1,286
edits
Changes
From Warhammer 40k - Lexicanum
M41
,Started page overhaul
!Year
!Event
|-
|rowspan=5|019.M41
|Far eastern rim of the [[Galaxy]] assaulted by an [[Ork]] [[Waaagh!]]|{{CME}}
|-
|Two [[High Lords of Terra]] assassinated.|{{CME}}
|-
|[[Saint Drache]] martyred on [[Korynth]].|{{CME}}
|-
|Billions die due to famine on [[Beznos]].|{{CME}}
|-
|The infamous [[heretic]] [[Pontius Glaw]] is first touched by the [[Warp]].{{Fn|[[Malleus (Novel)]], Chapter Twenty6b}}
|-
|050.M41
|[[Clan Raukaan]], [[Clan Avernii]], [[Clan Dorrvok]], and [[Clan Garrsak]] of the [[Iron Hands]] Chapter assault an [[Eldar]] dig site on [[Dawnbreak]]. After destroying the [[Craftworld Alaitoc]] force protecting the site, they claim the relics for themselves and abandon the planet and its defenders, the [[17th Catachan Army Group]], to Eldar reprisals. {{Fn|[[Clan Raukaan - A Codex: Space Marines Supplement (6th Edition)]], ''Slaughter on Dawnbreak''7a}}
|-
|071.M41
|[[Relief of Hive Ferax]]{{Fn|[[Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes]], pg. 198a}}
|-
|085.M41
|By request of [[Inquisitor]] [[Scallen]], [[Sisters of Battle]] of the [[Order of the Valorous Heart]] purge [[Hive Tumulus]] (on planet [[Farglum]]) of the [[Cult Epicurian]].|[[Chapter Approved 2001]]{{CMEFn|10}}
|}
!Year
!Event
|-
|123.M41
|[[Clan Raukaan]] of the [[Iron Hands]] defeat a group of [[Dark Eldar]] slavers in the [[Hundharr Cluster]] by using a number of civilian workers as bait for a trap. |[[Clan Raukaan - A Codex: Space Marines Supplement (6th Edition)]]{{CMEFn|7x}}
|-
|139.M41
|[[Abaddon the Despoiler]]'s forces complete construction of the [[Planet Killer]] in the [[Eye of Terror]].|{{CME}}
|-
|139-160.M41
|Abaddon uses the Planet Killer to lead the [[12th Black Crusade]] that ravages the [[Gothic Sector]], known later as the [[Gothic War]].|{{CME}}
|-
|143.M41
|The [[Jorun Retaliation]]. The [[Howling Griffons]], [[Ultramarines]] and [[Sons of Orar]] Chapters defeat the [[Cabal of the Crimson Libation]] and their ex-[[Imperial Guard]] slaves. [[Chaplain]] [[Armand Titus]] of the Howling Griffons is interred within a [[Dreadnought]] sarcophagus after succumbing to the Xenos poisons.{{Fn|3}}
|-
|rowspan=2|143-151.M41
|[[Magdellan Prime Civil War]]{{Fn|[[Imperial Armour Volume Two - Second Edition]], pg. 208b}}
|-
|Fall of [[Betalis IV]] to forces of [[Chaos]]. [[Battle Sisters]] of the [[Order of the Ebon Chalice]] helped to evacuate [[Ecclesiarchy]] officials and sacred relics{{Fn|[[Imperial Armour Volume Two - Second Edition]], pg. 208b}}
|-
|154.M41
|The [[Planet Killer]] is finally destroyed. No traces of the remains are found by Inquisitor [[Horst]]'s investigation 2 years later.|{{CME}}
|-
|179.M41
|[[Rogue trader]] [[Veronique Renuka]] is declared an outlaw for her involvement in a coup attempt on [[Cyclopia]].{{Fn|[[Rogue Trader Core Rulebook]], pg. 3629i}}
|-
|189.M41
|''[[Eternal Praetorian]]'' is lost with all hands while searching for a stable route into the [[Koronus Expanse]].{{Fn|[[Rogue Trader: Into the Storm]], pg. 16511}}
|}
!Year
!Event
|-
|201.M41
|The genocidal madman [[Kobras Aquairre]], last of the Aquairre [[rogue trader]]s, disappears into the [[Rifts of Hecaton]].{{Fn|[[Rogue Trader Core Rulebook]], pg. 3629i}}
|-
|211.M41
|A [[Meritech Clan]] raid on a trio of [[Battlefleet Calixis]] ''Sword''-class frigates triggers a fifteen-year war that ends with the destruction of Meritech clan strongholds.{{Fn|[[Rogue Trader: Battlefleet Koronus]], pgs. 28 & 5612a}}{{Fn|12b}}
|-
|213.M41
|'''Invasion of Castaburg''': [[Warboss|Warlord]] [[Skarmork]]'s [[Ork]]s invade [[Castaburg]]. The [[Death Korps of Krieg]] counterattack.|{{CME}}
|-
|220.M41
|[[Explorator Fleet Hydrax-Lamda-15]] discovers an Ork [[Terror Ship]] adrift in space. The ship is devoid of life, but contains the corpses of hundreds of Orks. A standard bearing the words '[[Carcharodon Astra]]' is found atop a mound of bodies several metres high.{{Fn|[[Imperial Armour Volume Ten - The Badab War - Part Two]], pgs. 118–11913d}}
|-
|241.M41
|The [[Helican subsector]] capital is moved to [[Thracian Primaris]] from [[Gudrun]] when it overtakes the latter as the preeminent world of the [[subsector]].{{Fn|[[Malleus (Novel)]] - [[Eisenhorn (Omnibus)]], Chapter Two, pg. 2896a}}
|-
|248.M41
|[[Asdrubael Vect]] seals the [[daemon]]-summoning [[Dark Eldar]] [[Archon]] [[Ysclyth]] into his own territory. The daemons tear apart Ysclyth and his [[kabal]].{{Fn|[[Codex: Chaos Daemons (6th Edition)]], pg. 2214b}}
|-
|249.M41
|[[Battle of Columnus]] - The Forge World [[Columnus]] is assaulted by the [[Ork]] [[Waaagh!|Weirdwaaagh!]] led by the [[Weirdboy]] [[Zagdakka]]. [[Iron Hands]] [[Clan Raukaan]], a [[Raven Guard]] [[Space Marine Company|Shadow Company]], and the entire [[Legio Ferrax]] [[Titan Legion]] are among the defenders. The Orks are defeated and Zagdakka killed, though at the cost of the entire Raven Guards company and [[Shadow Captain]] [[Stenn]], who were used as bait for the Ork Warlord and allowed to die by Warleader [[Kristos]]. |[[Clan Raukaan - A Codex: Space Marines Supplement (6th Edition)]]{{CMEFn|7x}}
|-
|260.M41
|As a result of Warleader [[Kristos]]' actions on Columnus, seen to be not of logic but the settling of a score with the Raven Guard, the [[Kristosian Conclave]] is called on Medusa to debate his actions there, but the conclave expands to become a general debate on the chapter's philosophy. During the 200 years of the conclave, no [[Iron Father]] is elected to lead the [[Iron Council]]. |[[Clan Raukaan - A Codex: Space Marines Supplement (6th Edition)]]{{CMEFn|7x}}
|-
|261.M41
|The first [[Falchion Escort|''Falchion''-class frigate]] is laid down at the [[forge world]] [[Voss]].{{Fn|[[Rogue Trader: Battlefleet Koronus]], pg. 2612a}}
|-
|273.M41
|[[Hydra Flak Tank]] found.|[[Imperial Armour Volume One - Imperial Guard and Imperial Navy]]{{CMEFn|15x}}
|-
|298.M41
|[[Rogue trader]] [[Salgut Falkin]] ferries thirty thousand surplus hive workers from [[Clove]] in the [[Calixis Sector]] to an uninhabited world. He remains long enough to see their prefabricated habs deployed.{{Fn|[[Rogue Trader Core Rulebook]], pg. 3269c}}
|}
!Year
!Event
|-
|310.M41
|[[Rogue trader]] [[Salgut Falkin]] returns to the colony world he founded after a series of unfortunate encounters with the [[eldar]]. He finds a thriving community calling itself New Clove and installs himself as Imperial commander. An eldar fleet follows him and ejects the colonists from their [[Maiden World]]. Falkin and the remainder of his flotilla disappear into the [[Koronus Expanse]].{{Fn|[[Rogue Trader Core Rulebook]], pg. 3269c}}
|-
|322.M41
|The [[Golden Halos]] [[Chapter|Space Marine Chapter]] encounters the infamous "ghost ship" ''[[Celestion]]'' while aboard the [[Battlecruiser]] ''[[Garandus]]''. The result is a severe glancing collision upon the lower port bow, ripping apart several of the chapter's dropships. A surprise [[warp vortex]] halts all recovery operations. Casualties were listed as 2,362, 17% from the Golden Halos.|[[Inferno! 11]]{{CMEFn|16}}
|-
|342.M41
|[[Inquisitor]] [[Eisenhorn]] declares Inquisitor [[Quixos]] a [[heretic]] and [[Extremis Diabolus]]. Eisenhorn leads a cell that hunts down and kills Quixos three years later (Quixos approx. 300 years old at this point).|[[Malleus (Novel)]]{{CMEFn|6x}}
|-
|359.M41
|[[Copul IV]] cleansed by the [[Ultramarines]].|{{CME}}
|-
|367.M41
|A joint Space Marine and [[Imperial Guard]] force led by [[Marneus Calgar]] scours the [[Ork]] world of [[Balur]].|{{CME}}
|-
|rowspan=2|371.M41
|[[Space Marine Sergeant|Sergeant]] [[Severus (Dreadnought)|Severus]] of the [[Ultramarines]] is wounded on [[Corinth]] and interred in a [[Dreadnought]]. He returns for the seven-year [[Corinthian Crusade]] in 698.M41.|{{CME}}
|-
|[[Acata Uprising]]{{Fn|[[Imperial Armour Volume Two - Second Edition]], pg. 208b}}
|-
|373.M41
|[[Inquisitor]]s murdered. [[Jaq Draco]] raids the [[Black Library of Chaos]]. Planet [[Sabulorb]] incinerated. [[Jaq Draco]] killed in the [[Eldar]] [[Webway]].|[[Harlequin (Novel)]]{{CMEFn|17}}; [[Chaos Child (Novel)]]{{CMEFn|18}}
|-
|383.M41
|[[Warp storm]] [[Iagon (Warp Storm)|Iagon]] affects [[Lissandro]]. The governing body, the Quorum Immaculate, has the population implanted with [[electoo]]s bearing hexagrammatic wards against daemonic possession. The arrival of the [[Black Ships]] triggers the false wards and the population is transformed into [[Horror of Tzeentch|Pink Horrors]]. By the time the [[Grey Knights]] arrive, the entire population is either dead or converted. The Grey Knights witness the disappearance of the [[Blue Scribes]] and discover that the symbol was one of invitation, not banishment.{{Fn|[[Codex: Chaos Daemons (6th Edition)]], pg. 2214b}}
|-
|385.M41
|Following the deaths of the Seventeen Holy Martyrs, [[Lord Inquisitor]] [[Heydrich Tarlemon]] orders the [[Calixis Sector]] [[Ordo Malleus]] to collate all their records of [[daemon]]ic names and activities.{{Fn|[[Dark Heresy: Daemon Hunter]], pg. 7419b}}
|-
|388.M41
|'''Assassination of Fenton Kail''': [[Fenton Kail]] is assassinated days after declaring his discovery of an intact [[Standard Template Construct]].{{Fn|[[Rogue Trader Core Rulebook]], pg. 3629i}}
|-
|rowspan=2|392.M41
|[[Battle of Karsk System]] ([[Macharian Crusade]]) - The [[Macharian Crusade]] begins, led by [[Lord Commander Solar Macharius]].{{Fn|[[White Dwarf 240 (UK)]], pgs. 32-3320}}
|-
|'''Rediscovery of Persepolis''' ([[Macharian Crusade]]) - The [[Hive World]] of [[Persepolis]] is re-contacted by the Imperium after 5,000 years.{{Fn|[[White Dwarf 240 (UK)]] pgs. 32-3320}}
|-
|393.M41
|'''Battle of Zaga IV''' ([[Macharian Crusade]]){{Fn|[[White Dwarf 240 (UK)]], pgs. 32-3320}}
|-
|rowspan=2|395.M41
|'''Battle of Thoth''' ([[Macharian Crusade]]){{Fn|[[White Dwarf 240 (UK)]], pgs. 32-3320}}
|-
|'''Invasion of Adrantis Five''' ([[Macharian Crusade]]){{Fn|[[White Dwarf 240 (UK)]], pgs. 32-3320}}
|-
|399.M41
|After seven years of Crusade, nearly one thousand worlds brought into the [[Imperium]] in the [[Segmentum Pacificus]]. A seven year [[Crusade]] ending with [[Lord Commander Solar Macharius]]' death and causing the [[Macharian Heresy]].{{Fn|[[White Dwarf 240 (UK)]], pgs. 32-33; [[Codex: Dark Angels (6th Edition)]], pgs. 36-3820}}{{Fn|21b}}
|}
!Year
!Event
|-
|400.M41
|'''Death of Lord Commander Solar Macharius''' {{Fn|[[White Dwarf 240 (UK)]], pgs. 32-33; [[Codex: Dark Angels (6th Edition)]], pgs. 36-3820}}{{Fn|21b}}
|-
|401-404.M41
|Inquisitor [[Gideon Ravenor]] and his team investigate the illegal trade in [[flect]]s, a warp-tainted drug on [[Eustis Majoris]]{{Fn|[[Ravenor: The Omnibus]] pg. 306-307, pg. 57021a}}{{CMEFn|21b}}
|-
|405.M41
|The [[Dark Angels]] suppress civil wars during the [[Macharian Heresy]]. The [[Ravenwing]] uncovers cults and signs of [[Cypher]]'s presence. An encounter with the [[Space Wolves]] allows several [[Fallen Angel]]s to escape during the [[Lythanos Uprisings]].{{Fn|[[Codex: Dark Angels (6th Edition)]], pg. 2521a}}
|-
|410-412.M41
|The [[First Siege of Vaxanide|First Siege]] of [[Vaxanide]] by Ork raiders was repulsed by elements of [[Battlefleet Calixis]] under [[Commodore]] [[Brokk]].{{Fn|[[Rogue Trader: Battlefleet Koronus]], pg. 5612b}}
|-
|422-424.M41|[[Siege of Port Wander]] (422-424.M41) - [[Waaagh! Gulgrog]] lays siege to [[Port Wander]]. Two-thirds of [[Battlefleet Calixis]] responds to the attack, led by [[Admiral]] [[Androvast Strophes]]. ''[[Fist of Adamant]]'' cripples the ork flagship and routs the invasion. The [[Imperial Navy]] reclaims Port Wander instead of pursuing the [[ork]]s into the Maw. The orks of the [[Koronus Expanse]] remain a minor threat for the next four centuries.{{Fn|[[Rogue Trader: Edge of the Abyss]], pg. 5123}}
|-
|443.M41
|The [[Inquisition]] has Lord-Captain [[Balastus Irem]] and his family wiped out for dealing in xenotech excavated from the Cineris Malificum, including [[Halo Device]]s.{{Fn|9a}}{{Fn|[[Rogue Trader Core Rulebook]], pgs. 281 & 361-3629h}}{{Fn|9i}}
|-
|444.M41
|[[First War for Armageddon]]: Chaos incursion led by [[Angron]] and [[World Eaters]] beaten back by [[Space Wolves]] and [[Grey Knights]].{{Fn|[[Codex: Chaos Space Marines (3rd Edition, 2nd Codex)]], pg. 8; [[Codex: Chaos Space Marines (6th Edition)]], pg. 24}}{{Fn|25a}}
|-
|447.M41
|[[Godjera Incursion]]{{Fn|[[Imperial Armour Volume Two (Second Edition)]], pg. 208b}}
|-
|450-465.M41
|Inquisitor [[Hesten]] compiles the [[Hesten manuscript]], which documents principles of the God Incarnate ([[Thorian]] doctrine).|{{CME}}
|-
|452.M41
|[[Invasion of Yerena System]]: The [[Order of the Bleeding Heart]], entrusted with the bones of [[Saint Emiline]], evacuates the [[Shrine World]] of [[Emiline's Hope]] when an [[Ork]] [[Waaagh!]] under the command of the [[Arch Maniac of Calvera]] invades the [[Yerena System]].|{{CME}}
|-
|474.M41
|[[Armageddon]] riots. [[Warp storm]]s cut off Armageddon. Food shortages lead to armed rebellion in a dozen hives.|{{CME}}
|-
|498.M41
|[[Parsimus Dewain]], last of the Dewain [[rogue trader]]s, dies without an heir.{{Fn|[[Rogue Trader Core Rulebook]], pg. 3629i}}
|}
!Year
!Event
|-
|rowspan=2|500.M41
|Across the [[Imperium]] there are visions of the [[Emperor]]'s tears. From the poorest urchin to the mightiest [[Chapter Master]], all who see the visions know that the Emperor weeps not for himself, but for all mankind.{{Fn|[[Warhammer 40,000 6th Edition Rulebook]], pg. 17126a}}
|-
|Liege [[Tarn Marvolus]] of [[Footfall]] is quartered after attempting to extort tribute from [[rogue trader]] [[Cassilus]].{{Fn|[[Rogue Trader: Hostile Acquisitions]], pgs. 18-1927}}
|-
|507.M41
|The [[Second Siege of Vaxanide|Second Siege]] of [[Vaxanide]] by Ork [[Space Hulk]] ''[[Pinnacle of Savagery]]'' was defeated by a task force of [[Imperial Navy]], [[Explorator]]s and [[Rogue Trader]]s under command of [[Lord-Admiral]] [[Vargaz]]{{Fn|[[Rogue Trader: Battlefleet Koronus]], pg. 5612b}}
|-
|508.M41
|[[Imbach Genocide]]: It is known that [[Space Marine Company|2nd Company]] of the [[Skull Bearers]] [[Space Marine]] [[Chapter]] took part in it. Later all of the records about this Genocide were expunged by the [[Inquisition]]{{Fn|[[Imperial Armour Volume Two - Space Marines and Forces of the Inquisition]], pg. 64; [[Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes]], pg. 208b}}{{Fn|28}}
|-
|528.M41
|A sub-fleet of the [[Disciples of Thule]] under Magos [[Solus Kanceme]] enters the [[Koronus Expanse]] and scatters in search of pre-Imperial artefacts.{{Fn|[[Rogue Trader Core Rulebook]], pg. 3599g}}
|-
|538.M41
|The Prefect Majoris of the mining world [[Dlathus]] in the [[Hazeroth Abyss]] mistakes [[rogue trader]] Lady [[Sun Lee]] for a representative of the [[Adeptus Terra]] and releases his world's Imperial tithe to her. He disappears before the official tithe collectors arrive the next year.{{Fn|[[Rogue Trader Core Rulebook]], pg. 3289d}}
|}
|-
|609.M41
|The Bloodwrath Incident: A transport ship carrying the [[92nd Brontian Longknives]] [[Imperial Guard Regiment]], three years overdue after leaving [[Dwinlicht]], translates into realspace near [[Port Wander]]. Initial investigation brings the boarding party into contact with [[daemon]]s of [[Khorne]]. Inquisitors of the [[Ordo Malleus]] board the ship to fight the incursion and find its source. The Inquisitors fight a [[Bloodthirster]] in the central cargo bay, but the ship is destroyed when it passes within one million kilometres of Port Wander.{{Fn|19a}}|[[Dark Heresy: Daemon Hunter]], pgs. 18-19
|-
|622.M41
|[[Inquisitor]] [[Estroz]] purges [[House Thrungg]] after members of the noble house summon the [[Slaanesh]]i [[daemon]] [[Merthen|Merthen the Skindancer]]. Only three members of Thrungg survive, being off-world at the time. [[Sebellus Hive]]'s manufacturing capability is crippled for months despite the timely intervention of the Inquisitor's [[Acolyte]]s.{{Fn|19c}}|[[Dark Heresy: Daemon Hunter]], pg. 90
|-
|633.M41
|-
|650.M41
|[[Goru Heresy]]{{Fn|8b}}|[[Imperial Armour Volume Two (Second Edition)]], pg. 20
|-
|651.M41
|[[Imperial Armour Volume Twelve - The Fall of Orpheus]], pg. 24
|-
|[[Rogue Trader]] [[Orolshan]] discovers the derelict ''[[Eternal Praetorian]]'' in orbit of the [[Witch-Cursed World]].{{Fn|11}}|[[Rogue Trader: Into the Storm]], pg. 165
|-
|691.M41
|The [[Battle of Jade Reach]]: Three [[rogue trader]] flotillas answer the call for help from the [[Imperial Navy]] vessel ''[[Wrote for Luck]]'' to fight an [[ork]] fleet.{{Fn|9b}}|[[Rogue Trader Core Rulebook]], pg. 322
|-
|692.M41
|-
|703.M41
|[[Erasmus Haarlock]] vanishes after wiping out his entire family.{{Fn|9i}}|[[Rogue Trader Core Rulebook]], pg. 362
|-
|704.M41
|The Siege of [[Tulwa]]: [[Marneus Calgar]] leads infiltration force that destroy the [[Fortress of Pain]] ([[Iron Warriors]]).|{{CME}}|
|-
|710.M41
|-
|712.M41
|[[Magdelon Incursion]]{{Fn|8b}}|[[Imperial Armour Volume Two - Second Edition]], pg. 20
|-
|rowspan=2|718.M41
|[[Roodmar Urussalin]], last of his [[rogue trader]] line, is presumed slain by [[ork]]s.{{Fn|9i}}|[[Rogue Trader Core Rulebook]], pg. 362
|-
|The [[Inquisition]] discovers that the Sinners' Plagues in the [[Drusus Marches]] are the work of [[heretek]] [[Magos Biologis]] [[Sar Resque]].
|-
|721.M41
|[[Corsair Prince]] [[Nhilus|Nhilus the Ardent]] and his raiding [[Eldar Corsairs]] army are defeated by the [[Angels Sanguine]] [[Chapter]] {{Fn|8b}}|[[Imperial Armour Volume Two (Second Edition)]], pg. 20
|-
|722.M41
|-
|737.M41
|[[Valos]] reported stripped of life, later revealed to be the work of [[Hive Fleet Behemoth]].|{{CME}}|
|-
|738.M41
|-
|740.M41
|The [[Exorcists]] Chapter save the planet of [[Stonekraal]] from a large [[Genestealer]] infestation.{{Fn|13e}}|[[Imperial Armour Volume Ten - The Badab War - Part Two]], pgs. 126–127
|-
|740-743.M41
|[[Codex: Eldar (6th Edition)]], pg. 22
|-
|Thulean datavaults recovered from Dolorium's voids at this time describe star systems beyond the [[Koronus Expanse]].{{Fn|9e}}|[[Rogue Trader Core Rulebook]], pg. 337
|-
|742.M41
|-
|rowspan=3|744.M41
|[[Taggarath]], Seer of [[Corrinto]], foresees the approach of the [[Time of Ending|End Times]], and prophesies a time of unprecedented upheaval, in which even the light of the [[Emperor]] is swallowed in darkness. Taggarath is immediately executed for heresy, but his prophecy still spreads in whispers.{{Fn|14b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 126; [[Codex: Chaos Daemons (6th Edition)]], pg. 22
|-
|A string of murders and thefts at the Kellerman Scholam on [[Amarah]] are linked to a Cult Celestarii plot regarding xenos artefacts. A gun battle between cultists and [[Adeptus Arbites]] leaves the Scholam a smoking ruin. Witnesses report seeing a fire-shrouded figure retrieve several artefacts from the burning complex, untouched by the fire. Forensic examinations do not establish which of the Scholam's collection of xenos artefacts were stolen before the fire destroyed the rest.
|-
|rowspan=2|746.M41
|The [[Sons of Guilliman]] purge [[Nova Terra]] of [[genestealer]]s, executing the entire ruling class in the process. Sergeant [[Constantinus]] declares he will lead the sector into a better age, seceding it from the Imperium. The bloody unrest attracts the attention of the Ruinous Powers. The [[Officio Assassinorum]] has Constantinus killed to end the rebellion.{{Fn|25a}}|[[Codex: Chaos Space Marines (6th Edition)]], pg. 24
|-
|[[Rogue trader]] Wrath Umboldt discovers the Processional of the Damned and glimpses the Alenic Depths.{{Fn|9i}}|[[Rogue Trader Core Rulebook]], pg. 362
|-
|748.M41
|The [[Blood Star Campaign]].{{Fn|26b}}|[[Warhammer 40,000 6th Edition Rulebook]], pg. 172
|-
|749.M41
|[[Codex: Space Marines (5th Edition)]], pg. 49
|-
|The [[Great Exodus]]. After mysterious activity in the [[Argos System]] involving six [[Eldar]] [[Craftworld]]s, every primary star within sixty light years is extinguished. Nearly 12% of the Imperial population and 32% of the heavy industry is successfully evacuated. The ring of dead planets becomes a salvager's paradise and is now known as the [[Deadhenge]].{{Fn|26b}}|[[Warhammer 40,000 6th Edition Rulebook]], pg. 172
|-
|752-754.M41
|-
|754.M41
|The Harvest of Reavers: [[Aspyce Chorda]] has the surviving pirates of Iniquity lobotomized and used as slave-serfs.{{Fn|9h}}|[[Rogue Trader Core Rulebook]], pg. 361
|-
|754-756.M41
|The [[Salamanders]] Chapter purge the [[Moons of Ymgarl]] of [[Genestealers]]. [[Space Marine Captain|Captain]] [[Sokhar Bray'arth]] of the 4th Company is interred in the [[Iron Dragon]] [[Dreadnought]] chassis after suffering mortal wounds.{{Fn|13a}}{{Fn|13f}}|[[Imperial Armour Volume Ten - The Badab War - Part Two]], pgs. 78 & 172;<br>[[Codex: Space Marines (5th Edition)]], pg. 49
|-
|755.M41
|-
|757.M41
|First recorded incidence of the [[Zombie Plague]]. Twenty-three billion healthy Imperial citizens of [[Hydra Minoris]] are quarantined.{{Fn|25a}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 126; [[Codex: Chaos Space Marines (6th Edition)]], pg. 24
|-
|759.M41
|[[Scouring of Quintarn]]: [[Marneus Calgar]] commands forces against [[Ork]] scavengers who captured the triple system of [[Quintarn]], [[Tarentus]] and [[Masali]] (part of the [[Ultramar]] Coalition) in the aftermath of the Battle for Macragge.|{{CME}}|
|-
|rowspan=2|760.M41
|The [[Minotaurs]] Chapter breaks the [[Siege of Casaubon]].{{Fn|13c}}|[[Imperial Armour Volume Ten - The Badab War - Part Two]], pg. 109
|-
|Commander [[O'Shovah|Farsight]] recaptures much of the territory the [[Tau Empire]] lost in the [[Damocles Gulf Crusade]] but refuses the recall order. He establishes the fortified [[Farsight Enclaves]].
|[[Codex: Imperial Guard (5th Edition)]], pg. 22
|-
|Purging of [[Gladrinus VI]]{{Fn|8b}}|[[Imperial Armour Volume Two (Second Edition)]], pg. 20
|-
|rowspan=2|765.M41
|-
|rowspan=3|773.M41
|[[Brazen Skulls]] are listed as extinct.|{{CME}}|
|-
|The [[Tanith First and Only]] aid the reincarnated [[Saint Sabbat]] on [[Herodor]].
|-
|rowspan=2|780.M41
|[[Lycanthos Drift Campaign]], [[Fourth Quadrant rebellion]].{{Fn|21a}}|[[Imperial Armour Volume Nine - The Badab War - Part One]], pgs. 57 & 59; [[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|[[Blood Pact]] infiltrators attempt assassination of [[Mabbon]] Etogaur on [[Balhaut]].
|-
|784.M41
|[[Synod]] of [[Segmentum Obscurus]] declares the [[Margin Crusade]].{{Fn|12b}}|[[Rogue Trader: Battlefleet Koronus]], pg. 56
|-
|785.M41
|[[Aspyce Chorda]] goes to war with [[Calligos Winterscale]] over resources.{{Fn|9h}}|[[Rogue Trader Core Rulebook]], pg. 361
|-
|786.M41
|-
|794.M41
|The Faceless Lord [[Karrad Vall]] braves the Maw to shell [[Footfall]] and battle [[Calligos Winterscale]]. His fleet tears through the defences and he leaves taunting messages before he disappears for a decade.{{Fn|9f}}|[[Rogue Trader Core Rulebook]], pg. 356
|-
|795.M41
|[[Codex: Tyranids (5th Edition)]], pgs. 16–17
|-
|[[Judgement of Hellenus]]{{Fn|8c}}|[[Imperial Armour Volume Two - Second Edition]], pg. 21
|-
|803.M41
|The [[Ordo Xenos]] burns Amphian Deed for his role in the Halo of Darkness cult, ending the Deed lineage of [[rogue trader]]s.{{Fn|9i}}|[[Rogue Trader Core Rulebook]], pg. 362
|-
|804.M41
|[[Imperial Armour Volume Twelve - The Fall of Orpheus]], pg. 24
|-
|The merchant brig ''[[Daughter of Regals]]'' is lost with all hands. The [[Rak'Gol]] are believed to be responsible.{{Fn|9g}}|[[Rogue Trader Core Rulebook]], pg. 359
|-
|rowspan=2|812.M41
|-
|812-813.M41
|The [[Luxor Uprising]]: The [[Novamarines]], [[Ultramarines]] and [[Cadian 98th Armoured Regiment]] crushed an [[Alpha Legion]]-sponsored insurrection on [[Luxor (Helioret Sector)|Luxor]].{{Fn|8c}}{{Fn|15b}}|[[Imperial Armour Volume Nine - The Badab War - Part One]], pg. 119;<br>[[Imperial Armour Volume Two - Second Edition]], pg. 21;<br>[[Imperial Armour Volume One - Imperial Guard and Imperial Navy]], pg. 84
|-
|rowspan=2|813.M41
|[[Codex: Tau Empire (6th Edition)]], pg. 29
|-
|[[Inquisitor]] [[Vilane]] orders the eradication of [[Kulth (Planet)|Kulth]]'s [[Planetary Defence Forces|planetary defence force]] in response to their increasingly-violent displays of martial prowess. The ensuring [[19 Hours War]] sees the near-total destruction of Kulth's southern continent.{{Fn|19d}}|[[Dark Heresy: Daemon Hunter]], pg. 94
|-
|166.813.M31{{CME}}
|-
|rowspan=2|820.M41
|The [[Flesh Tearers]] seal a [[Warp rift]] in the [[Adeonis Sector]] against an onslaught of [[Tzeentch]]'s [[daemons]]. The [[Changeling]] tugs the strings of fate to move them toward damnation.{{Fn|14b}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 22
|-
|[[Siege of Vraks]]: reports of [[Adeptus Astartes]] in the renegade forces comes to the attention of Lord Commander [[Zuehlke]]. [[Arkos]]'s warband has joined the fight for Vraks.
|-
|832.M41
|The [[Deathwing]] deploys en masse to kill or capture every inhabitant of Minoria's moon in the Periliac System, ignoring requests for their presence to fight [[Waaagh!]] Drillakilla on Periliac Prime.{{Fn|21a}}|[[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|833.M41
|-
|844.M41
|[[Chinchare Hrud Infestation]]{{Fn|8c}}|[[Imperial Armour Volume Two - Second Edition]], pg. 21
|-
|rowspan=2|845.M41
|[[Codex: Space Wolves (5th Edition)]], pg. 19
|-
|The [[Second Krandor Rebellion]].{{Fn|26c}}||[[Warhammer 40,000 6th Edition Rulebook]], pg. 173
|-
|855.M41
|-
|876.M41
|The [[Bloodtide]] returns under the command of the [[Bloodthirster]] [[Ka'jagga'nath]]. It rampages across the planet [[Van Horne]] until Ka'jagga'nath is banished by the 4th Brotherhood of the [[Grey Knights]].{{Fn|14b}}{{Fn|26c}}|[[Warhammer 40,000 6th Edition Rulebook]], pg. 173; [[Codex: Chaos Daemons (6th Edition)]], pg. 22
|-
|877.M41
|An enormous [[Void whale]] emerges from the [[Warp]], mutated by exposure to the Empyrean. The [[Space Wolves]] of [[Engir Krakendoom]]'s Great Company board the entity before it can destroy the stronghold of [[Perillia]], combating the entire hostile ecosystem in the whale's innards, before planting demolition charges on its vital organs and escaping seconds before the explosion. The [[Perillian Gas Belt]] is born from the whale's remains. The gas belt overtakes [[Rillith]] and [[Deith]], bringing [[Perillian Catastrophes|catastrophes]]. The [[Inquisition]] resorts to sorcery to disperse the gas belt.{{Fn|14b}}|[[Codex: Space Wolves (5th Edition)]], pg. 19; [[Codex: Chaos Daemons (6th Edition)]], pg. 22
|-
|878.M41
|[[Codex: Imperial Guard (5th Edition)]], pg. 22
|-
|[[Dark Eldar]] warriors of the [[Kabal of the Black Heart]] raid Imperial Munitions Relay Base 359, causing the western Imperial flank to collapse during the Irgax Offensive and threatening the stability of the Imperial presence on Kyobin and the entire subsector.{{Fn|26g}}|[[Warhammer 40,000 6th Edition Rulebook]], pg. 344
|-
|886.M41
|-
|894.M41
|[[Betalis Campaign]] on [[Betalis III]]{{Fn|8c}}|[[Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes]], pg. 21
|-
|rowspan=2|895.M41
|[[Codex: Necrons (3rd Edition)]], pg. 11 - ''Darkness Rising''; [[Warhammer 40,000 5th Edition Rulebook]], pg. 127
|-
|[[Faze V]] is re-discovered by a [[Rogue Trader]] who has the support of the [[Dark Angels]] Fifth Company. The local human population is mind-linked with a huge artificial intelligence and the Dark Angels destroy it. Millions of locals rise up against the Imperium and the Dark Angels crush the rebellion and burn the planet to the ground. [[Bekenel]], [[Dark Angels Grand Master|Grand Master]] of the [[Deathwing]], retrieves some data from the machine complex.{{Fn|21a}}|[[Codex: Dark Angels (3rd Edition)]], pg. 20; [[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|[[Hive Fleet]] [[Colossus]] descends upon the Imperial world of [[Thressiax]]. Ignoring the orders of Imperial Command, [[Wolf Lord]] [[Bran Redmaw]] details two squads of [[Grey Hunters]] to protect the planet's spaceport from the [[Tyranids]] long enough for the civilian population to evacuate.
|[[Codex: Space Wolves (5th Edition)]], pg. 19
|-
|[[Battle of Centius Prime]]{{Fn|8c}}|[[Imperial Armour Volume Two - Second Edition]], pg. 21
|-
|897-903.M41
|-
|899.M41
|The [[Battle of Carrion Deep]]. One of the first confirmed and detailed conflicts between the Imperium and the rising Necron threat.{{Fn|13b}}|[[Imperial Armour Volume Ten - The Badab War - Part Two]], pgs. 88–89
|-
|}
|-
|901-912.M41
|[[Lugft Huron]], [[Chapter Master]] of the [[Astral Claws]], revolts. An Imperial investigation fleet is destroyed in orbit of [[Badab]], killing 23,000 agents of the Imperium. Huron declares himself Tyrant of Badab and secedes from the Imperium. The [[Badab War]] follows.{{Fn|25a}}|[[Codex: Chaos Space Marines (4th Edition)]], pg. 57; [[Codex: Chaos Space Marines (6th Edition)]], pg. 24; [[Warhammer 40,000 5th Edition Rulebook]], pg. 127
|-
|902.M41
|[[Codex: Chaos Space Marines (4th Edition)]], pg. 57
|-
|A [[Chaos]] incursion on [[Paraghast]] turns Patrihive into a nightmarish twisted prison. Billions of souls fight [[daemon]]s of [[Nurgle]] and [[Slaanesh]] as their home hive turns against them.{{Fn|14b}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 22
|-
|rowspan=2|905.M41
|-
|rowspan=2|906.M41
|[[Badab War]]: the [[Red Scorpions]] and [[Minotaurs]] are called in to suppress the revolt. |{{CME}}|
|-
|[[Badab War]]: [[The Betrayal at Grief]] - Lord High Commander [[Verant Ortys]] of the [[Red Scorpions]] is killed under an attack by unknown forces during a meet between the Loyalist and Secessionist forces. The Chapter Master of the [[Mantis Warriors]] [[Sartaq]] is also killed. [[Lugft Huron]] is later blamed for this incident.
|[[Warhammer 40,000 5th Edition Rulebook]], pg. 127
|-
|[[Molov Massacre]]. All details purged by [[Inquisition]]{{Fn|8c}}|[[Imperial Armour Volume Two - Second Edition]], pg. 21
|-
|915.M41
|Starting of '''The Red Hunt''' - The [[Red Hunters]] [[Chapter]] were ordered to shadow the [[Mantis Warriors]], [[Lamenters]] and [[Executioners]] in their penitent crusades after the Badab War.{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes]], pg. 22
|-
|rowspan=2|917.M41
|[[Battle of Amion]]. [[Red Talons]] and [[Armageddon Steel Legion]] vs. rebel Imperial forces.|{{CME}}|
|-
|[[Azrael]] is named Grand Master of the [[Deathwing]].{{Fn|21c}}|[[Codex: Dark Angels (6th Edition)]], pg. 52
|-
|rowspan=2|919.M41
|[[Fight or Flight (Short Story)]]
|-
|The [[Eagle Warriors]] tried to repel [[Feral Ork]]s from the central lowlands of the primal continent on [[Balur Secundus]] but receive a grievous defeat when the Orks ambushed them and kill all except [[Veteran Sergeant]] [[Nzahan]] who managed to survive.{{Fn|8d}}|[[Imperial Armour Volume Two (Second Edition)]], pg. 22
|-
|rowspan=2|920.M41
|[[Warhammer 40,000 5th Edition Rulebook]], pg. 127
|-
|The [[Tau Empire]] claims Ur-Clemait until the [[Word Bearers]] return to claim their Blood Tithe.{{Fn|25c}}|[[Codex: Chaos Space Marines (6th Edition)]], pg. 26
|-
|921.M41
|-
|922.M41
|The first four companies of the [[Dark Angels]] put down a rebellion on [[Sephlagm]].{{Fn|21a}}|[[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|rowspan=2|925.M41
|-
|rowspan=3|926.M41
|The [[Vaxhallian Genocides]]: [[The Purge]] slaughter over fourteen billion Imperial citizens in a single month.{{Fn|25b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 128; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25
|-
|The [[Dulma'lin Cleansing]]: The [[Catachan II]], led by [[Colonel]] [[Straken|"Iron Hand" Straken]], the only [[regiment]] to survive planetfall on [[Dulma'lin]], fights a year-long guerrilla war against the [[Ork]] invaders, destroying the Orks' main settlement two days ahead of the arriving Imperial reinforcement.
|[[Codex: Imperial Guard (5th Edition)]], pg. 23
|-
|[[Verdan Wars]]{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes]], pg. 22
|-
|rowspan=2|931.M41
|-
|rowspan=4|937.M41
|[[Inquisitor]] [[Pranix]] leads a strikeforce of [[Space Wolves]], [[Cadian Shock Troopers|Cadian]] and [[Tallarn Desert Raiders|Tallarn]] [[Imperial Guard]] in an attempt to wrest the [[Hollow Worlds]] from the control of the [[Red Corsairs]]. [[Huron Blackheart]] has preselected sections of tunnel collapsed, isolating and destroying portions of the Imperial army. The Imperial army is forced to withdraw.{{Fn|25b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 128; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25
|-
|The [[Imperial Navy]] finally catches up with the [[Ravagers (Warband)|Ravagers]] over the [[Tau]] colony of [[Salomine]], resulting in the destruction of most of the warband. [[Salomine]] then possibly falls to the Imperium.
|[[Codex: Imperial Guard (5th Edition)]], pg. 23
|-
|A [[Chaos Space Marine]] ambush kills [[Dark Angels]] [[Supreme Grand Master]] [[Naberius]]. [[Azrael]] leads the [[Deathwing]] to recover his body and is named his successor.{{Fn|21a}}|[[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|[[Chaplain]] [[Cassius]] onboard the [[Ultramarines]] [[Strike Cruiser]] [[Vengeance of Macragge]] lead the [[Battle Barges]] from Howling Griffons and [[Aurora Chapter]] to track a tendril of [[Hive Fleet]] [[Leviathan]]. As the tendril passes an asteroid belt near the [[Jomm]] System, they destroy the moon of [[Vendorak]]. The resulting shockwave causes asteroids to crash into the planet depleteing the hive fleet to, so it can't reach the planets of Jomm.{{Fn|5}}
|-
|946.M41
|[[Dante (station)|Dante]], [[Yarrick (station)|Yarrick]] and [[Mannheim (station)|Mannheim]] monitoring stations are established in the outermost orbit of the [[Armageddon]] system.|{{CME}}|
|-
|rowspan=2|949.M41
|[[Codex: Space Marines (5th Edition)]], pg. 49
|-
|[[Dark Angels]] [[Librarian]] [[Ezekiel]] kills [[Ork]] Warlord [[Groblinik]] in the [[Battle of the Sularian Gate]], ending his [[Waaagh!]]{{Fn|21a}}|[[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|rowspan=2|951.M41
|
|-
|[[Doom Warriors]] managed to destroy the [[Psyker]]-cult on the planet [[Truan IX]]{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|952.M41
|-
|rowspan=6|955.M41
|A [[daemon]] invasion of the agri-world [[Gheistos]] ends with [[exterminatus]].{{Fn|14b}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 22
|-
|[[Daemons]] overrun [[Talus IV]], the [[homeworld]] of the [[Brazen Claws]] [[Space Marine Chapter]].
|[[Codex: Imperial Guard (5th Edition)]], pg. 24
|-
|Task force of [[Red Hunters]] and [[Inquisition]] were lost near moons of [[Lomea]] following the penitent crusade of the [[Mantis Warriors]] during '''The Red Hunt'''{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|[[Soulmaw]] assault the [[Silver Skulls]] homeworld, but are unsuccessful.
|-
|rowspan=2|959.M41
|[[Purging of Ganymede]] - all information deleted by [[Inquisition]]{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|The [[Hellfire Stone]] appears on the [[death world]] of [[Pythos]] before promptly disappearing as it does roughly every 40 years.
|[[Codex: Space Marines (5th Edition)]], pg. 49
|-
|The [[Subjugators]] [[Chapter]] and the [[Deathwatch]] destroyed the unnamed [[xenos]] race in the [[Tyrama Secundus Campaign]] {{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|965.M41
|-
|rowspan=2|972.M41
|Imperial agri-world [[Chigon 17]] is overrun by [[Ork]]s under [[Ghazghkull Thraka]] using guerrilla tactics.|{{CME}}|
|-
|[[Cleansing of Opridia]]{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|973.M41
|Thousands of [[daemon]]ic incursions cause huge amounts of damage and sow many seeds of future corruption.{{Fn|26d}}||[[Warhammer 40,000 6th Edition Rulebook]], pg. 175
|-
|974.M41
|[[Codex: Imperial Guard (5th Edition)]], pg. 24
|-
|[[Eldar]] [[craftworld]] [[Lugganath]] falls to the Brittle Coma. Its seers project themselves into the Garden of [[Nurgle]] in search of [[Isha]] and are lost.{{Fn|14a}}{{Fn|14b}}|[[Codex: Chaos Daemons (6th Edition)]], pgs. 15 & 22
|-
|The [[Great War of Confederation]]. The [[Tau]] battle for survival against a major [[Ork]] incursion. [[Commander Shadowsun]] leads the Tau to victory.|{{CME}}|
|-
|Commander [[O'Shaserra|Shadowsun]] earns her name when [[Vior'la]] [[sept]] leads the defence against the largest [[Ork]] [[Waaagh!]] to attack the [[Tau Empire]].
|-
|977.M41
|[[Orask Wars]] {{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|rowspan=2|978.M41
|-
|982.M41
|Last encounter with [[Hive Fleet]] [[Perseus]], which drifts outsystem.|{{CME}}|
|-
|rowspan=2|983.M41
|The [[Fire Hawks]] are declared lost in the warp.|{{CME}}|
|-
|[[Ragnar Blackmane]] avenges the death of his [[Wolf Lord]], [[Berek Thunderfist]], by slaying the [[Chaos Champion]] [[Ghorox Bloodfist]] in single combat. Ragnar and his handpicked force later defeat Ghorox's allies from the [[Word Bearers]] during the [[Gravespite Massacre]]. Ragnar is acclaimed Berek's successor.
|-
|rowspan=2|984.M41
|[[Battle of Hell Town]]: [[Pyran Dragoon]]s assigned to an [[Armageddon]] jungle base desert their posts, leaving the [[Armageddon Ork Hunters]] to defend against Ork invasion.|{{CME}}|
|-
|A single [[Silver Sabres]] [[Space Marine]] survives the drop onto the feudal world of [[Vhospis]] and rallies the defenders against a [[daemon]] invasion.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|985.M41
|[[Helsreach (Novel)|Helsreach]], Chapter Five
|-
|[[Lammas Campaign]] underway, [[Valstadt 13th Armoured Regiment]] fighting.{{Fn|15b}}|[[Imperial Armour Volume One - Imperial Guard and Imperial Navy]], pg. 29
|-
|rowspan=4|989.M41
|Orks of the [[Charadon]] empire invade [[Rynn's World]]. During the initial invasion the [[Crimson Fists]] are nearly wiped out by their own defence missile. . Later [[Rynn's World]] was reclaimed by [[Pedro Kantor]] of the [[Crimson Fists]] and relief army of the [[Imperium]]{{Fn|8d}}|[[Imperial Armour Volume Two - Second Edition]], pg. 22
|-
|[[Helbrecht]] is elected as [[High Marshal (Black Templars)|High Marshal]] of the [[Black Templars]] and declares a Crusade against the [[Cythor Fiends]] of the Ghoul Stars.
|[[Codex: Black Templars (4th Edition)]], pg. 44
|-
|[[Waaagh!]] [[Snagrod]] barrels through the Loki sector, devastating [[Rynn's World]] and the [[Crimson Fists]]. The [[Dark Angels]] reinforce the [[Crimson Fists]] to purge the [[Ork]]s from the sector.{{Fn|21a}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 128; [[Codex: Space Marines (5th Edition)]], pg. 49; [[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|The [[Ultramarines]] Third Company liberates the [[Lagan]] system from the [[Tau Empire]].
|[[Codex: Space Marines (5th Edition)]], pg. 49
|-
|The [[Dark Eldar]] noble [[Zorothriel]] captures [[Karanak]] on a hunt on the Daemon world [[Khornax]]. Karanak breaks free and kills everyone onboard Zorothriel's warship.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|991.M41
|-
|991.M41-Present
|[[Orphean War]] against [[Necron]] [[Maynarkh Dynasty]]{{Fn|8e}}|[[Imperial Armour Volume Two - Second Edition]], pg. 23
|-
|rowspan=6|992.M41
|[[Battlefleet Gothic Armada]], pg. 77
|-
|After an eruption on the burial plains of [[Rhea's World]], [[plaguebearers]] assault the planet's hives.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|[[Roghrax Bloodhand]] swears to [[Khorne]] that he will take a skull from every warrior species in the galaxy. He directs his fleet to the [[Eastern Fringe]] so he can take skulls from the encroaching [[Tyranid]] forces.{{Fn|25c}}|[[Codex: Chaos Space Marines (6th Edition)]], pg. 26
|-
|Raid on [[Kastorel-Novem]]. [[Raven Guard]] and [[Elysian Drop Troops]] attacked [[Orks]] forces but were defeated.{{Fn|8e}}|[[Imperial Armour Volume Two - Second Edition]], pg. 23
|-
|rowspan=6|993.M41
|[[Warhammer 40,000 5th Edition Rulebook]], pg. 128; [[Codex: Space Marines (5th Edition)]], pg. 40
|-
|[[Iron Warriors]] [[Warsmith]] [[Vhostok Pistonhand]] takes control of [[Diesos]] and manufactures countless [[daemon engine]]s. The Ruinous Powers send massive Daemonic legions to free their servants. The war for Diesos ends within a month and then starts anew as the legions fight amongst themselves.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|The [[Tau Empire]] and [[Imperium of Man]] fight over [[Nimbosa]]. Commander [[Brightsword]] is censured for the Koloth Gorge Massacre.
|[[Codex: Tau Empire (6th Edition)]], pg. 29
|-
|Battle on [[Miral Prime]] against Tyranids. The [[Scythes of the Emperor]] suffered great losses.{{Fn|8e}}|[[Imperial Armour Volume Two - Second Edition]], pg. 23
|-
|rowspan=7|995.M41
|'''Battle of Korsk II''': [[Space Marines]] crush Lord [[Varlak]]'s rebellion in a major tank battle on the plains of [[Korsk II]].|{{CME}}|
|-
|[[Tau]] fleet action at the shrineworld [[Ghola's Hope]].
|[[Codex: Space Marines (5th Edition)]], pg. 49
|-
|A Warp-time dilation manifests over [[Thridia]], spawning [[daemon]]s from the very air. The defenders fall back toward Hive Vertes and right into awakening [[Necron Warrior]]s. The Necrons attack the daemons, allowing the Imperial Guard to reach the hive. The men are mind-wiped and the battlefields bombarded.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|Every volcano on [[Abheilung]] erupts at once, killing millions of settlers and spilling forth [[Daemon engine]]s crafted in the [[Dark Mechanicum]] forges under the surface. The planet is scoured of life in less than a month.{{Fn|25c}}|[[Codex: Chaos Space Marines (6th Edition)]], pg. 26
|-
|[[Huron Blackheart]] attacks [[Parenxes]]. During the fight, [[Red Corsairs]] strike forces manage to board and capture the [[Space Wolves]] strike cruiser ''[[Wolf of Fenris]]''.{{Fn|25c}}|[[Codex: Chaos Space Marines (6th Edition)]], pg. 26; [[Warhammer 40,000 5th Edition Rulebook]], pg. 128
|-
|The "[[Cypher|Voice of the Emperor]]" makes himself known in the Agripinaa Sector, exhorting its inhabitants to rise up against the authority of the [[Administratum]].
|[[Battlefleet Gothic Armada]], pg. 76
|-
|A distress signal lures the [[Dark Angels]] into a [[genestealer]] ambush in the hives of Durganion XIII. The [[Ravenwing]] kills the [[broodlord]] and the rest of the Dark Angels exterminate the xenos. The entire planet is marked for corruption testing.{{Fn|21a}}|[[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|rowspan=7|997.M41
|[[Codex: Tyranids (5th Edition)]], pg. 29
|-
|A hundred thousand [[daemonette]]s take up a joking invitation to a party held by the ruler of [[Ferrite Mons]]. Even the [[Vostroyan Firstborn]] regiment falls to the daemonettes.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|The [[Tau Empire]]'s [[Third Sphere of Expansion]] begins.
|[[Dataslate: Cypher - Lord of the Fallen (Background Book)]], ''Everywhere and Nowhere''
|-
|[[Defence of Valedor]]{{Fn|8e}}|[[Imperial Armour Volume Two - Second Edition]], pg. 23
|-
|138.997.M41
|-
|221.997.M41
|The Ork Warlords [[Ghazghkull Mag Uruk Thraka]] and [[Nazdreg]] launch an attack upon the power plant of [[Kadillus Harbour]], the capital-city of [[Piscina IV]]. The [[Dark Angels]], under the command of Third Company Master [[Belial]] manage to disrupt his plans until further Dark Angels reinforcements manage to arrive. The Ork horde is driven off. {{Fn|21a}}{{Fn|21d}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 129; [[Codex: Dark Angels (3rd Edition)]], pg. 19; [[Codex: Dark Angels (6th Edition)]], pgs. 25 & 57
|-
|310.997.M41
|[[Battlefleet Gothic Armada]], pg. 77
|-
|[[Historicus]] [[Coran Celecius]] is tried for heresy after his work links the [[Aphis hermitage massacre]] to the [[Necrontyr]] and other mysterious past encounters.|{{CME}}|
|-
|Inquisitor [[Lichtenstein]] is declared [[Excommunicate Traitoris]].|{{CME}}|
|-
|Hive Fleet [[Moloch]] attacks the galaxy through the Ghoul Stars.
|[[Codex: Space Wolves (5th Edition)]], pg. 21
|-
|The [[Dark Angels]] and [[Black Templars]] come to blows over the handling of [[Cypher|a prisoner]]. [[Inquisitor]] Archibald is assigned to lead an inquiry.{{Fn|21a}}|[[Codex: Dark Angels (6th Edition)]], pg. 25
|-
|The [[Cryptus System]] is [[Cryptus Campaign|invaded]] by Hive Fleet [[Leviathan]].|{{CME}}|
|-
|433.998.M41
|The [[Red Waaagh!]]|{{CME}}|
|-
|757.998.M41
|-
|871.998.M41
|[[Galdemor]] is host to a three-way war between [[daemon]]ic legions of [[Slaanesh]], [[Khorne]], and [[Nurgle]]. Not a single soul survives.{{Fn|14c}}|[[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|990.998.M41
|[[Dataslate: Cypher - Lord of the Fallen (Background Book)]], ''Everywhere and Nowhere''
|-
|[[Executioners]] [[Chapter]] arrived to the [[Orpheus Sector]] and swear an oath of revenge for the [[Imperium]] losses here.{{Fn|8e}}|[[Imperial Armour Volume Two - Second Edition]], pg. 23
|-
|010.999.M41
|-
|884.999.M41
|The [[Nephilim sector]] trembles as the 5th Company of the [[Dark Angels]] and the renegade [[Crimson Slaughter]] battle over the [[Hellfire Stone]].{{Fn|21a}}{{Fn|26e}}||[[Warhammer 40,000 6th Edition Rulebook]], pg. 176; [[Codex: Dark Angels (6th Edition)]], pg. 25; [[Dark Vengeance (Novella)]]
|-
|975.999.M41
|-
|980.999.M41
|The [[Red Corsairs]] emerge from the Maelstrom in force and lay siege to several systems, notably the Chogoris, Kaelas, and Sessec systems. The [[White Scars]] withdraw from the [[Armageddon]] theatre to meet the threat.{{Fn|25b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 129; [[Codex: Space Marines (5th Edition)]], pg. 49; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25
|-
|982.999.M41
|The [[Great Awakening]]: a ripple of psychic power flows through the Warp and activates the latent abilities of millions of psykers. Innumerable warp rifts are created and several worlds are lost to daemonic infestation. The [[Thousand Sons]] are seen in unprecedented numbers.{{Fn|14c}}{{Fn|25b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 129; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25; [[Codex: Chaos Daemons (6th Edition)]], pg. 23
|-
|3.982.999.M41
|-
|992.999.M41
|The [[Night of a Thousand Rebellions]]. Countless worlds across the Imperium fall into unrest and rebellion. Even worlds once thought secure, such as [[Enceladus]], [[Darkhold]] and [[Minisotira]], are affected. The homeworld of the [[Lions Defiant]] [[Chapter]] is lost to anarchy. Communication is lost with large swathes of [[Segmentum Pacificus]].{{Fn|25b}}{{Fn|26f}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 129; [[Warhammer 40,000 6th Edition Rulebook]], pg. 177; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25
|-
|993.999.M41
|A flood of distress signals and cries for help flood through the Imperium. Entire [[Astropath]]ic choirs are overloaded and collapse. Anarchy and panic spread as the Imperium's communication systems fail. From [[Segmentum Pacificus]] there is only eerie silence...{{Fn|26f}}||[[Warhammer 40,000 6th Edition Rulebook]], pg. 177
|-
|994.999.M41
|[[Huron Blackheart]] crushes the [[Marines Errant]]. After drawing away most of their fortress-monastery's garrison, Blackheart's [[Night Lords]] allies infiltrate and bring down its static defenses. The [[Red Corsairs]] withdraw with nearly all of the chapter's [[gene-seed]] and relics, dooming the Marines Errant to a slow demise.{{Fn|25b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 146; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25
|-
|rowspan=2|995.999.M41
|Warmaster [[Abaddon]] launches the [[13th Black Crusade]]. The armies of Chaos Undivided lay siege primarily to [[Cadia]] but attack many of the surrounding worlds as well. Imperial Forces launch a massive counterattack, and eventually push back the tides of Chaos, but only just barely, and at great cost. The [[Space Wolves]]' [[13th Great Company]] are amongst the forces seen fighting against the forces of chaos. Major side battles include the [[Diamor Campaign]]{{Fn|25b}}|[[Warhammer 40,000 5th Edition Rulebook]], pg. 129; [[Codex: Chaos Space Marines (6th Edition)]], pg. 25
|-
|In [[Commorragh]], [[Khaine's Gate]] begins to fail
|-
|rowspan=11|~999.999.M41
|The [[Prefectia Campaign]] and the [[Second Agrellan Campaign]] are waged against the [[Tau]]|{{CME}}|
|-
|The [[Ynnari]] form to reawaken the [[Eldar]] god [[Ynnead]] as a major [[Dysjunction]] rocks [[Commorragh]] from the birth of [[Yvraine]].|{{CME}}|
|-
|The [[Hunt for the Wulfen]] and the [[Siege of the Fenris System]]. The [[Space Wolves]] fall into a plot by [[Magnus the Red]] as the [[Wulfen]] return.|{{CME}}|
|-
|[[Battle of Biel-tan|The Fracture of Biel-Tan]] sees a [[Slaaneshi]] invasion of [[Biel-Tan]] defeated and the [[Yncarne]] created by the [[Ynnari]], but the [[Craftworld]] is forever broken
|[[Gathering Storm: Fracture of Biel-Tan]], Part 3
|-
|[[Fulgrim]] reappears to orchestrate [[The Cacophony of Extremis Six]]|{{CME}}|
|-
|[[Cadia]] is destroyed at the climax of the [[Thirteenth Black Crusade]]. The survivors are led by [[Eldar]] allies into the [[Webway]]|{{CME}}|
|-
|[[Roboute Guilliman]] returns to lead the Imperium at the climax of the [[Ultramar Campaign]] and takes command on [[Terra]] after the [[Terran Crusade]]|{{CME}}|
|-
|The [[Battle of Khaine's Gate]] sees [[Asdrubael Vect]] temporarily secure [[Commorragh]] from [[Daemonic]] invasion
|[[Codex: Drukhari (8th Edition)]], pg. 46
|-
|The [[Battle of Iyanden]] sees [[Iyanden]] defeat a [[Chaos]] invasion|.{{CME}}|
|-
|The [[Blood Crusade]]|{{CME}}|
|}
==Sources==
<div style="column-width:24em;column-count:2;font-size:85%">
*{{Endn|1}}: [[The Sabbat Worlds Crusade (Background Book)]]{{CME}}
*{{Endn|2}}: [[Imperial Armour Volume Nine - The Badab War - Part One]], pgs. 126–127
*{{Endn|3}}: [[Codex: Space Marines (5th Edition)]], pg. 49
*{{Endn|4}}: [[White Dwarf 349(UK)]], pg. 55*{{Endn|5}}: [[Dataslate: Tyrannic War Veterans(Background Book)]], pg. 13*6: [[Malleus (Novel)]]**{{Endn|6a}}: Chapter Two, pg. 289**{{Endn|6b}}: Chapter Twenty**{{Endn|6x}}: {{CME}}*7: [[Clan Raukaan - A Codex: Space Marines Supplement (6th Edition)]]**{{Endn|7a}}: ''Slaughter on Dawnbreak''**{{Endn|7x}}: {{CME}}*8: [[Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes]]**{{Endn|8a}}: pg. 19**{{Endn|8b}}: pg. 20**{{Endn|8c}}: pg. 21**{{Endn|8d}}: pg. 22**{{Endn|8e}}: pg. 23*9: [[Rogue Trader Core Rulebook]]**{{Endn|9a}}: pg. 281**{{Endn|9b}}: pg. 322**{{Endn|9c}}: pg. 326**{{Endn|9d}}: pg. 328**{{Endn|9e}}: pg. 337**{{Endn|9f}}: pg. 356**{{Endn|9g}}: pg. 359**{{Endn|9h}}: pg. 361**{{Endn|9i}}: pg. 362*{{Endn|10}}: [[Chapter Approved 2001]]{{CME}}*{{Endn|11}}: [[Rogue Trader: Into the Storm]], pg. 165*12: [[Rogue Trader: Battlefleet Koronus]]**{{Endn|12a}}: pg. 28**{{Endn|12b}}: pg. 56*13: [[Imperial Armour Volume Ten - The Badab War - Part Two]]**{{Endn|13a}}: pgs. 78**{{Endn|13b}}: pgs. 88–89**{{Endn|13c}}: pg. 109**{{Endn|13d}}: pgs. 118–119**{{Endn|13e}}: pgs. 126–127**{{Endn|13f}}: pgs. 172*14: [[Codex: Chaos Daemons (6th Edition)]]**{{Endn|14a}}: pg. 15**{{Endn|14b}}: pg. 22**{{Endn|14c}}: pg. 23*15: [[Imperial Armour Volume One - Imperial Guard and Imperial Navy]]**{{Endn|15a}}: pg. 29**{{Endn|15b}}: pg. 84**{{Endn|15x}}: {{CME}}*{{Endn|16}}: [[Inferno! 11]]{{CME}}*{{Endn|17}}: [[Harlequin (Novel)]]{{CME}}*{{Endn|18}}: [[Chaos Child (Novel)]]{{CME}}*19: [[Dark Heresy: Daemon Hunter]]**{{Endn|19a}}: pgs. 18-19**{{Endn|19b}}: pg. 74**{{Endn|19c}}: pg. 90**{{Endn|19d}}: pg. 94*{{Endn|20}}: [[White Dwarf 240 (UK)]], pgs. 32-33*21: [[Codex: Dark Angels (6th Edition)]]**{{Endn|21a}}: pg. 25**{{Endn|21b}}: pgs. 36-38**{{Endn|21c}}: pg. 52**{{Endn|21d}}: pg. 57*22: [[Ravenor: The Omnibus]]**{{Endn|22a}}: pg. 306-307{{CME}}**{{Endn|22b}}: pg. 570{{CME}}*{{Endn|23}}: [[Rogue Trader: Edge of the Abyss]], pg. 51*{{Endn|24}}: [[Codex: Chaos Space Marines (3rd Edition, 2nd Codex)]], pg. 8*25: [[Codex: Chaos Space Marines (6th Edition)]]**{{Endn|25a}}: pg. 24**{{Endn|25b}}: pg. 25**{{Endn|25c}}: pg. 26*26: [[Warhammer 40,000 6th Edition Rulebook]]**{{Endn|26a}}: pg. 171**{{Endn|26b}}: pg. 172**{{Endn|26c}}: pg. 173**{{Endn|26d}}: pg. 175**{{Endn|26e}}: pg. 176**{{Endn|26f}}: pg. 177**{{Endn|26g}}: pg. 344*{{Endn|27}}: [[Rogue Trader: Hostile Acquisitions]], pgs. 18-19*{{Endn|28}}: [[Imperial Armour Volume Two - Space Marines and Forces of the Inquisition]], pg. 64</div>
[[Category:Timeline]]
[[de:M41]]
[[fr:M41]]
