship. 
2552
Oct 31 While engaged in a drill near Camp Currahee on the planet Onyx, members of SPARTAN III Gamma 
Company observe apparently newly-activated Sentinels operating within Zone 67. 
2552
Fall UNSC ground forces (possibly UNSC Army) led by Colonel James Ackerson are pinned down against the 
Covenant Loyalist Army in the Mare Erythraeum basin on Mars. The battle results in a UNSC defeat, and 
Colonel Ackerson is captured and interrogated by the Brute Commander Lepidus onboard the Covenant 
cruiser Triumphant Declaration. While being tortured, Ackerson reveals that a certain "Key of Osanalan" 
located in the city of Cleveland, United Republic of North America on Earth, is required to properly fire the 
Halo arrays. This later sparks the Covenant Loyalist assault on Cleveland, where combined forces of UNSC 
Marines and ODSTs attempt to resist the onslaught. 
2552
Nov 3 Dr. Halsey and Kelly arrive in the Zeta Doradus system, and are immediately attacked by Sentinels as 
they approach Onyx. They crash-land the Beatrice, and join forces with Kurt, Mendez, and the Team Saber 
squad of SPARTAN IIIs. Dr. Halsey coerces the Onyx AI, Endless Summer, to assist them by sending a 
message through Slipspace warning FLEETCOM about the events currently unfolding at Onyx. As the 
Slipspace COM probe is launched, the AI detects another message being transmitted from within the 
Slipspace matrix. It is Cortana, warning FLEETCOM that the Flood, with the help of a previously unknown 
coordinating intelligence, was attempting to escape Delta Halo. 

Blue Team, consisting of Fred, Will, and Linda, is ordered to Onyx to aid Dr. Halsey and the others. They 
hijack the Covenant cruiser Bloodied Spirit and transition to Slipspace for the journey, only to have the ship 
automatically drop back into normal space to answer a different distress call. This is from the Covenant ship 
Incorruptible, commanded by the Elite Voro 'Mantakree, which is being attacked by a Brute-commanded pair 
of frigates, the Twilight Compunction and the Revenant. The SPARTANS manage to re-enter Slipspace and 
continue on to Onyx, but not before the Covenant discover who they are and where they are headed. 

Dr. Halsey discovers that Onyx is what the Forerunner referred to as a "Shield World", and contains a stable 
Slipspace rift deep within the planet's structure. As the Covenant close in on the humans within Onyx, Dr. 
Halsey persuades them all to enter the rift, to escape whatever galactic destruction the Forerunner intended 
with the Halos that she is convinced is inevitable. Dr. Halsey, Mendez, SPARTAN III Gamma Company Teams 
Saber and Katana, Tom, Lucy, Fred, Linda, and Kelly all pass through the rift as it closes, as Kurt detonates 
two warheads within the ammassed Covenant forces. The detonation obliterates much of the planet's 
organic material, revealing an underlying structure composed entirely of trillions of Sentinels, all focused on 
protecting the rift. 
2552
Nov - Dec Armament of UNSC Navy and Marine units takes place on Mars, one of the remaining colonies still 
controlled by the Earth government. 
2552
Dec 9 Covenant Loyalists and a combined force of UNSC Special Forces and Marines clash in eastern 
Afghanistan on Earth. Although suffering heavy casualties, the 2nd Battalion of Orbital Drop Shock Troopers 
is able to locate the Master Chief's position as he enters the atmosphere. 
2552 - 2553
Nov - Mar After crashing in East Africa, the Master Chief is recovered by a squad of UNSC Marines led by 
Sergeant Avery Johnson and the Arbiter. The group splits, and attempts to reach the extraction zone. 
Johnson and his men manage to board a Pelican, but find themselves captured by Brutes shortly afterwards. 
The Master Chief and the Arbiter find Johnson and his men and rescue them. 

The Master Chief, Johnson, and the Arbiter arrive at a five hundred year-old underground UNSC military 
base near the town of Voi named the "Crow's Nest". Commander Miranda Keyes and Lord Hood plan an 
attack on the High Prophet of Truth in order to avoid the activation of the Portal, but are interrupted by a 
detachment of Covenant Loyalists which take over the base. 

As Lord Hood orders his remaining ships to attack Truth's fleet, a slipspace entrance is created by the Portal. 
A Flood-infested vessel carrying a construct identified as Cortana crashes near Voi, and the city is quickly 
overwhelmed by the parasite. This is in fact a part of Cortana, containing a recorded message. 

The construct is retrieved from the ship, and repaired by 343 Guilty Spark. Onboard the Sangheili vessel 
Shadow of Intent - commanded by Rtas 'Vadumee - the recorded message held within the construct informs 
Lord Hood and the Master Chief that the Portal holds the secret to the defeat of the Flood. 

Passing through the slipspace Portal, Commander Keyes and her fleet arrive at the Ark. After a brief 
engagement between the UNSC fleet and the Covenant Loyalist fleet, the Master Chief and the Arbiter learn 
that the Ark is situated beyond the galactic rim, thus safe from the Halos range of fire. Apart from its 
advantageous location to escape the Flood, it also serves as a construction facility to built replacement Halos 
in case one is severely damaged or destroyed. 

Making her way into the Control Room of the Ark where Johnson is held captive, Commander Keyes is killed 
by the Prophet of Truth. He uses Johnson to activate the seven Halo rings. 

Joining forces with the Flood, the Master Chief and the Arbiter eliminate Truth's defenses, Truth himself 
being killed. An unexpected turn of events follows, and Gravemind betrays the Master Chief and the Arbiter 
as Johnson flees onboard a Pelican. 

Cortana conceives a plan to destroy the Flood without affecting the Milky Way. Safely distanced from the 
galaxy, the replacement Installation 04 can eliminate the Flood for good once fired. The Master Chief 
infiltrates the Flood-infested High Charity, retrieves Cortana and uses the Index from the former Installation 
04 to fire the Halo and destroy the Flood and its leader. While attempting to activate the replacement 
Installation 04, Johnson is killed by 343 Guilty Spark, claiming that a "premature firing" will destroy both the 
Installation and the Ark. 

Guilty Spark is destroyed by the Master Chief, who then activates the Halo and heads towards the UNSC 
Forward Unto Dawn. The Arbiter and the Master Chief make it onboard the ship, however, the slipspace 
Portal is deactivated as the Halo stirs. Half of the Frigate containing the Arbiter passes through the Portal, 
and the other half containing the Master Chief and Cortana stays behind. 
2553
Mar 3 The Human-Covenant War ends. A memorial dedicated to the victims of the war is built in Kenya on 
Earth.

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