Halo Universe Timeline
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A chronological timeline of the Halo universe.
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LegendBirthhttp://www.reddit.com/r/halo
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Deathhttp://www.reddit.com/r/HaloStory
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Glassinghttp://www.reddit.com/u/afterbang
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Alternate RealityHalo Media Timeline by CIA391
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Real World Event
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Discontinuity
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YearMonthDayEventHalopedia PageSourceNotes
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~2,000,000,000 BCEN/AN/AThe latest time that the Precursors could arrive in the Milky Way Galaxy.Halo: Warfleet page 8"The beings known as Precursors arrived in the Milky Way galaxy as creators and caretakers billions of years ago."
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500,000,000 BCEN/AN/AThe Precursors accumulated their total knowledge in a vast reserve of rules and a library of experiences.Halo: Silentium page 208"During our debate, the Gravemind hinted at a vast reserve of rules accumulated more than half a billion years ago, a huge library of experiences and disputes codified into the total wisdom of the Precursors."
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15,000,000 BCEN/AN/AApproximate time the Precursors seeded the Forerunners on the world known as Ghibalb.https://www.halowaypoint.com/en-us/universe/species/forerunners
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10,100,000 BCEN/AN/AApproximate time Forerunners first explored Path Kethona.http://www.halopedia.org/Path_KethonaHalo: Silentium page 58
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10,100,000 BCEN/AN/AApproximate time the Forerunner-Precursor war takes place.http://www.halopedia.org/Forerunner-Precursor_warHalo: Silentium page 181
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9,100,000BCEN/AN/AApproximate time the Primordial arrived in the galaxy.Halo: Silentium page 173"The one the Didact questioned on Charum Hakkor arrived on the margins of our galaxy nine million years before."
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1,100,000 BCEN/AN/AApproximate time Boundless passed away.http://www.halopedia.org/Boundless_(Forerunner)Halo: Silentium page 67
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1,100,000 BCEN/AN/AApproximate time the Theoretical rate was forcibly merged with the Builder rate.Halo: Silentium page 67"Soon after her death, her rate had been forcibly merged with the Builders.
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600,000 BCEN/AN/AApproximate time a Forerunner civil war takes place.Halo: Silentium page 104"During one of our interminable civil wars, half a million years before my birth..."
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150,000 BCEN/AN/AForerunners rise as the prominent species in the galaxy by advancing technological discoveries gathered from the remnants left by the Precursors.Halo Encyclopedia
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150,000 BCEN/AN/AApproximate time ancient humanity began to spread their civilization outward along the galactic arm.Halo: Cryptum page 20
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125,000 BCEN/AN/AApproximate time of the construction of the Forerunner capital, Maethrillian.http://www.halopedia.org/CapitalHalo: Cryptum page 296
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110,962 BCEN/AN/AFaber-of-Will-and-Might is born.https://www.halowaypoint.com/en-us/universe/characters/master-builder
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110,255 BCEN/AN/AShadow-of-Sundered-Star is born.https://www.halowaypoint.com/en-us/universe/characters/didact
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110,040 BCEN/AN/AApproximate time of the discovery of The Timeless One.http://www.halopedia.org/The_Timeless_OneHalo: Primordium page 236"Forty years before the last of the Human-Forerunner wars..."
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110,000 BCEN/AN/AApproximate time the Didact spoke to the Primordial.Halo: Cryptum page 342
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110,000 BCEN/AN/AApproximate time of the discovery of the Flood powder.Halo: Cryptum page 268
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110,000 BCEN/AN/AApproximate time the Flood left the galaxy.Halo: Cryptum page 272
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110,000 BCEN/AN/AApproximate time of the beginning of the Human-Forerunner war.http://www.halopedia.org/Human-Forerunner_warHalo: Cryptum page 25
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109,000 BCEN/AN/AApproximate time the Librarian is given the title Lifeshaper.Halo: Silentium page 31"That title came to me just before I walked among the defeated humans at Charum Hakkor."
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109,000 BCEN/AN/AApproximate time of the end of the Human-Forerunner war.Halo: Cryptum page 25
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109,000 BCEN/AN/AApproximate time the Librarian established a research station on Erde-Tyrene.Halo: Cryptum page 17
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106,000 BCEN/AN/AApproximate time Bornstellar's parents are born.Halo: Cryptum page 225
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102,000 BCEN/AN/AApproximate time Maker of Moons is born.Halo: Silentium page 91"Maker was less than two thousand years old."
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101,100 BCEN/AN/AApproximate time the Confirmer began his watch over the San 'Shyuum quarantine system.Halo: Cryptum page 171
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101,100 BCEN/AN/AApproximate time the Librarian discovered a hard copy of Boundless`s studies preserved on Keth Sidon.Halo: Silentium page 67"A century before the Didact entered his Cryptum..."
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101,000 BCEN/AN/AApproximate time the Didact was found in comtempt of the council and ordered to halt the construction of his shield worlds.Halo: Silentium page 47
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101,000 BCEN/AN/AApproximate time the Didact entered a cryptum and was hidden on Erde-Tyrene.Halo: Cryptum page 81
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101,000 BCEN/AN/AApproximate time the original 12 Halos were created.Halo: Primordium page 217
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100,970BCEN/AN/AApproximate time the construction of Audacity is started.http://www.halopedia.org/AudacityHalo: Silentium page 60The construction took ten years. Permission from the Old Council to make the journey took another ten.
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100,960BCEN/AN/AApproximate time the construction of Audacity is completed.Halo: Silentium page 60The construction took ten years. Permission from the Old Council to make the journey took another ten.
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100,950BCEN/AN/AApproximate time the Old Council grants the Librarian permission to make a journey to Path Kethona.Halo: Silentium page 60The construction took ten years. Permission from the Old Council to make the journey took another ten.
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100,950 BCEN/AN/AApproximate time the Librarian visited Path Kethona.http://www.halopedia.org/Path_KethonaHalo: Silentium page 163"After she put you in a Cryptum, and stored the Cryptum on Erde-Tyrene, she commissioned a special ship, assembled a crew, and made a visit to Path Kethona. This was about nine hundred and fifty years ago."
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100,950 BCEN/AN/AApproximate time the Librarian discovers a biological Domain on a planet in Path Kethona.Halo: Silentium page 158
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100,717 BCEN/AN/AApproximate date Soma is born.Halo: Evolutions "Soma the Painter"
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100,300 BCEN/AN/AApproximate time of first contact between the Forerunner Primary Pioneer group and the Flood on G617 g1.http://www.halopedia.org/Primary_Pioneer_GroupHalo 3 Terminals (2)
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100,300 BCEN/AN/ASoma the painter sends a message to the Auditor and Prelate regarding the first landing of the Flood.Halo: Evolutions "Soma the Painter"
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100,200 BCEN/AN/AApproximate time Riser is born.Halo: Cryptum page 35
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100,043 BCEN/AN/AApproximate time 05-032 Mendicant Bias tested Installation 07 at Charum Hakkor.Halo: Primordium page 191
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100,040 BCEN/AN/AThe Anodyne Spirit, known as the Forerunner Dreadnought, is built.https://www.halopedia.org/Anodyne_SpiritHalo: Warfleet page 84
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100,020 BCEN/AN/AApproximate time Splendid Dust of Ancient Suns is born.Halo: Cryptum page 268
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100,020 BCEN/AN/AApproximate time Glory of a Far Dawn is born.Halo: Cryptum page 309
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100,015 BCEN/AN/AApproximate time Adequate-Observer is posted to the mining outpost Seclusion Spiral.Halo: Fractures "Defender of the Storm" page 222"[...] the same picture he'd seen for the past 15 solar years" - Story takes place "a little more than 100,000 years BCE"
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100,012 BCEN/AN/AApproximate time Bornstellar Makes Eternal Lasting is born.http://www.halopedia.org/IsoDidactHalo: Cryptum page 225
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100,010 BCEN/AN/AApproximate time Maker of Moons's father is assassinated.Halo: Silentium page 90"He died ten years ago," she said. "Assassinated at the orders of the Master Builder."
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100,010 BCEN/AN/AApproximate time Seclusion Spiral's collectors are secretly shut down.Halo: Fractures "Defender of the Storm" page 237"[...] this vane of the station has not been used in more than 10 solar years"
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100,000 BCEN/AN/AThe Flood reaches the mining outpost Seclusion Spiral and begins infecting and killing the Forerunners aboard.Halo: Fractures "Defender of the Storm" page 230
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100,000 BCEN/AN/AAdequate-Observer scuttles Seclusion Spiral to destroy the Flood. The station sheds its Flood infected vanes while the hub descends to a relatively calm altitude in the planet's storm. Adequate-Observer is renamed Defender-of-the-Storm by his Ancilla.Halo: Fractures "Defender of the Storm" page 246
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100,000 BCEN/AN/AThe Librarian visits Janjur Qom to collect San 'Shyuum specimens for cataloging.http://www.halopedia.org/Janjur_QomHalo: Cryptum page 172See Note 15 regarding 100,000 BCE dates.
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100,000 BCEN/AN/ABornstellar Makes Eternal Lasting travels to Erde-Tyrene in search of the Organon.Halo: Cryptum page 17
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100,000 BCEN/AN/AThe Didact is released from his cryptum by Bornstellar.Halo: Cryptum page 63
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100,000 BCEN/AN/AThe Didact and Bornstellar discover the ruins on Charum Hakkor.Halo: Cryptum page 102
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100,000 BCEN/AN/ABornstellar undergoes a brevet mutation with the Didact as his sponsor.Halo: Cryptum page 154
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100,000 BCEN/AN/AThe First Prophet is killed by builder forces.Halo: Cryptum page 217
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100,000 BCEN/AN/ABornstellar is sent back to his family, the Didact is taken by the Master Builder, and Chakas and Riser are send to Installation 07.Halo: Cryptum page 218See Note 11.
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100,000 BCEN/AN/AA Halo is fired for the second time in the San 'Shyuum quarantine system.Halo: Cryptum page 275
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100,000 BCEN/AN/ABornstellar departs for Maethrillian to testify against the Master Builder.Halo: Cryptum page 25
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100,000 BCEN/AN/AThe Battle for Maethrillian occurs.http://www.halopedia.org/Battle_of_the_CapitalHalo: Cryptum page 312
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100,000 BCEN/AN/AA Halo is fired for the third time at the Forerunner capital world.Halo: Primordium page 272
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100,000 BCEN/AN/ABornstellar enters a portal from Maethrillian to the Ark.Halo: Cryptum page 322
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100,000 BCEN/AN/ABornstellar meets the Librarian on the Ark.Halo: Cryptum page 338
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100,000 BCEN/AN/AChakas, Vinnevra, and Gamelpar discover a gravemind on Installation 07.Halo: Primordium page 150
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100,000 BCEN/AN/AChakas is reunited with Riser.Halo: Primordium page 181
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100,000 BCEN/AN/AGamelpar passes away.Halo: Primordium page 207
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100,000 BCEN/AN/AThe IsoDidact tracks down the rogue Installation 07.Halo: Primordium page 337
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100,000 BCEN/AN/AInstallation 07 breaks down from 30,000km to 10,000km in diameter.Halo: Primordium page 345
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100,000 BCEN/AN/AChakas is composed and placed in a monitor shell.Halo: Primordium page 350
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100,000 BCEN/AN/AThe IsoDidact executes the Primordial.Halo: Primordium page 366
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100,000 BCEN/AN/AThe Librarian testifies before Catalog.Halo: Silentium page 30
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100,000 BCEN/AN/AThe Ur-Didact encounters a Precursor structure.Halo: Silentium page 95
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100,000 BCEN/AN/APrecursor structures begin to reawaken around the galaxy.Halo: Silentium page 187
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100,000 BCEN/AN/AThe Ur-Didact is corrupted by the Gravemind.Halo: Silentium page 226"I am myself mad!"
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100,000 BCEN/AN/AFaber rescues the Didact from a Burn.Halo: Silentium page 192
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100,000 BCEN/AN/AThe Ur-Didact reunites with Bornstellar, the IsoDidact.Halo: Silentium page 221
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100,000 BCEN/AN/AThe Ur-Didact uses the composer on the human populations on Omega Halo.Halo 4 Terminals
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100,000 BCEN/AN/AThe Precursor structures attempt to destroy the Greater Ark. Omega Halo fires, opening a lane for the IsoDidact to escape.Halo: Silentium page 272
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100,000 BCEN/AN/AApproximate date Faber-of-Will-and-Might is killed in action.Halo: Silentium page 275
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100,000 BCEN/AN/AThe Librarian places the Ur-Didact in a Cryptum on Requiem.Halo 4 Terminals
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100,000 BCEN/AN/AThe Halos are sent from the Lesser Ark to be spread throughout the galaxy.Halo: Silentium page 315
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100,000 BCEN/AN/AThe Librarian passes the title of Lifeshaper on to Chant-to-Green.Halo: Silentium page 318
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100,000 BCEN/AN/AThe Librarian begins construction of a portal from Earth to the Lesser Ark.Halo: Silentium page 324
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100,000 BCEN/AN/A05-032 Mendicant Bias assembles 4.8 million Flood controlled vessels and breaches the Maginot Sphere.Halo 3 Terminals
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100,000 BCEN/AN/AOffensive Bias engages Mendicant Bias.Halo 3 Terminals
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100,000 BCEN/AN/AThe Battle of the Maginot Sphere begins.http://www.halopedia.org/Battle_of_the_Maginot_SphereHalo 3 Terminals
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100,000 BCEN/AN/AThe IsoDidact fires the Halo array killing all sentient life within 3 galactic radii.Halo 3 Terminals
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100,000 BCEN/AN/AMinutes after the array is fired, Offensive Bias' fleet decimates Mendicant Bias' fleet.Halo 3 Terminals
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100,000 BCEN/AN/AThe Battle of the Maginot Sphere ends.http://www.halopedia.org/Battle_of_the_Maginot_SphereHalo 3 Terminals
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100,000 BCEN/AN/AReseeding of the galaxy begins.https://www.halopedia.org/Conservation_MeasureHalo 3 Terminals
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100,000 BCEN/AN/AApproximate date the trial of Mendicant Bias takes place.https://www.halopedia.org/Mendicant_Bias#Trial_and_sentenceTrial of Mendicant Bias
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99,900 BCEN/AN/ABornstellar and the remaining Forerunner begin to reseed the final species in the galaxy: the San'Shyuum.Halo: Fractures "Promises to Keep" page 85"Now, every surviving Forerunner [...] had spent over a century discharging the duty the Lifeshaper had laid upon them."
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99,898 BCEN/AN/ABornstellar and Chant-to-Green replay a message from the Librarian telling them the firing of the Halos will destroy tthe Domain. She tells them if there is any hope to fix it the answer may be in the Forerunner capital.Halo: Fractures "Promises to Keep" page 91"The acclimation continued over the next two years" from ~99,900 BCE
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