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M31
From Lexicanum
|
| Year | Event | Source |
| Fall of the Eldar. Slaanesh is born, consuming millions of Eldar souls. Eldar society collapses completely. Slaanesh becomes the nemesis of the Eldar, ever-hungry for their souls. The Eldar homeworlds are lost when the Eye of Terror erupts around them.
(Canon Conflict) (Realms of Chaos: The Lost and the Damned, article The Titan Legions by Rick Priestley in White Dwarf 178 (UK), Renegades by Andy Chambers, Jervis Johnson & Rick Priestley states that the fall took place in M29) |
Codex: Dark Eldar (5th Edition) pg 20 | |
| Some Eldar manage to escape on board Craftworlds and undergo a huge social reform, retaining the name of Eldar. The Exodites survive largely unharmed as their colonies are too distant from the former center of Eldar civilization. Some Eldar manage to flee into the Webway, later becoming the Dark Eldar. Numerous Human psykers die due the psychic shock wave engulfing the galaxy. As the Eldar civilization is all but destroyed, the Warp storms finally end with a single storm of massive proportions.
(Canon Conflict) (Realms of Chaos: The Lost and the Damned, article The Titan Legions by Rick Priestley in White Dwarf 178 (UK), Renegades by Andy Chambers, Jervis Johnson & Rick Priestley states that the fall took place in M29) |
Codex: Dark Eldar (5th Edition) pg 20 | |
| 006.M31 | Earliest estimated timeframe in which Imperial governor Vardus Praal of Isstvan III forsakes his oath to the Imperium. | The Horus Heresy Book One - Betrayal pg.40 |
| 7.854.007.M31 | Veridian Mandeville relay station Tertius receives a message from Ultramarines Captain Alcheios requesting confirmation of mission parameters for the Gazlak Campaign. | Mark of Calth: The Underworld War epilogue |
| The Thousand Sons bring Twenty-Eight Sixteen (Aghoru) to compliance. | A Thousand Sons Book One | |
| 010.M31 | The Alpha Legion responds to the 670th Expeditionary Fleet's request for aid in the Nurth campaign. The planet is lost when the Nurthene activate a Black Cube. Half the Imperial Army forces and six Titans are left behind in the emergency evacuation. | Legion Part One, Part Two Chapter One |
| 011.M31 | The Thousand Sons, Space Wolves, and Word Bearers bring the Ark Reach Cluster to compliance. | A Thousand Sons, Chapters 11-14 |
| The Luna Wolves and Blood Angels exterminate the nephilim on Melchior. | Fear to Tread Prologue | |
| The Emperor of Mankind leads the Ullanor Crusade against the Ork warboss Urrlak Urruk, breaking the largest Ork empire in the galaxy. At the triumph celebrating the victory, the Emperor names Horus his Warmaster, renames the Luna Wolves the Sons of Horus, and retires to Terra. | Index Astartes: Black Legion; Horus Rising by Dan Abnett; A Thousand Sons Chapters 15-16 | |
| The Cleansing of Laeran. | Fulgrim Part One | |
| The 40th Expeditionary Fleet and the Space Wolves destroy the Olamic Quietude. | Prospero Burns Chapters 5-7 | |
| 012.M31 | John Grammaticus leads the Alpha Legion to 42 Hydra Tertius to meet with the Cabal. After the meeting, the Alpha Legion battle barges Alpha and Beta destroy the 670th Expeditionary Fleet. | Legion Part Two |
| The 203rd year of the Great Crusade and less than a year after Ullanor. The 63rd Expeditionary Fleet brings 63-19 to compliance. The fleet responds to bring aid to the Blood Angels on One Forty-Twenty, bringing the Imperium into contact with the Interex. | Horus Rising | |
| The 88th Expeditionary Fleet, Alpha Legion, and Blood Angels begin a campaign against an ork empire in the Kayvas Belt that will take thirteen months to complete. | Fear to Tread Chapter 1 | |
| The Emperor's Children and Iron Hands destroy the Diasporex at the Battle of the Carollis Star. | Fulgrim Part Two | |
| The Council of Nikaea is convened to determine the fate of Space Marine Librarians. The Emperor concludes that all Librarians must return to their battle companies and cease using their psychic powers. Magnus the Red is ordered to cease his study of sorcery. | A Thousand Sons Chapters 18-20; Prospero Burns Chapters 9-11 | |
| Beginning of the Horus Heresy. Horus recovers from his wounds under the care of the Serpent Lodge on Davin by swearing allegiance to Chaos. Magnus the Red fails to dissuade him and attempts to warn the Emperor through forbidden sorcery, damaging the Golden Throne and psychic infrastructure on Terra in the process.
(Canon Conflict) The Outcast Dead depicts Magnus's warning to the Emperor as occurring after the Drop Site Massacre. |
False Gods by Graham McNeill, Part Two-Three; A Thousand Sons Chapters 23-25; The Outcast Dead Chapter 8 | |
| The Battle of Tarsus. The Emperor's Children subsequently destroy Eldar Maiden Worlds in the Perdus Anomaly with virus bombs. | Fulgrim Part Three | |
| Horus brings the Imperium into conflict with the Auretian Technocracy, eventually exterminating it. | False Gods by Graham McNeill Part Four; Fulgrim Part Four | |
| The Emperor sends Leman Russ and his Space Wolves to Prospero to arrest Magnus the Red for violating the Edict of Nikaea. The Space Wolves destroy the planet but Magnus escapes, taking the remaining Thousand Sons on Prospero to the Planet of the Sorcerers. | A Thousand Sons by Graham McNeill Chapters 27-31; Prospero Burns by Dan Abnett Part Three; Space Wolf (Novel) by William King, Chapter 17 | |
| 013.M31 | Horus orders Sanguinius to take his entire legion to the Signus cluster in the Northern Cross to liberate it from the nephilim. | Fear to Tread Chapter 2; Horus Heresy: Collected Visions pg. 171 |
| Horus orders Roboute Guilliman to redeploy his fleet from Saturn to the Veridian system in preparation to engage an ork incursion. Guilliman orders his fleets to rendezvous at Calth. | Horus Heresy: Collected Visions pg. 158 | |
| Ordered to suppress the rebellion of the Imperial governor of the Isstvan system, Horus purges the Legions under his command from all suspected loyalists. He deploys them on Isstvan III and then virus-bombs the planet from high orbit. A few manage to survive inside bunkers, forcing the traitors to land and fight. The Imperial cruiser Eisenstein manages to flee with news of Horus's rebellion, warning the Emperor. | Galaxy in Flames; Flight of the Eisenstein | |
| Schism of Mars. The Dark Mechanicum wrests control of Mars from the Adeptus Mechanicus. | Mechanicum | |
| Olympia rises up against the Imperium following the death of Dammakos. Perturabo leads the Iron Warriors to crush the uprising, killing five million civilians before order is restored. | Index Astartes: Iron Warriors | |
| Seven legions arrive in orbit of Isstvan V to bring Horus to task. After the ensuing Drop Site Massacre, Ferrus Manus is dead and Vulkan is missing. Corvus Corax leads guerrilla fighting until his fleet can arrive and save the devastated loyalists. About half of the Imperial military defects to Horus's side. | Codex: Space Marines (3rd Edition); Fulgrim Chapters 23-25; Deliverance Lost | |
| The Siege of Lesser Damantyne. Iron Warriors loyal to the Emperor fight their traitor brethren in a siege lasting a year and a day, Terran standard. | Age of Darkness: The Iron Within | |
| The Battles of Phall and Signus Prime. | The Crimson Fist; Fear to Tread | |
| Fulgrim and Perturabo enter the Eye of Terror in pursuit of an Eldar weapon. Fulgrim ascends to daemonhood. | Angel Exterminatus | |
| 014.M31 | An Ultramarines strike force destroys the Word Bearers ship Furious Abyss before it can attack Macragge. The World Bearers ambush the Ultramarines' mustered fleet over Calth. | Battle for the Abyss; Know No Fear; Mark of Calth: The Underworld War |
| Town 44 on Virger-Mos II agri-world succumbs to panic when it receives word of the Emperor's defeat. | Age of Darkness: Liar's Due | |
| The Dark Angels and Night Lords battle on Tsagualsa during the Thramas Crusade. | Age of Darkness: Savage Weapons | |
| The Alpha Legion attacks the Space Wolves near Chondax. Jaghatai Khan receives a request for reinforcements from Leman Russ and an order from Rogal Dorn to return to Terra immediately. The White Scars withdraw, sending a message to Russ to do the same. | Horus Heresy: Collected Visions pgs. 344-345 | |
| En route to Terra, the Destroyer Plague hits the Death Guard. Mortarion swears allegiance to Nurgle to alleviate his legion's suffering. | Horus Heresy: Collected Visions pgs. 347-349 | |
| 018.M31 | Baal receives word from Raldoron in the Signus cluster that the Blood Angels legion still exists, narrowly averting their dissolution by order of Malcador. | Lost Sons |
| 019.M31 | Battle of Terra. Horus lays siege to the Emperor's Palace for fifty-five days. The Emperor, Sanguinius, and Rogal Dorn teleport onboard Horus's Battle Barge Vengeful Spirit. Horus kills Sanguinius and the Emperor utterly obliterates him. Rogal Dorn carries the mortally wounded Emperor to the Golden Throne to keep him alive. | White Dwarf 161 (UK); White Dwarf 267 (US) article Assault on Holy Terra |
| Great Scouring. Loyalists gradually re-conquer the Imperium. Chaos forces retreat into the Eye of Terror. | Warhammer 40,000 Rulebook (5th Edition) pg. 124; Warhammer 40,000 Rulebook (6th Edition) pg. 168 | |
| Luther betrays Lion El'Jonson upon the Lion's return to Caliban. In the ensuing fight, Caliban is split apart and El'Jonson vanishes while Luther is captured. He is kept in a stasis field inside The Rock, the largest remaining piece of Caliban and the new homebase of the Dark Angels. | Index Astartes: Dark Angels; Codex: Dark Angels (4th Edition) pgs. 8-9 | |
| Roboute Guilliman compiles the Codex Astartes, which lays down the new organizational doctrine for Space Marine chapters. | Index Astartes: Codex Astartes | |
| 026.M31 | Second Founding. The nine loyal Space Marine Legions are divided into forty new chapters during the Great Scouring. The Grey Knights are secretly created and designated Chapter 666. | Warhammer 40,000 Rulebook (6th Edition) pg. 168; Deathwatch: Rites of Battle pg. 53; Index Astartes: Grey Knights and Deathwatch |
| ca. 090.M31 | Jaghatai Khan and the White Scars First Brotherhood disappear in pursuit of Dark Eldar on Corusil V, near the Maelstrom. Chapter lore states that the Khan pursued a Dark Eldar Archon through a Webway portal. | Index Astartes: White Scars |
| 120.M31 | The High Lords of Terra allow the Dark Angels to establish numerous recruiting worlds. | Codex: Dark Angels (6th Edition) pg. 22 |
| 216.M31 | Leman Russ vanishes on the day of the Feast of the Emperor's Ascension, taking all his favoured warriors with him except for Bjorn. | Codex: Space Wolves (5th Edition), p. 21 |
| 223.M31 | The Wolf Lords of the Space Wolves elect Bjorn as Great Wolf. Bjorn leads the Chapter's first Great Hunt in pursuit of their missing primarch and returns in failure. | Ibid. |
| 356-372.M31 | Vindicator created during third Rothern I pacification of the Great Heresy. | White Dwarf 231 (UK) |
| 427.M31 | Primarch Rogal Dorn is killed aboard the Sword of Sacrilege. | Space Marine (Novel) |
| 580.M31 | The Dark Angels and two of their successor chapters engage in the Forgotten Wars against the agents of the Ruinous Powers. | Codex: Dark Angels (6th Edition) pg. 22 |
| ca. 781.M31 | The 1st Black Crusade. On Uralan, Abaddon the Despoiler secures the daemon weapon Drach'nyen. The First Battle of Cadia. | Codex: Chaos Space Marines (3rd Edition, 2nd Codex); Codex: Chaos Space Marines (6th Edition) pg. 22 |
| 893.M31 | Scribe First Order Wendel Voss records the Cleansing of Laeran in which the alien Laer are wiped out by the Emperor's Children led by Fulgrim. (Canon Conflict) (The Horus Heresy book Fulgrim depicts this happening during the Great Crusade.) |
White Dwarf 255 (UK), Fulgrim (Novel) |
| M30 | Timeline | M32 |
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