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Halopedia Timeline

==Primordial Era==

*Over '''500,000,000 BCE''', the [[Precursor]]s are stated by the [[Gravemind]] to have created the [[Domain]],<ref>'''Halo: Silentium''', ''pages 208-209''</ref> coalescing the sum of their knowledge—encompassing a hundred billion years—into a unified reservoir integrated into their many [[neural physics]] artifacts in the [[Milky Way]] galaxy. However, the Domain may have been first created long before this, as [[Forthencho]], acting as a messenger for the Gravemind, later stated that it had existed for many billions of years.<ref>'''Halo: Silentium''', ''page 322''</ref>

==Forerunner era==

*Circa '''15,000,000 BCE''', the [[Precursor]]s create and seed the species that would come to be known as [[Forerunner]]s on the planet [[Ghibalb]].<ref>[https://www.halowaypoint.com/en-us/universe/species/forerunners '''Halo Waypoint''': ''Forerunners'']</ref>

*Circa '''10,000,000 BCE''', the [[Precursor]]s choose early [[human]]s to be the next species to carry the [[Mantle]]. Desiring to seize the Mantle for themselves, the early [[Forerunner]]s [[Forerunner-Precursor war|rebel against the Precursors]] and wipe them out almost entirely.<ref name="s181">'''Halo: Silentium''', ''page 181-182''</ref> After the Forerunners hunt down all of the Precursors in the [[Milky Way]] galaxy, the remains of the race retreat into the [[Large Magellanic Cloud]]; the Forerunners' [[Warrior-Servant|Warrior]] fleets pursue them via [[probability mirror]]-reconciled [[slipspace portal]]s and proceed to finish their work. A number of Forerunners who conscientiously object to the complete destruction of the Precursors are exiled on a barren planet within the [[Tarantula Nebula]]; these Forerunners later remain as the [[Path Kethona Forerunner|only surviving population]] of the expedition to the Large Magellanic Cloud.<ref>'''Halo: Silentium''', ''page 179''</ref>

*In the face of extinction, most of the Precursors reduce themselves to inert powder, intending to regenerate their forms later. However, this dust would deteriorate over the coming eons, eventually bringing forth the parasitic [[Flood]].<ref>'''Halo: Silentium''', ''page 174''</ref> However, [[Primordial|one intact specimen]] remains in deep stasis and is buried within a remote [[asteroid]] a million years afterward.<ref name="s181"/>

*Circa '''9,000,000 BCE''', the [[Primordial]], a dormant [[Precursor]],<ref>'''Halo: Silentium''', ''page 181-182''</ref> is said to have arrived on the edges of [[Milky Way|the galaxy]]. This being is later discovered by [[Prehistoric human civilization|early spacefaring humans]] during the last decades of the [[Human-Forerunner War]] and brought to [[Charum Hakkor]] in a [[stasis capsule]].<ref>'''Halo: Silentium''', ''page 173''</ref>

*Prior to '''1,100,000 BCE''', [[ancient human]]ity achieved its earliest known spacefaring technological state and settled on numerous worlds along the galactic margin.<ref name="sil">'''[[Halo: Silentium]]''', ''pages 67-68''</ref> They would later experience several dark ages resulting in the loss of most of their historical records and knowledge before eventually encountering the Forerunners.<ref>'''[[Halo: Primordium]]''', ''page 237-238''</ref>
*Around 1,100,000 BCE, the [[Forerunner]] [[Rate#Theoretical|Theoretical]] known as [[Boundless]] begins to study a particular star within the [[Path Kethona]] galaxy. When she continues her work in defiance of [[Warrior-Servant|Warrior]] orders to the contrary, she is eventually prosecuted, her studies are suppressed, and she is forced to enter a [[Cryptum]].<ref name="sil"/>
*A thousand years later, Boundless' Cryptum is opened and it is discovered that she has died inside due to a malfunction in the Cryptum, supposedly resulting from sabotage. Her former students discreetly dispose of her body.<ref name="sil"/>

*After Boundless' death, the entire Theoretical [[rate]] is absorbed into the [[Builder]]s.<ref name="sil"/>

*Circa '''150,000 BCE''', the [[Forerunner]]s are claimed by some records to have risen as the preeminent species in the [[Milky Way Galaxy]] by advancing technological discoveries gathered from the remnants left by prior ancient races. Believing themselves responsible for the lives of all those less advanced then they, the Forerunners initiate the [[Mantle]].<ref>'''[[Halo Encyclopedia]]''', ''page 26''</ref><ref group="note">This entry, originating from the ''[[Halo Encyclopedia]]'', is of dubious accuracy in light of information from ''[[The Forerunner Saga]]'', in which the Forerunners are stated to have been spacefaring for millions of years (albeit having experienced a number of technological dark ages and large-scale record loss events over the course of this period) and that they held the Mantle since [[10,000,000 BCE]], having forcibly seized it from the [[Precursor]]s. However, the ''Encyclopedia'' notes that ''"all Forerunner era dates are approximate, based on available translation and scattered historical data"'', which provides a canonical explanation for the possible inaccuracies of this entry.</ref>
*[[Human]]ity is believed by the Forerunners to have "moved their [[Prehistoric human civilization|interstellar civilization]] outward along the galactic arm" around this time, possibly to escape Forerunner control.<ref>'''[[Halo: Cryptum]]''', "chapter 1", (''"She responded that to the best of Forerunner research, humans had indeed first arisen on Erde-Tyrene, but over fifty thousand years ago had moved their interstellar civilization outward along the galactic arm, perhaps to flee early Forerunner control. Records from those ages were sparse."'')</ref>

*The [[capital]], the center of the [[Forerunner]] [[ecumene]], is constructed around this time.<ref>'''[[Halo: Cryptum]]''', ''page 296''</ref>

*[[Faber-of-Will-and-Might]], a future [[Master Builder]], is born this year.<ref name="HWFaber">[https://www.halowaypoint.com/en-us/universe/characters/master-builder '''Halo Waypoint''': ''Faber'']</ref>

*[[Ur-Didact|Shadow-of-Sundered-Star]], later known as the Ur-Didact, is born this year.<ref name="waypoint didact">[https://www.halowaypoint.com/en-us/universe/characters/didact '''Halo Waypoint''': ''Didact'']</ref>

*Circa '''107,445 BCE''', [[Prehistoric human civilization|human]] colonists proceed to uncover crashed vessels containing [[Flood spores|fine organic powder]] on both inhabited and deserted worlds near the edges of the [[Milky Way|Milky Way Galaxy]]. This powder is administered to the domesticated [[Pheru]], which begin to exhibit more docile behavior; unbeknownst to humanity and their [[San'Shyuum]] allies, the powder begins to alter the Pheru's genetic makeup. Centuries later, the Pheru begin to show outward signs of mutation and cannibalize one another. Soon, both humans and San'Shyuum who are exposed to the powder begin to exhibit the same symptoms.<ref>'''Halo: Cryptum''', ''page 267-269''</ref>

*The [[Flood]] then begins to take over hundreds of worlds, turning its victims into misshapen forms. Humanity begins all-out war against the Flood. During their war against the Flood, humanity desperately invades a minor sector of Forerunner space, sparking the [[human-Forerunner wars]].<ref>'''Halo: Cryptum''', ''page 272''</ref>

*Circa '''106,538 BCE''',<ref group="note">''Halo: Primordium'' specifies that the Primordial was discovered 40 years before "the last of the human-Forerunner wars". This is assumed to refer to the final [[Charum Hakkor campaign|53-year conflict]] fought mainly in the [[Charum Hakkor system]], as this is the longest mentioned continuous conflict which can be reasonably said to fall within the "few extra decades" Yprikushma bought humanity with her subsequent work.</ref> [[Prehistoric human civilization|human]] colonists arriving at a ravaged planet on the edge of the [[Milky Way|Milky Way Galaxy]] discover an exceedingly ancient [[stasis capsule]]. This capsule is the prison of the ancient being known as the [[Primordial]], supposedly the last intact [[Precursor]]. [[Yprin Yprikushma]] transports the capsule and its prisoner to [[Charum Hakkor]] for further study.<ref name="prim236">'''Halo: Primordium''', ''pages 236-238''</ref>

*Yprikushma's science teams revive the Primordial and place it in a [[timelock]] held in a [[Charum Hakkor arena|vast arena]] on Charum Hakkor, soon after devising a way to communicate with the creature. The answers given by the Primordial to the humans' questions about the [[Flood]] are so traumatizing they are believed by [[Forthencho]] to have demoralized humanity to the point of contributing to their defeat against the Forerunners later on.<ref name="prim236"/>

*Yprin Yprikushma begins to push humanity to conduct more intensive research into [[Forerunner]] technologies recovered during earlier human-Forerunner conflicts. Through the technological advances gained, she buys humanity several more decades in its [[Human-Forerunner War|war with the Forerunners]].<ref name="prim236"/>

*Some time afterward, the [[Flood]] begins to recede from the galaxy; while this is thought to be due to a cure created by humanity, no cure ever actually existed; the Flood's withdrawal is instead due to the [[Gravemind]]'s long-term strategy.<ref>'''Halo: Primordium''', ''page 364''</ref> With the Flood seemingly dying out, all traces of the parasite's existence are eventually removed from the Milky Way by humans, their [[San'Shyuum]] allies, and Forerunner Warrior-Servants.<ref>'''Halo: Silentium''', ''pages 34-37''</ref> Throughout the war, most Forerunners remain unaware of the Flood's existence, believing stories of the parasite to be an excuse for humanity's aggressive expansion. The Flood will not seen again for nine millennia.<ref>'''Halo: Cryptum''', ''pages 270-272''</ref>

*Circa '''106,498 BCE''',<ref>'''Halo: Primordium''', ''page 234''</ref> [[Charum Hakkor campaign|the final conflict]] in the [[Human-Forerunner War|human-Forerunner wars]] begins. The [[Forerunner]] [[Warrior-Servant]]s, led by the [[Ur-Didact|Didact]], push [[prehistoric human civilization|humanity]] back to the [[Charum Hakkor system]], the core of their interstellar empire, which is then effectively cut off from available reinforcements of both humans and their [[San'Shyuum]] allies. For the next fifty years, humanity holds off attacks by the [[Forerunner fleet]]s,<ref name="cryptum">'''Halo: Cryptum''', ''page 118''</ref> until their defenses eventually fail after three final years of repelling assaults on the system in a constant stream.<ref>'''Halo: Primordium''', ''pages 239-240''</ref>

*Circa '''106,445 BCE''', the final battles of the [[human-Forerunner wars]] are fought, concluding in the humans' [[Charum Hakkor campaign|standoff]] at [[Charum Hakkor]].<ref>'''Halo: Cryptum''', ''page 131''</ref> Stretched thin due to fighting two wars simultaneously, humanity loses the war and the Forerunners eliminate all traces of humanity's former [[Prehistoric human civilization|interstellar civilization]]. The [[Librarian]] moves the surviving humans to their homeworld, [[Earth|Erde-Tyrene]], and establishes a research station there. With their civilization and technology dismantled, humanity regresses to tribal hunter-gatherers for nearly nine thousand years, eventually developing [[Erde-Tyrene civilization|primitive civilization]].<ref>'''Halo: Cryptum''', ''page 55''</ref>

*Circa '''98,445 BCE''' (approximately a thousand years prior to the firing of the [[Halo Array]]), the [[Forerunner]] [[Promethean]]s, opposed to the construction of the Halo rings, lose their political battle against an extreme faction of the [[Builder]]s led by the [[Master Builder]], [[Faber]], and are forced out of the [[Ecumene Council|Council]]. Many are disgraced or executed while others choose the alternative of exile in a [[Cryptum]]. For the next thousand years, the Council continues to marginalize and diminish the role of the entire [[Warrior-Servant]] rate.<ref name="c238">'''[[Halo: Cryptum]]''', ''pages 238-239''</ref>

*The [[Ur-Didact|Didact]] enters his first, thousand-year exile in a Cryptum on [[Nomdagro]].<ref>'''[[Halo: Silentium]]''', ''String 4''</ref> The Cryptum is later secretly moved to [[Earth|Erde-Tyrene]] by the [[Librarian]].<ref>'''Halo: Cryptum''', ''page 81''</ref>

*The ''[[Deep Reverence]]'' is retired near [[Janjur Qom]], under the care of the [[Confirmer]].<ref>'''Halo: Cryptum''', ''page 180''</ref> 

*With the final obstacle to his plan removed, Faber commissions the construction of the original twelve [[Halo Array|Halo rings]] from the [[guild]] of [[Bornstellar's father]].<ref name="c238"/> 

*[[Growth-Through-Trial-of-Change]] decides to become a [[Lifeworker]] instead of a Builder. She is rejected by her family as a result, and is adopted by a foster family.<ref>'''[[Halo: Rebirth]]'''</ref>

*Circa '''98,395 BCE''',<ref>'''Halo: Silentium''', ''page 163''</ref> the [[Librarian]] undertakes on a mission to study the origins of the [[Flood]] in the [[Magellanic Clouds|satellite galaxy]] of [[Path Kethona]]. In Path Kethona, the Librarian and the crew of her explorer vessel, ''[[Audacity]]'', discover a world with a population of [[Path Kethona Forerunner|primitive Forerunners]]. On this planet, she learns the truth about the [[Precursor]]s' disappearance ten million years earlier: the Forerunners [[Forerunner-Precursor war|rose up against]] their creators and annihilated them in defiance of the Precursors' choice to pass the [[Mantle]] on to [[human]]ity.<ref>'''Halo: Silentium''', ''page 181-182''</ref> The Librarian would keep this information to herself at the time, fearing that the [[Builder]]s in control of the [[Ecumene Council|Old Council]] could potentially use it against her or the [[Ur-Didact|Didact]].<ref>'''Halo: Silentium''', ''page 29''</ref>

*Circa '''97,745 BCE''', first contact is made between the [[Forerunner]] [[Primary Pioneer Group]] and the [[Flood]] on [[G617 g1]]. A military team is sent in later but is subsequently lost. The Flood escapes the planet, thus beginning the three-century-long [[Forerunner-Flood war]].<ref>'''[[Halo 3]]''', ''[[Terminal/Halo 3#Terminal Two|Terminal Two]]''</ref>

*The [[Z-110 Directed Energy Pistol/Exotic|Boltshot]] comes into use with the [[Forerunner]] military near the beginning of the century.<ref>[http://blogs.halo.xbox.com/Headlines/post/2012/09/26/The-Halo-Bulletin-92612-.aspx '''Waypoint''': ''The Halo Bulletin: 9.26.12'']</ref>
*[[Riser]] is born in the city of [[Marontik]] on [[Erde-Tyrene]] around this time.<ref>'''[[Halo: Cryptum]]''', ''page 35''</ref>

*In approximately '''97,495 BCE''' or slightly earlier,<ref group="note">The Halo Array was fired in [[97,445 BCE]]. Mendicant Bias' test-firing of Installation 07 and the Halo's subsequent disappearance took place 43 years before the installation's return during the events of ''Halo: Cryptum'' (''Halo: Cryptum'' page 244 and ''Halo: Primordium'' page 192). ''Halo: Cryptum'' takes place a minimum of seven years before the firing of the Halo Array, which can be extrapolated from a number of statements in ''Halo: Silentium'':<br><br>
It is implied in the description and beginning of ''Halo: Silentium'' that the novel begins several years after the end of ''Halo: Primordium''. On page 193, while testifying to the [[Master Juridical]], Master Builder Faber states that he and his forces held a salient against the Flood for three years after Mendicant Bias' [[Battle of the Capital|attack on the Capital]]. Since the Master Juridical would know how long Faber had been missing since the fall of the Capital, it would be futile for the latter to claim that he had been running his private operation for ''more'' than the time he had been confirmed to be missing. As such, his statement about holding off for three years can be considered the minimum figure for the duration of his exile. However, it should be noted that Faber may have remained missing for more than that time, as the three years of holding that particular salient may have constituted only a portion of the operations he undertook during his exile.<br><br>
Faber's testimony took place after his return to the ecumene, which coincided with his rescue of the [[Ur-Didact]]. As stated on page 28 of ''Silentium'', the Ur-Didact's return had already occurred some time prior to the evacuation of Erde-Tyrene and the Librarian's deposition by [[Catalog]]. There is a four-year period between the Librarian's and the IsoDidact's parting during the evacuation of Erde-Tyrene and their reunion on Nomdagro (''Silentium'', page 197). Although it is not definitely stated how much time passes between the meeting on Nomdagro and the firing of the Halo Array, the almost continuous recounting of the events past Nomdagro up until the Halos' activation in ''Silentium'' would suggest no more than several days or weeks passed in the interim. However, this does not take into account the possibility of increased time dilation effects due to the Precursor-empowered Flood's corruption of spacetime, which interfered with the Forerunners' slipspace travel in the final years of the war.<br><br>
The year 97,495 BCE for Installation 07's disappearance is calculated on the basis that seven years passed between the events of ''Halo: Cryptum'' and the firing of the Halos, therefore indicating that the events described on this page took place fifty years before the firing of the Array. Due to several ambiguities it is possible that the events took place several (though likely no more than five) years earlier than this, but anything beyond the known minimum figure remains in the realm of speculation. It should be noted that the ''Halo Encyclopedia'' lists Mendicant Bias' conversation with the Gravemind as having begun on 100,043 BCE, or 43 years before the approximate date for the firing of the Halos. However, because the ''Encyclopedia'' itself notes that the timeline is only approximate and due to the manifold revisions to Forerunner-era canon introduced by ''The Forerunner Saga'', the information from the novels can be considered to be of superior canonicity to the more unreliable and rough dating provided in the ''Encyclopedia''.</ref> the [[Forerunner]] [[Ecumene Council]] assigns the [[Contender-class artificial intelligence|Contender-class]] [[ancilla]] [[Mendicant Bias]] to test [[Installation 07]] near [[Charum Hakkor]]. The installation, fired on a system-wide power setting, destroys all neurologically complex life and [[Precursor]] structures in the [[Charum Hakkor system|system]] and accidentally liberates an ancient [[Gravemind]] known as the [[Primordial]], which is transported on the ring on [[Master Builder]] [[Faber]]'s orders. Soon after, Faber tasks Mendicant Bias with interrogating the Primordial and Installation 07 is transported in an unknown location. Over the course of their 43-year conversation, the Primordial manages to turn Mendicant Bias against its makers and causing it to join the Flood's cause to destroy the Forerunners.<ref>'''Halo: Primordium''', ''pages 190-192''</ref>

*At the same time the [[Librarian]] returns to [[Earth]] to index the [[human]] species. Sample members of the species are removed from the planet and held on the [[Installation 00|Ark]].<ref name=HE>'''[[Halo Encyclopedia]]''', ''page 27''</ref>

*In '''97,445 BCE''' the [[Forerunner-Flood war]] came to a close with the activation of the [[Halo Array]].<ref name="canon fodder">[https://www.halowaypoint.com/en-us/community/blog-posts/canon-fodder-array-with-words '''Halo Waypoint''': ''Cannon Fodder - Array With Words'']</ref> It should be noted that all of the events listed here are approximate at best, occurring over the course of several years during the last decade<ref name="caveat">'''Halo: Silentium''', ''page 11-12''</ref> before the firing of the Halo rings in the year 97,445 BCE.<ref name="canon fodder"/><ref group="note">[[343 Guilty Spark]] put the date of the firing of the Array as the year 97,448 BCE, though it should be noted that he measured it on Installation 04's year, not the 365.25 day Earth calendar.</ref> As no definite chronology has been established for that timeframe, the events therein are recorded on this page for the sake of convenience.

*Roughly '''ten years''' before the Flood conflict's conclusion, the father of [[Maker-of-Moons]], a high-ranked [[Builder]], is assassinated by [[Master Builder]] [[Faber]]'s [[Builder Security]] minions.<ref>'''Halo: Silentium''', ''page 90''</ref>

*The [[Librarian]] visits the primary [[San'Shyuum]] quarantine world [[Janjur Qom]] to collect specimens of the San'Shyuum as part of the [[Conservation Measure]], sparking unrest among the San'Shyuum population. After [[Master Builder]] [[Faber]] arrives some time afterward to question the San'Shyuum elders about the [[Flood]], the San' Shyuum [[Battle of Janjur Qom|rebel]] against his forces.<ref>'''Halo: Cryptum''', ''page 212''</ref>

*The [[Ur-Didact|Didact]] is resuscitated from his exile in a [[Cryptum]] by [[IsoDidact|Bornstellar Makes Eternal Lasting]], [[Chakas]] and [[Riser]]. They later make their way to Janjur Qom, where they are captured by Master Builder Faber. The Didact is interrogated and left to die in a Flood-infested system, while an offshoot of his consciousness lives on in Bornstellar's body through an imprint acquired in his [[Forerunner mutation|mutation]].<ref>'''Halo: Primordium''', ''page 336-339''</ref>

*Shortly afterward, the Master Builder orders the [[Contender-class artificial intelligence|Contender-class]] [[ancilla]] [[Mendicant Bias]] to use [[Installation 07]] to put down the San'Shyuum rebellion by sterilizing the entire system.<ref name="p191">'''Halo: Primordium''', ''page 191-192''</ref>

*As a result of the Master Builder's activation of the Halo ring, many [[Lifeworker]]s and [[Warrior-Servant]]s on Installation 07 rebel against his forces, but are mostly defeated.<ref name="p191"/>

*A crisis occurs in the [[Ecumene Council]] due to the Master Builder's unauthorized activation of Installation 07; many councilors resign in protest while younger ones take their place. Faber is arrested and placed on trial in the Forerunner [[Capital]]. Eleven of the Halos are brought to the Capital, awaiting a decision to have them decommissioned. Installation 07 and Mendicant Bias remain missing.<ref>'''Halo: Cryptum''', ''page 245''</ref>

*During Faber's tribunal, Mendicant Bias, convinced to turn against its masters by the [[Primordial]], brings Installation 07 to the Capital system and [[Battle of the Capital|launches an assault]] on the Forerunner government.<ref name="p191"/> While the Council's fleets respond to the attack and several of the Halos are destroyed, Mendicant successfully fires Installation 07 before the Halo is forced to retreat into a system near the galaxy's edges.<ref>'''Halo: Primordium''', ''page 272''</ref>

*Having survived Mendicant Bias' attack on the capital, Bornstellar, [[Glory of a Far Dawn]] and [[Splendid Dust of Ancient Suns]] arrive at the [[greater Ark]], where they are healed by the Lifeworkers. As most Forerunners believe the original Didact to be dead, the Didact's consciousness takes control of Bornstellar in order to assume command of Forerunner military forces after a thousand years of exile and continue his mission against the Flood;<ref>'''Halo: Cryptum''', ''page 341''</ref> subsequently, Bornstellar adopts the title [[IsoDidact]].<ref>'''Halo: Silentium''', ''page 20''</ref>

*Shortly afterward, the IsoDidact and his fleet track down Installation 07. Although the Halo takes heavy damage, it survives and is transported to the greater Ark. Afterwards, the installation is sent to its final location,<ref>'''Halo: Primordium''', ''pages 373-374''</ref> to be later joined by the six rings of the newer Halo Array.
**The Primordial is imprisoned once again, and is interrogated - and eventually executed - by the IsoDidact.<ref>'''Halo: Primordium''', ''page 359-367''</ref>
**Mendicant Bias is captured, deactivated and disassembled to its disparate components which are then distributed across the ecumene.<ref name="mb">'''Halo: Silentium''', ''pages 267-268''</ref>
**The mind of a mortally wounded [[Chakas]] is used as the template for the [[monitor]] later to be known as [[343 Guilty Spark]].<ref>'''Halo: Primordium''', ''page 372''</ref>

*The Ecumene Council is reconstituted as the "New Council" and the Didact's plans of a strategy to use [[shield world]]s to combat the Flood are taken into serious consideration again. The use of the Halos is delayed.<ref>'''Halo: Primordium''', ''page 373-374''</ref>

*For a period of at least '''three years''' following the crisis at the Capital, Master Builder Faber, thought dead by the ecumene at large, carries out his own small-scale campaign to combat the Flood with a crew of Builder Security and disgraced Warrior-Servants in a secluded region of the ecumene. He captures and haphazardly decontaminates small Flood-infested ships and then hands them over to Warrior-Servant crews. Due to inadequate decontamination, many of the ships are overrun by Flood still on board.<ref>'''Halo: Silentium''', ''page 193-195''</ref>

*The [[Juridical]] rate is given unrestricted access to all citizens of the ecumene by the Council, with the mandate to investigate matters surrounding the attack on the Capital, Forerunner and human origins, as well as the fate of the Precursors. To this end, the Juridicals dispatch [[Catalog]] to collect testimony from key Forerunner figures, including the Librarian, Ur-Didact, IsoDidact and Faber.<ref name="caveat"/>

*The [[Ur-Didact]], having been left to die in a Flood-infested system by the Master Builder, encounters active Precursor [[star road]]s near [[Uthera Midgeerrd]]. The Didact is subsequently captured and tortured by the Gravemind.<ref>'''Halo: Silentium''', ''String 12''</ref> Afterwards, the Gravemind releases the Didact, who is rescued and taken to the Capital system by the Master Builder.<ref>'''Halo: Silentium''', ''page 199''</ref>

*The Librarian and the IsoDidact arrive at Earth to oversee its evacuation operation and to give their testimonies to Catalog. However, the Flood's arrival in the sector prompts the IsoDidact to leave to defend the core of the ecumene while the Librarian continues her mission;<ref>'''Halo: Silentium''', ''String 2''</ref> the two will not reunite until four years later.<ref>'''Halo: Silentium''', ''page 197''</ref>

*[[Mendicant Bias]] is reassembled and reactivated by a Gravemind after the Flood overruns the facilities in which the components of the AI were held.<ref name="mb"/>

*[[Catalog]] is captured by the Flood and corrupted with the [[logic plague]],<ref>'''Halo: Silentium''', ''page 210''</ref> subsequently spreading the infection across the [[Juridical|Juridical network]].<ref>'''Halo: Silentium''', ''page 215''</ref> With the network suspended, Juridicals are eventually forced to cease all Forerunner legal proceedings indefinitely.<ref>'''Halo: Silentium''', ''page 190''</ref>

*The Flood begins to reactivate and appropriate formerly dormant Precursor artifacts, allowing them to easily overpower Forerunners in combat. Already weakened and exhausted Forerunner defenses continue to fail at an increasing rate.<ref>'''Halo: Silentium''', ''String 25''</ref>

*'''Over a year''' before the end of the war, following irregular outages for several years, the [[Domain]] goes permanently inaccessible to all Forerunners and ancillas due to the Flood's widespread tapping into its underlying [[neural physics]] architecture.<ref>'''Halo: Silentium''', ''page 241''</ref>

*'''Four years''' after the evacuation of Erde-Tyrene,<ref>'''Halo: Silentium''', ''page 197''</ref> the Librarian, the IsoDidact and the Ur-Didact reunite in their family estate on [[Nomdagro]]. The planet is subsequently overrun by the Flood.<ref>'''Halo: Silentium''', ''page 232''</ref>

*After the Capital system is lost to the Flood, command of the ecumene and the bulk of its remaining population is placed at the [[greater Ark]]. In the face of imminent defeat, the Master Builder is restored to command and a decision is made to use the Halo Array to purge the galaxy of life and thus starve the Flood. The IsoDidact is tasked with carrying out this plan.<ref name="s27">'''Halo: Silentium''', ''Strings 27-33''</ref>

*Mendicant Bias and its fleet of Flood-controlled ships and Precursor constructs [[Battle of the greater Ark|assault the greater Ark]].<ref name="s27"/>

*Anticipating that Omega Halo's human population may be at risk, the Librarian sends [[Chant-to-Green]] to collect more humans from Earth to ensure their numbers will be sufficient to repopulate the species.<ref name="s316">'''Halo: Silentium''', ''pages 316-319''</ref>

*While the Forerunners attempt to evacuate the greater Ark, the Ur-Didact uses a [[Composer]] to harvest the preserved human specimens on the nearby [[Omega Halo]] in order to use their patterns to create AIs for his army of [[Promethean Knight]]s, a desperate and futile effort to combat the Flood via conventional means.<ref>'''Halo: Silentium''', ''pages 262-263''</ref>

*Master Builder Faber fires Omega Halo, sterilizing the local galaxy of [[Path Kethona]] of sentient life and clearing a temporary path past the star roads laying siege on the greater Ark.<ref>'''Halo: Silentium''', ''pages 272-273''</ref>

*The greater Ark and Omega Halo are destroyed by star roads; Faber and most high-ranking Forerunner commanders are killed on Omega Halo, while the IsoDidact is saved by Monitor Chakas.<ref>'''Halo: Silentium''', ''pages 274-275''</ref> Only a fraction of the Lifeworkers' biological specimens survive and are transported to the secret [[Installation 00]] by the few surviving Forerunners.<ref>'''Halo: Silentium''', ''pages 306-310''</ref>

*The Librarian infiltrates [[Requiem]] and imprisons the Didact in a [[Cryptum]].<ref>'''[[Halo 4]]''', ''[[Terminal/Halo 4|Terminal 7]]''</ref><ref>'''Halo: Silentium''', ''String 34''</ref>

*The Librarian journeys to Earth, planning to draw the Flood there in order to give the IsoDidact time to fire the Halo rings. She sends Chant-to-Green to the lesser Ark, along with the remaining humans gathered from the planet, and passes her title of [[Lifeshaper]] on to Chant.<ref name="s316"/>

*At Installation 00, the IsoDidact assigns the [[monitor]]s for each Halo installation and has the rings distributed across the galaxy.<ref name="s312">'''Halo: Silentium''', ''pages 312-315''</ref>
**Monitor Chakas is renamed [[343 Guilty Spark]] and assigned as the caretaker of [[Installation 04]].<ref name="s312"/>

*The Librarian, stranded on Earth, initiates the burial process of the [[Portal at Voi]]. As she spends her last hours in the savanna, the Gravemind sends down imprinted ancient human essences to reveal the [[Domain]]'s true nature as a Precursor creation; as a result, the Domain will be destroyed when the Halos fire, leading to the loss of not only all Forerunner history but also the knowledge the Precursors had collected over the course of billions of years.<ref>'''Halo: Silentium''', ''String 37''</ref>

*As the IsoDidact prepares to activate the rings, Mendicant Bias assembles all Flood-controlled vessels into a fleet of 4.8 million ships, and breaches the [[Maginot Sphere]]. On the other side awaits [[Offensive Bias]] with the remains of the Forerunner fleet. As the two fleets engage each other in an [[Battle of the Maginot Sphere|enormous naval battle]], the Halo Array is fired. The Halo pulse kills all sentient life within three radii of the galactic center, including any Forerunners not located on [[Installation 00|the Ark]] or within [[Shield World]]s. Minutes after the firing of the Array, Mendicant Bias's fleet is decimated by Offensive Bias.<ref>'''[[Halo 3]]''', ''[[Terminal/Halo 3|Terminals]]''</ref>

*The remains of Mendicant Bias are brought to Installation 00. The surviving Forerunners hold a trial to the AI for its betrayal; Mendicant Bias is entombed in the installation afterward.<ref name="rebirth">'''[[Halo: Rebirth]]'''</ref>

*Every sentient species indexed in [[Installation 00|the Ark]] is [[reintroduction|returned]] to their homeworlds as a part of the [[Conservation Measure]], the [[Human|''Homo sapiens'']] species begins migrating out of [[Africa]].

*The few surviving Forerunners go into self-imposed exile.<ref name="rebirth"/>

*'''May:''' A report is sent to [[2401 Penitent Tangent]] regarding [[Flood]] containment failure in a [[Cold Storage (Level)|cold storage facility]], urging assistance due to the dangers of a full Flood outbreak. Penitent Tangent ignores this report and protocol despite multiple and more urgent reminders. He continued to ignore this for another 99,779 years, at which point a [[Battle of Installation 05|full outbreak]] had already occurred, but by then it was too late.<ref>'''[[Halo 3]]''', multiplayer level ''[[Cold Storage (Level)|Cold Storage]]'': Transmissions</ref>

*Circa '''57,448 BCE''', a meteor bearing a small [[Forerunner]] [[Sigma Octanus IV artifact|artifact]] crashes on the planet that will be known as [[Sigma Octanus IV]]. It will be discovered by [[human]]ity approximately 60,000 years later.<ref>'''[[Halo: The Fall of Reach]]''', ''page 233-234'' (2001)</ref>

==Rise of the Covenant era==

*Circa '''40,000 BCE''', an [[unidentified alien vessel]] crash-landed in [[Sector 1215]] of [[Installation 04]]. Sometime prior to the crash, the ship started broadcasting a distress signal repeating every 72.83 seconds.<ref name="terminal5">'''Halo: Combat Evolved Anniversary''', ''[[Terminal/Halo: Combat Evolved Anniversary#Terminal 5|Terminal 5]]''</ref><ref name="time">'''Halo: Combat Evolved Anniversary''', ''[[Terminal/Halo: Combat Evolved Anniversary#Terminal 6|Terminal 6]]'' (''"I have now endured 60,000 years without word from outside the Array."'')</ref> After attempting to translate it, [[343 Guilty Spark]] blocked the signal, as no communication revealing the location of any of the Halos was allowed.<ref name="terminal5"/>

*The year '''2200 BCE''' saw a major turning point in the history of the [[San'Shyuum]] (Prophets). After centuries of unity the San'Shyuum become divided into two groups, the [[Stoics]] who believe that [[Forerunner]] relics were sacred and not to be altered, and the [[Reformists]] who wish to more closely examine the artifacts and use them for their own purposes. This fundamental disagreement sparks the [[San'Shyuum Schism]].<ref>'''[[Halo Encyclopedia]]''', ''page 114''</ref>

*In '''2100 BCE''' the century-long [[San'Shyuum Schism]] comes to an end as one thousand [[Reformists]] enter the [[Forerunner]] [[Forerunner Dreadnought|Dreadnought]] and flee the San'Shyuum homeworld [[Janjur Qom]].<ref>'''[[Halo Encyclopedia]]''', ''page 30''</ref>

*In '''2100 BCE''' the century-long [[San'Shyuum Schism]] comes to an end as one thousand [[Reformists]] enter the [[Forerunner]] [[Forerunner Dreadnought|Dreadnought]] and flee the San'Shyuum homeworld [[Janjur Qom]].<ref>'''[[Halo Encyclopedia]]''', ''page 30''</ref>

*After decades of struggle between the Sangheili and San'Shyuum in the [[Sangheili-San'Shyuum war]], the [[Sangheili]] finally accept that they must adapt and study their [[Forerunner]] relics or face defeat at the hands of the [[San'Shyuum]].<ref>'''[[Halo Encyclopedia]]''', ''page 30''</ref> The Sangheili warrior priests reluctantly begin using their relics to improve their warships, arms and armor.<ref>'''[[Halo: Contact Harvest]]''', ''page 147''</ref>

*Circa '''860 BCE''', the [[Planet of Blue and Red]] becomes a location of strategic importance in the [[San'Shyuum-Sangheili War]]. The San'Shyuum arrive at the planet and descend to its surface in an attempt to claim the world's [[Forerunner]] artifacts from the Sangheili. During the [[Skirmish of the Planet of Blue and Red]], [[High Lord]] [[Mken 'Scre'ah'ben]] witnesses [[Sangheili Field Commander|Field Commander]] [[Ussa 'Xellus]]' talent as a military strategist.<ref>'''[[Halo: Broken Circle]]''', ''Prologue''</ref>

*The [[Sangheili]] and [[San'Shyuum]] end their [[Sangheili-San'Shyuum war|war]], merging to form the [[Covenant]]. The [[Council of Concordance]] ratifies the [[Writ of Union]], clearly defining the roles of the San'Shyuum and the Sangheili.<ref>'''[[Halo Encyclopedia]]''', ''page 30''</ref>

*In the first [[Age of Reconciliation]], the [[Covenant]] face rebellion by Sangheili [[heretic]]s opposed to the [[Writ of Union]]. Led by their leader [[Ussa 'Xellus]], the heretics known as the [[Ussans]] depart from [[Sanghelios]] to [[The Refuge|Shield World 0673]] in order to seek sanctuary from the Covenant.<ref>'''[[Halo: Broken Circle]]''', ''page 43''</ref>

*In the First [[Age of Reconciliation]], the [[Mken 'Scre'ah'ben|Prophet of Inner Conviction]], the [[Qurlom|Minister of Relative Reconciliation]], and the [[Sangheili treaty commission]] reconvene to discuss the disappearance of [[Ussa 'Xellus]] and his followers.<ref>'''[[Halo: Broken Circle]]''', ''page 44''</ref>
*The [[Ministry of Anticipatory Security]] is established by the [[Prophet of Excellent Redolence|High Prophet of Excellent Redolence]] and [[R'Noh Custo]] is appointed as its [[Minister (title)|Minister]].<ref>'''Halo: Broken Circle''', ''page 51''</ref>
*The newly designated Minister of Anticipatory Security tasks the Prophet of Inner Conviction with [[Mission to Janjur Qom|a mission]] to [[Janjur Qom]] to retrieve a group of [[Stoic]] females and a [[Forerunner]] [[Luminary]], threatening to use his new-found influence to place the Prophet on the [[Roll of Celibates]] if he declines.<ref>'''Halo: Broken Circle''', ''pages 61-67''</ref> Despite his best efforts, the High Prophet of Excellent Redolence forces Inner Conviction to reluctantly accept command of the expedition.<ref>'''Halo: Broken Circle''', ''pages 73-75''</ref>
*The [[Ussans]] continue to develop their new colony on Shield World 0673, calling it [[the Refuge]]. [[Monitor]] [[Enduring Bias]] informs Ussa and [[Sooln 'Xellus]] of the [[shield world]]'s "Disassembler" process that allows the world to break itself apart and have its disparate parts remain habitable. Intrigued, Ussa investigates the process further.<ref>'''Halo: Broken Circle''', ''page 72''</ref>
*The Prophet of Inner Conviction is given command of stealth [[Covenant corvette|corvette]] ''[[Vengeful Vitality]]'', and a crew consisting of [[San'Shyuum]] Captain [[Vervum L'kosur]], communications officer [[S'Prog]], and weapons officer [[Mleer]], [[Sangheili]] [[Trok 'Tanghil]], [[Vil 'Kthamee]], [[Ziln 'Klel]], and [[Loquen 'Nvong]], and the [[Huragok]] [[Floats Near Ceiling]]. The corvette then departed for Janjur Qom.<ref>'''Halo: Broken Circle''', ''page 79''</ref>
*Growing distrustful of Ussa, [[Salus 'Crolon]] and [['Drem]] begin to conspire against the Refuge's leadership. [[Tersa 'Gunok]] refuses to join them, but becomes inadvertently involved with the conspiracy nonetheless.<ref>'''Halo: Broken Circle''', ''pages 89-94''</ref>
*''Vengeful Vitality'' arrives at the [[Reskolah]] region of Janjur Qom and a team is sent to the planet's surface, led by the Prophet of Inner Conviction. Upon arriving at the [[grotto of the Great Transition]], the group retrieves a Luminary and [[Purifying Vision of the Holy Path|a device]].<ref>'''Halo: Broken Circle''', ''pages 97-103''</ref> Loquen and Vervum betray the rest of the team, upon the orders of the Minister of Anticipatory Security. However, due to the intervention of Vil and Floats Near Ceiling, the others escape while Vervum and Loquen are killed or captured by the Stoics.<ref>'''Halo: Broken Circle''', ''pages 108-114''</ref>
*Tersa becomes infatuated with [[Lnur 'Mol]], and the two walk together in [[Ussa's Garden]]. They overhear 'Crolon and 'Drem attempt to convince [[Gmezza|two]] [[Scorinn|others]] to join their secret rebellion, but Tersa and Lnur are spotted. The two manage to outrun 'Crolon and 'Drem, but the latter two falsely claim that Tersa and Lnur are conspiring against Ussa.<ref>'''Halo: Broken Circle''', ''pages 124-128''</ref>
*Covenant forces discover the location of the Ussan Sangheili rebels. Former Hierarch Qurlom delivers the news in the middle of the Prophet of Inner Conviction's "trial" in front the other Hierarchs. Inner Conviction is sent to lead a fleet to the Refuge while the Minister of Anticipatory Security is demoted.<ref>'''Halo: Broken Circle''', ''pages 182-183''</ref>
*A [[Covenant fleet]] led by the Prophet of Inner Conviction arrives at the Refuge to destroy the last resistance to the Writ of Union. The Prophet secretly contacts Ussa to try to get him to surrender, but Ussa rejects. After a brief battle between Ussan Sangheili and boarding Covenant Sangheili and Sentinels, Ussa contacts Inner Conviction and tells him to pull back his forces or they will perish with his soldier when he destroys the shield world. Amazingly, he does just that, although he and other Ussans survive in separate sections. The Prophet of Inner Conviction decides not to look for survivors and returns to High Charity in partial failure once more.<ref>'''Halo: Broken Circle''', ''pages 203-205''</ref>

*The [[Covenant]] makes first contact with the [[Lekgolo]] on [[Te]] in the [[Svir system]] while searching for [[Forerunner]] artifacts.<ref>'''[[Halo: Contact Harvest]]''', ''pages 269-271''</ref> The Covenant declares war on the species and the [[Taming of the Lekgolo]] begins upon discovering that the Lekgolo have devoured a majority of the [[Rings of Te]]—the gas giant's artificial [[Wikipedia:Planetary ring|planetary rings]] built by the Forerunners.<ref>[https://www.halowaypoint.com/en-us/universe/species/lekgolo-mgalekgolo-hunter '''Halo Waypoint''': ''Lekgolo/Mgalekgolo'']</ref>

*During one of the first [[Ages of Conversion]], [[Covenant]] forces make first contact with the [[Lekgolo]] on [[Rentus]], a moon of the planet [[Te]].<ref name="catalog">[https://forums.halowaypoint.com/yaf_postsm2988575_Catalog-Interaction.aspx#post2988575 '''Halo Waypoint''': ''Catalog Interaction - Page 39'']</ref><ref>'''[[Halo Encyclopedia]]''', ''page 114''</ref> They discover that many of the Lekgolo worm colonies have literally devoured [[Forerunner]] artifacts and installations, while others eat everything ''except'' Forerunner installations. The Lekgolo initially prove difficult to defeat because of their ability to combine into the powerful [[Mgalekgolo]], however due in part to their superior spaceship technology the Covenant are able to ally with and tame the useful Lekgolo, and exterminate the relic-destroying colonies in what will come to be known as the [[Taming of the Hunters]]. The compliant Lekgolo are incorporated into the [[Writ of Union]] in '''784 BCE'''.<ref>'''Halo Encyclopedia''', ''page 30''</ref>

*In '''648 BCE''', the [[San'Shyuum]] homeworld of [[Janjur Qom]] is allegedly destroyed by a natural stellar collapse.<ref>'''[[Bestiarum]]'''</ref><ref>'''[[Halo Encyclopedia]]''', ''page 113''</ref> The construction of the Covenant capital city and mobile [[space station]] ''[[High Charity]]'' is also completed this year.<ref>'''[[Halo: The Essential Visual Guide]]''', ''page 93''</ref>

==Globalization era==

*In [[wikipedia:Battle of Thermopylae|The Battle of Thermopylae]] of 480 BC, an alliance of Greek city-states fought the invading Persian Empire at the pass of Thermopylae in central [[Wikipedia:Greece|Greece]]. Vastly outnumbered, the Greeks held back the massive army of Persians for three days in one of history's most famous last stands.<ref>[[Wikipedia:Battle of Thermopylae|'''Wikipedia's''' article on Battle of Thermopylae]]</ref>

*A small force led by King [[Wikipedia:Leonidas I|Leonidas]] of [[Sparta]] blocked the only road through which the massive army of Xerxes I could pass. After three days of battle, a local resident named Ephialtes betrayed the Greeks by revealing a mountain path that led behind the Greek lines. Dismissing the rest of the army, King Leonidas stayed behind with 300 Spartans and 700 Thespian volunteers. The Persians succeeded in taking the pass but sustained heavy losses, extremely disproportionate to those of the Greeks. 

*The fierce resistance of the Spartan-led army offered Athens invaluable time to prepare for a decisive naval battle that would determine the outcome of the war. The subsequent Greek victory at the Battle of Salamis left much of the Persian navy destroyed and Xerxes I was forced to retreat back to Asia, leaving his army in Greece under Mardonius, who met the Greeks in battle one last time. The Spartans assembled at full strength and led a pan-Greek army that defeated the Persians decisively at the Battle of Plataea, ending the Greco-Persian War and with it the expansion of the Persian Empire into Europe. This war was shown by [[Deja]] on the first day of [[SPARTAN-II|Spartan]] training.

*The [[Yanme'e]]; a tier 4 civilization, are incorporated into the [[Covenant Empire|Covenant]] as a slave race.<ref>'''[[Halo Encyclopedia]]''', ''page 31''</ref>

*In '''1342''', the [[Covenant]] discovers the [[Kig-Yar]]. Although the Kig-Yar initially attempt to resist absorption into the alliance, they quickly recognize that they are facing a superior force and submit, taking on the role of explorers and traders (and often thieves and smugglers). The Kig-Yar are also motivated by the potential trade and wealth the Covenant can provide.<ref>'''[[Halo Encyclopedia]]''', ''page 115''</ref>

*In '''1552''', the [[San'Shyuum]] began developing technologies that could increase their life spans.<ref>'''[[Halo 3]]''', ''[[Bestiarum]]''</ref>

*The first [[human]]-made [[nuclear weapon]]s are used against an enemy, when the [[United States of America|United States]] drops two atomic bombs on the empire of [[Wikipedia:Japan|Japan]].
*The end of [[World War II]], which was one of the bloodiest and most expensive wars in human history up to that point.
*The [[United Nations]] is formed on [[Earth]] at the end of [[World War II]]. The UN eventually forms the [[United Nations Space Command|UNSC]] in the 2100s, but the UN begins embarking on military and security operations as early as the 1950s. Fifty-one nations originally signed the UN Charter, which governed the "global association of governments facilitating co-operation in international law, international security, economic development, and social equity." By the beginning of the 21st century, practically all the nation-states on Earth are members of the United Nations.

*[[David George]] and [[Aaron Elliot]] found the "[[Society of the Ancients]]".<ref>[http://206.16.223.63/members.html '''Society of the Ancients:''' Members]</ref>

*[[Margaret Efendi]] starts her beekeeping hobby with a single beehive.<ref>[http://www.ilovebees.com/hives.html]"[[Seven]] years ago I started making my own honey and selling it at the Farmer�s market."</ref><ref group="note">This is 7 years ago relative to 2004. Therefore, 1997.</ref>

*[[Margaret Efendi]] buys her second beehive and founds [[Margaret's House of Bees]].{{Citation needed}}

*The [[International Society of Civil Engineers]] is established on [[Earth]].<ref>'''[[Halo 3]]''', multiplayer level ''[[Orbital]]''</ref>

*The [[Unified Earth Government]] is formed as an assembly of political leaders and brilliant minds, commissioned by the [[United Nations]], and tasked with attempting to avert the crises of the next century by solving governmental unification issues of colonizing non-[[Earth]] territories.<ref name="h4evg">'''[[Halo 4: The Essential Visual Guide]]''', ''page 229''</ref><ref name="email">[[Halopedia:Letter - RE: Quick clarification - UEG]]</ref>

*Volume 49 of the [[Journal of Higher Dimensional Physics|''Journal of Higher Dimensional Physics'']] scientific journal is published.<ref>[[Phase 3 Operator's Monologue]]</ref>

*[[Human]]s settle on [[Luna]], [[Mars]], the [[Jovian Moons]], and asteroids.<ref>'''[[Halo Encyclopedia]]''', ''page 32''</ref>

*Humanity concludes a conflict somewhat on par with [[World War II]] and the [[Rain Forest Wars]].<ref>'''[[Halo: Glasslands]]''', ''page 33 ("People in [[1945]]-and 2090, [[2103]], and [[2162]]-could recall what peace felt like and knew what they'd missed. But now there were two generations that couldn't remember a time when Earth wasn't at war with the Covenant.")''</ref>

*Humanity concludes a conflict somewhat on par with [[World War II]] and the [[Rain Forest Wars]].<ref>'''[[Halo: Glasslands]]''', ''page 33 ("People in [[1945]]-and [[2090]], 2103, and [[2162]]-could recall what peace felt like and knew what they'd missed. But now there were two generations that couldn't remember a time when Earth wasn't at war with the Covenant.")''</ref>

*The [[United Nations]] creates the first iterations of the [[Orbital Drop Shock Troopers|ODST]]s.<ref name="wp odst">[https://www.halowaypoint.com/en-us/universe/factions/odst '''Halo Waypoint''' - ''ODST'']</ref>

*In early '''2142''' the Covenant discover the [[Unggoy]] homeworld, [[Balaho]].<ref>''[[Bestiarum]]''</ref> The Unggoy surrender almost immediately in the imposing presence of the [[Sangheili]] and are incorporated into the [[Covenant Empire|Covenant]].<ref>'''[[Halo Encyclopedia]]''', ''page 115''</ref>

*Circa '''2152''',<ref>'''[[Halo 2: Anniversary]]''', ''[[Terminal/Halo 2: Anniversary|Terminal]] [[Terminal/Halo 2: Anniversary/Eleven|#11]]''</ref> the [[Sangheili]] [[Arbiter]] [[Fal 'Chavamee]] refuses to accept the [[Covenant]] [[Covenant religion|religion]] and is charged with heresy by a [[Unidentified Prophet (The Duel)|High Prophet]].<ref name="duel">'''[[Halo Legends]]''', ''[[The Duel]]''</ref>
*By order of the Prophet, a Sangheili named [[Haka]] attempts to bring Fal to ruin.<ref name="duel"/>
*Haka forces [[Roh]], Fal's friend, to murder Fal's wife, [[Han]]. Haka kills Roh shortly after.<ref name="duel"/>
*An army of Sangheili, [[Kig-Yar]], [[Unggoy]], and [[Mgalekgolo]], accompanied by [[Type-26 Wraith]]s and [[Type-32 Ghost]]s, charges against Fal. Fal kills the entire attacking force.<ref name="duel"/>
*Atop a [[Forerunner]] structure, Fal and Haka finally duel. The duel ends with both fighters killed by the other's hand.<ref name="duel"/>
*As a result of Fal's actions, the rank of Arbiter is stripped of its former prestige, and is given only to Sangheili who have brought shame to both themselves and the Covenant until [[2552|four centuries later]].<ref name="duel"/>

*The [[Jovian Moons Campaign]] begins: Jovian [[Frieden]] secessionist attacks on [[United Nations colonial advisers]] on the moon [[Io]] lead to three months of fighting between the [[United Nations]] military and Jovian Frieden forces. Though this is not the first armed conflict in the [[Sol System]], it is easily one of the bloodiest, and is generally considered to be the spark of increased friction and militarization that followed. The conflict escalates tensions, as [[Earth]]'s [[national government]]s, many of which sponsored colonies within the [[Sol system]], begin fighting proxy wars off-planet. As these continue, tensions on Earth mount, leading to a number of armed conflicts on Earth itself.<ref name="timeline">'''[[Xbox.com/Halo]]''' - ''Timeline''</ref>

*[[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.<ref>[http://www.xbox.com/en-US/games/h/halo/storyline.htm Xbox.com]</ref>
*The [[Battle of Delambre]] is speculated to have taken place.<ref>'''[[Halo: The Cole Protocol]]''', ''page 113''</ref>
*The [[United Security Acts of 2162]] and [[Homeland Security Act of 2162]] are created.<ref>'''[[Halo: Ghosts of Onyx]]'''</ref>

*The [[United Nations Space Command]] is established by the [[United Nations]] to eliminate the various [[rebel]] organizations in the [[Sol system]].<ref>'''[[Halo Encyclopedia]]''', ''page 42''</ref>

*The [[Argyre Planitia Campaign]] takes place: In a conflict that stemmed from the [[Rain Forest Wars]], the three primary [[Earth]] factions; the UN, [[Frieden]] and [[Koslovics]] clash again, this time on [[Mars]]. A series of lightning strikes against Koslovic forces near the [[Argyre Planitia]] marks the first extra-terrestrial deployment of [[UNSC Marine Corps|UNSC Marines]]. The campaign is deemed an unqualified success. As a result, future military doctrines favor large contingents of Marines for ground assaults and [[Boarding|ship-boarding]] actions.<ref>'''[[Xbox.com/Halo]]''' - ''Timeline''</ref>

*[[Interplanetary War]]: [[United Nations|UN]]-sponsored military forces begin a pattern of massive build-ups, culminating in the first real interplanetary war. After the successful [[UNSC Marine Corps|Marine]] [[Argyre Planitia Campaign|deployment]] on [[Mars]], recruitment drives and propaganda tactics strongly bolster the nascent [[United Nations Space Command]] forces. UN forces defeat [[Koslovic]] (supporters of rabid [[Communism|communist]] hard-liner [[Vladimir Koslov]]) and [[Frieden]] (a resurgence of [[fascism]]) forces on [[Earth]], and 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.<ref>'''[[Xbox.com/Halo]]''' - ''Timeline''</ref>
*The military novel ''[[A Soldier's Tale: Rainforest Wars]]'' is first published.<ref>'''[[Halo: Ghosts of Onyx]]''', ''page 379''</ref>
*The first UNSC military bioengineering protocols are created, which would later form the basis of the [[ORION Project]].<ref>'''[[Halo Encyclopedia]]''', "chapter 2", ''page 44''</ref>

*The [[UN Genetic Rights Act]], the predecessor to the [[UN Colonial Mortal Dictata]], is extended to the [[Human colonies#Interplanetary age|interplanetary colonies]] this year. It is enacted to prevent abuses by gene tech corporations conducting research outside [[Earth]]'s legal jurisdiction.<ref>'''[[Halo: Mortal Dictata]]''', ''page 101''</ref>

==Colonial and Insurrection era==
*The [[Callisto Treaty]] is signed. The [[Frieden]] and [[Koslovics]] formally surrender to the [[United Nations Space Command|UNSC]], officially ending the [[Interplanetary War]].<ref>'''[[Halo Encyclopedia]]''', ''page 33''</ref>

*The [[Unified Earth Government]] becomes a full-fledged governing entity in the wake of the conflicts of the 2160s.<ref name="h4evg">'''[[Halo 4: The Essential Visual Guide]]''', ''page 229''</ref><ref name="email">[[Halopedia:Letter - RE: Quick clarification - UEG]]</ref> Now, the victors are forced to deal with a less obvious but equally serious threat: overpopulation and a massive military with no enemy to fight. Overpopulation caused by massive population surges in the post-war period, combined with the destruction and famine bred by the [[Rain Forest Wars]], threaten to destabilize the economy in the coming years.<ref>[http://halostory.bungie.org/halostory.timeline.html '''Halo.Bungie.org''': ''Halo Story Page - Halo Story Timeline'']</ref>

*The [[UNSC]]'s [[Office of Naval Intelligence]] is created.<ref name="wp oni">[https://www.halowaypoint.com/en-us/universe/factions/oni '''Halo Waypoint''' - ''ONI'']</ref>

*The [[Unified Earth Government]] gains full autonomy in an effort to maintain [[Earth]]'s power across numerous interplanetary [[Human colonies|colonies]].<ref>[https://www.halowaypoint.com/en-us/universe/factions/ueg '''Halo Waypoint''': ''UEG'']</ref>

*'''April 20th''': [[Wallace Fujikawa]] is born. He will later become the co-creator of the [[Shaw-Fujikawa Slipspace Drive]].<ref>'''[[Halo 3]]''', multiplayer level ''[[Orbital]]''</ref>

*The [[M808 Scorpion]] main battle tank is introduced.<ref name="universe">[https://www.halowaypoint.com/en-us/universe/VEHICLES/SCORPION '''Halo Waypoint''': ''Scorpion'']</ref>

* '''January 20th''': [[Tobias Fleming Shaw]] is born - the co-creator of the [[Shaw-Fujikawa Slipspace Drive]].<ref>[http://www.bungie.net/images/Games/Halo3/Screenshots/DLDUSEKSLKJ/H3_MP_Orbital_ENV-06.jpg Bungie.net Merry Mythic Map Pack]</ref>

*In April, '''2291''', a group of researchers headed by [[Tobias Shaw]] and [[Wallace Fujikawa]]<ref>'''[[Halo: Contact Harvest]]'''</ref> secretly developed the [[Shaw-Fujikawa Slipspace Drive]], 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.<ref>http://www.xbox.com/en-US/games/h/halo/storyline.htm</ref>

*[[New Mombasa]] is selected as [[Earth]]'s first city to have a [[space tether]]: the [[Mombasa Tether|New Mombasa Orbital Elevator]].<ref>'''[[Halo: The Essential Visual Guide]]''', ''page 129''</ref>

*The [[Unified Earth Government]] unveils the first in a line of [[colony ship]]s; 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 [[Shaw-Fujikawa Translight Engine|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, the Inner Colonials are considered the most elite, best, and brightest.<ref>[http://halostory.bungie.org/halostory.timeline.html '''halo.bungie.org''': ''Halo Timeline'']</ref>

*The [[Colonial Administration Authority]] and the [[Colonial Military Administration]] are established as the administrative and military bodies for Earth's colonies, respectively.<ref name="evg">'''[[Halo 4: The Essential Visual Guide]]''', ''page 228''</ref>

*The [[Committee of Minds for Security]] holds a session, discussing the likelihood of hostile extrasolar civilizations and the modeling of first-contact scenarios to deal with such threats.<ref>'''[[Halo: Reach]]''', ''Data pad 1''</ref>

*'''January 14''': Construction of the [[Quito Space Tether]] is completed.<ref>'''[[Halo 3]]''', [[multiplayer]] map ''[[Orbital]]''</ref><ref>[https://twitter.com/bsangel/status/687712440075694080 '''Twitter.com''': ''Today in Halo - 1/14/14'']</ref>

*The [[UNSC Convention on Admiralty Law of 2315|UNSC Convention on Admiralty Law]] takes place in this year.<ref>[http://halo.bungie.net/projects/reach/article.aspx?ucc=intel&cid=27029 '''Bungie.net''': ''CAA FACTBOOK/UNSC UNSC Convention on Admiralty Law of 2315'']</ref>

* '''November 10th''': [[Tobias Fleming Shaw]], the co-creator of the [[Shaw-Fujikawa Slipspace Drive]], dies at age ninety-seven.<ref>[http://www.bungie.net/images/Games/Halo3/Screenshots/DLDUSEKSLKJ/H3_MP_Orbital_ENV-06.jpg Bungie.net Merry Mythic Map Pack]</ref>

*'''February 18th''': [[Wallace Fujikawa]] (the co-creator of the [[Shaw-Fujikawa Slipspace Drive]]) dies at the age of one hundred-two.<ref>'''[[Halo 3]]''', multiplayer level ''[[Orbital]]''</ref>

*In '''2319''', [[AMG Transport Dynamics]] designs the first [[M12 Warthog]] prototype, dubbed the "Z-12". The Z-12 prototype vehicles quickly prove to be popular due to a well-crafted advertising campaign and adept engineering team.<ref name="waypointuni">[https://www.halowaypoint.com/en-us/universe/vehicles/warthog '''Halo Waypoint''': ''Warthog'']</ref>
*Within the first eight months of the Z-12 prototype's existence, AMG receives over three dozen exclusivity contracts. Most of these contracts come from the [[Colonial Military Administration]].<ref name="waypointuni"/>

*Around this year, [[AMG Transport Dynamics]] works with the [[CMA]] and established a deal to cover all of their land-based transportation needs.<ref name="waypointuni">[https://www.halowaypoint.com/en-us/universe/vehicles/warthog '''Halo Waypoint''': ''Warthog'']</ref>
*The Z-12 became integrated into the [[M12 Warthog]]. In addition, a pneumatically-powered swivel mount and armored body panels were added to the vehicle.<ref name="waypointuni"/>
*'''April 13''': The [[ORION Project]] is first initiated. Poor results determine the Office of Naval Intelligence to temporarily put the project on hold. The Project is re-initiated in [[2491]].<ref>'''[[Halo Encyclopedia]]''', "Chapter 2", ''page 44''</ref><ref name="wp spartans">[https://www.halowaypoint.com/en-us/universe/factions/spartans '''Halo Waypoint''' - ''Spartans'']</ref>

*In '''2329''', the [[M12 Warthog|M12 FAV]] becomes the most common all-terrain vehicle in service with the [[UNSC]], closely followed by the [[Mongoose]] and [[Civet]] vehicle lines that were also produced by [[AMG Transport Dynamics]].<ref name="waypointuni">[https://www.halowaypoint.com/en-us/universe/vehicles/warthog '''Halo Waypoint''': ''Warthog'']</ref>
*[[CMA]] personnel begin to refer to the M12 as the "Warthog".<ref name="waypointuni"/>

*The [[Ross-Ziegler Blip]] is discovered by two [[Earth]] geologists.<ref>'''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''', "[[From the Office of Dr. William Arthur Iqbal]]", ''page 519''</ref>
*'''August 22''': [[Hod Rumnt]], the future High Prophet of Mercy, is born.

*The [[Aleria]]n mining union [[Mols'Desias]] is founded.<ref name="Nightfall">'''[[Halo: Nightfall]]''', ''[[Halo: Nightfall: ONI: Trade Barriers|ONI: Trade Barriers]]''</ref>

*'''January 1'''<ref name="Waypoint">[https://www.facebook.com/HaloWaypoint/posts/10152157500052679 '''Halo Waypoint''' - ''Today in Halo: 01/01/2362'']</ref>: The ''[[Odyssey]]'' is launched. The lead ship in the colony vessels, the ''Odyssey''-laden with troops and [[terraforming]] gear-spearheads the colonization of a new world, [[Reach]].<ref>'''[[Halo: The Essential Visual Guide]]''', ''page 151''</ref> This sparks the first wave of [[human]] expansion beyond the confines of the [[Solar System]].<ref>[http://halostory.bungie.org/halostory.timeline.html '''Halo.Bungie.org''': ''Halo Story Page - Halo Story Timeline'']</ref>
*The [[Committee of Minds for Security]] holds a working session to design feasible models for first-contact scenarios with potentially hostile extraterrestrial intelligences.<ref>'''[[Halo: Reach]]''', ''[[Data pads#Data pad 2|Data pad 2]]''</ref>

*'''July 24''': {{CAAShip|Irbid}} claims to have begun the colonization of [[Tribute]] in the [[Epsilon Eridani system]] on this date.<ref name="universe">[https://www.halowaypoint.com/en-us/universe/locations/tribute '''Halo Waypoint''': ''Tribute'']</ref>
*'''August 8''': {{CAAShip|Casbah}} begins colonizing Tribute, which is officially recognized by the [[Unified Earth Government]].<ref name="universe"/>

*In '''2381''', the [[Assembly Majority]] makes a suggestion to the [[Committee of Minds for Security]] that the [[Assembly]] should relay their ideas to humanity indirectly, due to the risk of humans ignoring them if they presented them outright.<ref>'''[[Halo: Reach]]''', ''[[Data pads#Data pad 3|Data pad 3]]''</ref>

*The colonization of the [[Inner Colonies]] is fully underway. There are 210 [[Human]]-occupied worlds in various stages of terraforming, and the population burden across human-controlled space is largely stabilized.<ref>http://www.xbox.com/en-US/games/h/halo/storyline.htm</ref>

*The [[D77-TC Pelican]] enters service with the [[UNSC]].<ref>[https://www.halowaypoint.com/en-us/universe/vehicles/pelican '''Halo Waypoint''': ''Pelican'']</ref>

*'''March 15''': [[Ord Casto]], the future High Prophet of Truth, is born on ''[[High Charity]]''.<ref>'''[[Halo: The Essential Visual Guide]]''', ''page 149''</ref>

*[[Actium]] is colonized by the [[Unified Earth Government]].<ref name="vis">'''[[Halo 4: The Essential Visual Guide]]''', ''page 230''</ref>

*'''March 9th''': The [[Quito Space Tether]], completed in [[2313]], is christened for use and officially named.<ref>'''[[Halo 3]]''', [[multiplayer]] level ''[[Orbital]]''</ref>

*The [[HRUNTING/YGGDRASIL Mark IX Mantis]] enters service with the [[United Nations Space Command]].<ref>[https://www.halowaypoint.com/en-us/universe/vehicles/mantis '''Halo Waypoint''': ''Mantis'']</ref>

*[[Alluvion]] is colonized by humanity.<ref name="universe">[https://www.halowaypoint.com/en-us/universe/locations/alluvion '''Halo Waypoint''': ''Alluvion'']</ref>
*Around this time, the [[M6 series]] enters service with the [[UNSC]].<ref>[https://www.halowaypoint.com/en-us/universe/weapons/magnum '''Waypoint''': ''Magnum'']</ref> The [[M6A magnum]] is first produced.<ref>[http://www.bungie.net/projects/halo3/content.aspx?link=h3pistol Bungie Archive]</ref>

*In '''2415''', [[48452-556-EPN644]], a member of the [[Assembly]], suggests that each of the AIs should occasionally offer themselves to be vivisected by the humans to lower any suspicions the humans might have towards their activities.<ref>'''[[Halo: Reach]]''', ''[[Data pads#Data pad 4|Data pad 4]]''</ref>

*[[Arcadia]] is colonized.<ref>'''[[Halo: The Essential Visual Guide]]''', ''page 12''</ref>

==The Great War era==

==Sources==
<references/>

==Notes==
<references group="note"/>