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M40

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Undated M40

Year Event
???.M40 Salt Desert Campaign[2]
Late M40 Chaos forces steal the designs for a new pattern of Imperial ship en-route to Mars during the Monsk Conspiracy.[3a]

0 - 99.M40

Year Event
010.M40 The Orpheus Sector begins rebuilding after its devastating War of Faith. Libethra is gifted to the Angels Revenant for their role in the war. The "sleepers of Orpheus" gradually fade into myth and legend.[4]
052.M40 The Necron Olotep Dynasty awakens to find its planet Cocholos dead. The dynasty's Lords drive their warriors through twisting passageways and encounter the Daemon Prince Beublghor, who had slaughtered the human population and hollowed out the core for his throne. Beublghor's forces crush the Necrons and take their heads as trophies.[5]

100 - 199.M40

Year Event
101.M40 The Star Phantoms home world of Haakonath is lost to an enormous Hrud migration, although around one third of the Chapter's forces are able to escape.[6d]
109.M40 The Dennar IV Suppression. The Howling Griffons defeat a Chaos Cultist uprising on Dennar IV.[1c]
123.M40 The "Threefold Curse": Battlefleet Calixis loses Fire of Heaven and two of the original Chalice-class battlecruisers fighting xenos in the Hazeroth Abyss. Two watch stations are also destroyed. No trace of the unknown xenos is ever found.[7a][7b]
137.M40 The Executioners Chapter slays the heretic Rogue Trader Hektor Revvokan. His ship, the Night Hag, is cleansed and refitted to suit the Chapter's needs.[6b]
140.M40 The Death Spectres are ambushed by the Kabal of the Envenomed Thorn during an offensive on Vern IV, losing almost all of their Predator Destructors. After the intervention of the Void Dragons pirate fleet, the Space Marines are forced to retrofit a dozen Rhinos to Predators.[8]

200 - 299.M40

Year Event
228.M40 The Fire Hawks Chapter carry out the First Castigation of Golgotha.[1a]
232.M40 The Bone Curse: The Haemonculi of The Hex learn of the Black Dragons' mutations and with the help of Duke Sliscus, attack the Chapter in the Donorian System. After a vicious battle, several of the most mutated Black Dragons are captured and brought back to Commorragh. After multiple experiments, an osseovirus is developed that can birth bone 'dragons' from its host's flesh, resulting in the weapon known as the Ossefactor.[27]

300 - 399.M40

Year Event
300-307.M40 The Aschen War.[6c]
319.M40 Evil Sunz warboss Badrok Gutgouga unifies the orks of the Shattered Deeps and threatens a Waaagh! Imperial Guard Konig Armoured Regiments corner his forces at Lysmarchus and crush his forces in a gruelling seven-month campaign. Gutgouga's broken corpse is displayed on the spire of the Red Cathedral of Amraphel.[4]
365.M40 Two Valhallan Polar Guard regiments drive the Demiurg out of the Poretta system.[9]
389.M40 Imperial governor Calid Braygan of Locara colony, Drusus Marches, Calixis Sector, is executed by quartering for heretical dealings with the Servants of Twilight.[10]

400 - 499.M40

Year Event
411.M40 End of the Fenright Tithe Wars.[1b]
433.M40 The High Autarch of the planet Krieg declares independence from the Imperium. Colonel Jurten of the Krieg 83rd turns the planet into an atomic wasteland to eliminate the heresy.[11a]
440.M40 Pirate Lord Havax the Cruel terrorizes convoys along the Drusus Marches while his friends in the Lucid Court shield him from reprisal. Navy Admiral Halifax Stophes and Ordo Hereticus Inquisitor Medina grant First Lieutenant Calaphas Zanatov a Turbulent-class frigate and a Warrant of Trade, respectively, with the intent that the new rogue trader will hunt the pirate himself.[12]
454.M40 Defence of Balle Alpha[3x]
474.M40 War Trader Zanatov ambushes Havlax the Cruel's battleship at 41 Pry. After a three-day battle, Zanatov mounts Havlax's corpse on his ship's power ram. Zanatov declines an offer of captaincy in the Imperial Navy and remains a rogue trader, disappearing into the Maw.[12]
485.M40 The Alpha Legion invades Ghorstangrad. Hypnotic warfare activates the sleeper agents placed among the population and the Emperor's Swords Space Marines. Within hours, the world is devastated and the Emperor's Swords are effectively destroyed. The Alpha Legion withdraws to the Eastern Fringe with loyalist gene-seed and plenty of new recruits.[13]

500 - 599.M40

Year Event
550.M40 The Alpha Legion and Night Lords instigate an uprising that destroys Grymm's Landing, a Dark Angels recruiting world.[14]
555-570.M40 The White Sorrows occur in which Xenos Corsairs led by an alliance of Eldar renegades and the Butcher Archon raid The Periphery. Defeated in 570.M40 by a composite Rogue Trader Imperial Navy force led by Kobras Aquairre.[7b]
561.M40 Nexxas Exculpation. An Emperor's Children invasion is defeated by a complete Imperial army corps. To maintain secrecy, the corps is afterwards bombarded and destroyed from orbit by an Ordo Malleus war ship. Imperial records were revised to blame the slaughter on renegade Eldar.[15]
567.M40 First mention of Darnath Lysander of the Imperial Fists in the Liber Honorus Imperial Fists after his victory at the Battle of Colonial Bridge on Iduno.[16a]
580-591.M40 The Orpheus Sector raises thirty-nine million soldiers to answer the call to arms for the Great Severan War. The Morros Lachrymal penitentiary is converted from mining to a penal legion training facility.[4]
585.M40 Darnath Lysander takes command of the Second Company of the Imperial Fists after capturing the Eldar cruiser Blood of Khaine.[16a]

600 - 699.M40

Year Event
600.M40 Ork warboss Garskrak picks a fight with Vior'la sept. The Tau lure his army into the plasma storm between Vior'la's twin suns, where he is incinerated.[17]
617.M40 Draxian Incursion - all records expunged by Inquisition.[18]
619.M40 The Decarchs of Decapolis conspire to replace Amarah as the capital world of the Orpheus Sector. The Ordo Hereticus uncovers the conspiracy while interrogating Celestarii cultists. The architects of the conspiracy are hunted down, purged, and put on show trial over the course of nine years. Authorities on Amarah enact punitive fines and restrictions on Decapolis, doing little to alleviate the unrest the conspiracy has fuelled.[4]
643.M40 Garanhir Rebellion[18]
649.M40 Inquisitor Malachi Heritor creates the Pyroclast order.[19]
656.M40 The warp rift named the Hadex Anomaly appears in the center of Jericho Reach, becoming instantly visible across the Ultima Segmentum, despite the laws of the physical universe.[26]
675.M40 Hive World Vidium lost to Dark Eldar. [Help]
676.M40 When Blood Angels Strike Force Alenso succumbs to the Red Thirst and throws itself into the green tide on the moon of Tytus, the Elysian 46th Airborne rescues them from disaster.[20]
688-690s.M40 Second Abonian Genocide - Inquisitor Halan Jentz of the Ordo Hereticus declares the entire population of the Abonian Sub-Sector diabolos inculcatus and subsequently leads a crusade to kill them all.[18]

700 - 799.M40

Year Event
700.M40 Approximate start of Kroot expansionist phase. [Help]
738-741.M40 The War of Brass occurs as the Hive Worlds of the Gelmiro System erupt in rebellion under the Emperor of Brass. Battlefleet Calixis led battleship Fist of Adamant under Vice-Admiral Dayes as well as Space Marine and Titan elements to pacify the region. On the defense, the region devolved to Chaos worship. The planets are designated War Worlds as of M41.[7c]
745.M40 Trial and execution of Inquisitor Lord Godella Morn, founder of the Oblationist faction of the Inquisition.[21]

800 - 899.M40

Year Event
827.M40 Ultramarines Shield Bearers of Alutia take a warrior pilgrimage through Ryza, Catachan, and Arkios.[16b]
896.M40 The Thraxians, Greet, and Formosians join the T'au Empire. The Hrud and Arachen reject the Water Caste envoys and are driven out of the region.[17]

900 - 999.M40

Year Event
901.M40 The Mantis Warriors Space Marine Chapter lure the Dark Eldar reavers known as the 'Slave Lords' into an ambush on Tranquility.[6a]
917.M40 The Imperial Navy founds Port Wander as a staging ground for investigations into the loss of vessels on the fringes of the Drusus Marches.[22a]
924.M40 The Vindicare Assassin Morias Skult destroys a Gargant and terminates Warlord Urgak the Unstoppable on Roxanzand.[23]
949.M40 Krieg officially returns to the rule of the Imperium. The Departmento Munitorium finds the planet's tithes in arrears and Krieg presents twenty fully-prepared regiments for immediate deployment.[11b]
989.M40 Yme-Loc Eldar Craftworld is first detected in Segmentum Obscurus, West Quadrant.[24]
995.M40 The Macharian Crusade begins.[25]
999.M40 Rogue trader Purity Lathimon rediscovers the Koronus Passage.[22a]


M39 Timeline M41

Sources