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Warhammer 40k - Lexicanum β

Year Event Source
~001.M42 The Blackness sweeps across the Galaxy due to the formation of the Great Rift. Much of the Imperium is cut off from Terra as communication and Warp Travel is rendered nigh-impossible. Daemonic legions assault much of the Galaxy. Eventually, the effects will wear off and the Indomitus Crusade will reclaim much of the Imperium. Warhammer 40,000 8th Edition Rulebook pg.50
~001.M42 The Battle of Lion's Gate. Terra is assaulted by the forces of Khorne in its first major invasion in 10,000 years. Warhammer 40,000 8th Edition Rulebook pg.50
001-~100.M42 The Indomitus Crusade is waged. Dark Imperium (Novel)
Early M42 The Dark Eldar Civil War is waged as Asdrubael Vect attempts to counter the power of the Ynnari Psychic Awakening: Phoenix Rising pg.16-17
Early M42 The Psychic Awakening begins Psychic Awakening: Phoenix Rising pg.4
Early M42 The Salamanders prevent the summoning of Angron on Armageddon. Warhammer 40,000 8th Edition Rulebook pg.52
Early M42 Ghazghkull Mag Uruk Thraka leaves the Octarius War at the head of a fleet of 5 million Greenskin warships to lead against the Imperium. Gathering Storm: Rise of the Primarch pg.27
Early M42 After the 13th Black Crusade and formation of the Great Rift, Perturabo unleashed a thousand armies and coordinated them in a grand strategy against the most heavily defended worlds in Segmentum Obscurus. Codex: Space Marines (8th Edition) pg.32
Early M42 Magnus the Red wages the Invasion of the Stygius Sector.
Early M42 The Siege of the Rock sees Luther freed. Codex: Dark Angels (8th Edition) pg.23
Early M42 The Cerberax Wars between the Necrons and Chaos. Gathering Storm: Fracture of Biel-Tan, Chapter 1: The Dance of Destiny - Addenda Inquisitoria
Early M42 The Battle of Iathglas.
Early M42 The Battle of Ulthwe.
Early M42 The Sky Sentinels are destroyed by Magnus the Red and his Thousand Sons. Warhammer 40,000 8th Edition Rulebook pg.151
Early M42 N'Kisha invades Craftworld Iyanden. Warhammer 40,000 8th Edition Rulebook, pg. 167 - Craftworld Iyanden
Early M42 The Tau Empire wage their Fourth Sphere of Expansion, which is thought lost. Several decades later, contact is re-established through the Startide Nexus and the Fifth Sphere of Expansion is launched. Codex: Tau Empire (8th Edition)
Early M42 Imperial and Ork forces temporarily unite to battle Daemons during the Third War for Armageddon. Warhammer 40,000 8th Edition Rulebook pg.52
Early M42 Catachan defeats a Daemonic invasion. Codex: Space Marines (8th Edition), pg. 20
Early M42 The Devastation of Baal by Hive Fleet Leviathan.
Early M42 Asdrubael Vect is "assassinated", only to be reborn as a Living Dark Muse. Codex: Drukhari (8th Edition), pgs. 46-47
M42 The Dark Eldar Civil War begins Psychic Awakening: Phoenix Rising pg.17
M42 Kor Phaeron initiates the Talledus War Psychic Awakening: Faith and Fury pg.9
M42 The Blood Angels initiate the Angel's Halo campaign Psychic Awakening: Blood of Baal pg.9
M42 The Dark Eldar Raid Saim-Hann Psychic Awakening: Phoenix Rising pg.12
M42 The Ynnari battle the forces of Slaanesh in the Battle of Iathglas Psychic Awakening: Phoenix Rising pg.22
001-025.M42 The War of Beasts on Vigilus
005.M42 To Serve the Emperor: A Commissar's Life, written by Commissar Ciaphas Cain is published. The writing of his memoirs spurred him to gather and write a full archive of his glorious career. However, this more candid memoir never sees the light of day, being immediately put under Inquisitorial seal by order of Inquisitor Amberley Vail. The archive simply contains far too much sensitive and restricted information. She organizes the archive, naming it the Cain Archive, and publishes it "for Inquisitors" only. A high number of Inquisitors read it. She is even persuaded to expand it considerably, making it somewhat of a bestseller among the Inquisition. For The Emperor (Novel) by Sandy Mitchell, Editorial Note before Chapter One
006.M42 The fall of Medusa V occurs. The world was mostly evacuated by the Imperium whilst a warp storm engulfed it. [Needs Citation]
012.M42 The Mantis Warriors and an Imperial Navy taskforce come to the aid of the planet Herodian IV, which is under attack from a Tyranid splinter fleet. Despite taking heavy losses they begin to turn the tide of the battle against the Tyranids, when Inquisitor Lord Brutius Parthon orders the Mantis Warriors to perform an Exterminatus on the planet; after a Deathwatch Kill-Team was extracted from a hidden Ordo Xenos weapons laboratory on Herodian IV's surface. Warrior Brood (Novel) by C.S. Goto - Kill Squad: A Deathwatch Omnibus, Chapter 6, pg. 79 and Epilogue, pgs. 163-165
037.M42 The Return of the Liberator: Ciaphas Cain and the Second Siege of Perlia by Orten Bassit is published. It is later used by Amberley Vail as an extract within the Cain Archive. Cain's Last Stand (Novel) by Sandy Mitchell, Editorial Note after Chapter Five
085.M42 Purge the Guilty! An impartial account of the liberation of Gravalax by Stententious Logar is published. It is later used by Amberley Vail as an extract within the Cain Archive. For the Emperor (Novel) by Sandy Mitchell, Editorial Note after Chapter Two
087.M42 Just Visitin': The Life of a Naval Hero by Nelson Lawford is published, a biography of retired Imperial Navy Commodore Hubert Visiter. It is later used by Amberley Vail as an extract within the Cain Archive. Cain's Last Stand (Novel) by Sandy Mitchell, Editorial Note after Chapter Fifteen
095.M42 The Abominable Chitin: a Concise History of the Tyrannic Wars by Arten Burrar is published. It is later used by Amberley Vail as an extract within the Cain Archive. Duty Calls (Novel) by Sandy Mitchell, Editorial Note after Chapter Five
097.M42 Like a Phoenix From the Flames: The Founding of the Valhallan 597th, written by Lady General Jenit Sulla (retired) is published. Amberley Vail uses extracts from it multiple times within the Cain Archive. For The Emperor (Novel) by Sandy Mitchell, Editorial Note after Chapter Eight
~100.M42 The Indomitus Crusade ends after the Battle of Raukos Dark Imperium (Novel) Chapter 7
~100.M42 The Plague Wars. Dark Imperium (Novel)
~100.M42 200 members of the Space Wolves 13th Great Company displaced from the Horus Heresy are recovered from Warp Portals on Prospero. Ashes of Prospero (Novel) - Chapter 17
101.M42 Like a Phoenix on the Wing: The Early Campaigns and Glorious Victories of the Valhallan 597th, written by Lady General Jenit Sulla (retired) is published. Amberley Vail uses extracts from it multiple times within the Cain Archive. The Traitor's Hand (Novel) by Sandy Mitchell, Editorial Note after Chapter Five
127.M42 In Blackest Night: The Millennial Wars Appraised by Ayjaepi Clothier is published. It is later used by Amberley Vail as an extract within the Cain Archive. Cain's Last Stand (Novel) by Sandy Mitchell, Editorial Note after Chapter Four


M41 Timeline