Changes

|The [[Ultramarines]] begin to fortify the eastern bounds of [[Ultramar]] against the [[Tau Empire]].{{Fn|3d}}

|-

|}

!Year

!Event

|-

|rowspan=4|801.M41

|-

|The [[Astronomican]] flickers, resulting in thousands of ships being lost in the [[Warp]].{{Fn|42b}}{{Fn|60b}}

|-

|[[Hive Fleet]] [[Naga]] enters the galaxy from the [[Eastern Fringe]].{{Fn|44c}}

|-

|[[Judgement of Hellenus]]{{Fn|8c}}

|-

|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|9j}}

|-

|804.M41

|-

|805.M41

|[[Marneus Calgar]] leads three [[Ultramarines]] companies against [[Waaagh! Gutshredda]] in the [[Forgoil]] system. In only three weeks, the Ultramarines halt the Waaagh! by destroying the Orks' [[tellyporta]] ships and [[Stompa]] factories. Calgar personally leads a [[Terminator Squad]] in a boarding action of Gutshredda's flagship, ''Da Superdestructa''.{{Fn|3d}}

|-

|806.M41

|-

|807.M41

|[[Purgation of Jhanna]]: [[Marneus Calgar]] leads two [[Ultramarines]] companies in the recapture of rebellious oceanic cities of [[Omon]] and [[Vorlencia]] against renegades and [[Chaos Space Marines]].{{Fn|46a}}

|-

|674.810.M41

|-

|rowspan=3|811.M41

|[[Dark Eldar]] raiders mount occasional but highly damaging raids on the main habitation area of [[Naxos]], Colony One, until a force of Space Marines from the [[Iron Snakes]] chapter under the command of Captain [[Trokus]] turns up to resolve the situation.{{Fn|56}}

|-

|''[[Wayward Son]]'', an escort vessel belonging to the flotilla of [[rogue trader]] [[Caleb Gilderoy]], appears at the outer perimeter of an [[Adeptus Mechanicus]] outpost at [[Harrow Watch]]. Garbled communications claim that the ship suffered severe damage from hostile xenos and a warning of a force that destroyed Gilderoy's flotilla. The ship refuses to turn back and is destroyed when it enters Harrow Watch's exclusion zone.{{Fn|32b}}

|-

|The merchant brig ''[[Daughter of Regals]]'' is lost with all hands. The [[Rak'Gol]] are believed to be responsible.{{Fn|9h}}

|-

|rowspan=2|812.M41

|Fleets from the [[Malan'tai]], [[Iyanden]], and [[Idharae]] [[Craftworld]]s eliminate [[Hive Fleet]] [[Naga]], but a [[Doom of Malan'tai|single bioform]] infiltrates and consumes Malan'tai.{{Fn|39}}{{Fn|44c}}{{Fn|44f}}

|-

|The [[Purging of Contqual]]: The [[Iron Hands]] drive the forces of [[Chaos]] from a dozen planets on the [[Contqual]] subsector.{{Fn|3f}}

|-

|199.812.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}}{{Fn|2h}}

|-

|rowspan=2|813.M41

|[[Necron|Unidentified robotic forces]] annihilate the [[Tau Empire]] colony of [[Cano'var]].{{Fn|29c}}

|-

|[[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}}

|-

|166.813.M31{{CME}}

|-

|212.813.M41

|-

|897.814.M41

|-

|rowspan=2|815.M41

|Contact is lost with Explorator Fleet 913. Three companies of the [[Ultramarines]] are sent to investigate, but find only empty vessels drifting in space.{{Fn|3d}}

|-

|[[Dal'yth]] [[sept]] receives unexpected aid from Commander [[O'Shovah|Farsight]] to repel an invasion by the [[Ork]] [[warboss]] [[Grog]].{{Fn|29c}}

|-

|255.815.M41

|-

|818.M41

|[[Throth Half-Head]] of the [[Space Wolves]] defeats the giant [[Ur-Bolg]] wreaking havoc on [[Fenris]].{{Fn|38a}}

|-

|649.818.M41

|-

|rowspan=2|819.M41

|A perceived insult provokes fighting between the [[Mortifactors]] and the [[Crimson Fists]]. Only an intercession by [[Ultramarines]] [[Chapter Master]] [[Marneus Calgar]] prevents open war, and the incident is kept secret from the [[Adeptus Terra]].{{Fn|3f}}

|-

|An outbreak of contagious madness and despair affects [[Ilsig Hive]] on [[Chemarium II]], causing thousands to kill themselves. Civil order collapses. [[Ranker Nonesuch]], the self-titled "Beggar King," arises to lead his followers to overthrow the planetary government and spread his malevolence to the rest of the system. An exclusion zone is established around the system.{{Fn|32b}}{{Fn|32c}}

|-

|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}}

|-

|-

|821.M41

|-

|rowspan=2|822.M41

|Forces from [[Craftworld]] [[Alaitoc]] drive off a raid on [[Ildanira]] by [[Ezekyle Abaddon|Abaddon the Despoiler]]{{Fn|42b}}

|-

|-

|101.822.M41

|-

|054.823.M41

|-

|077.823.M41

|-

|158.823.M41

|-

|711-735.823.M41

|-

|082.824.M41

|-

|249.825.M41

|-

|803.825.M41

|-

|2.059.826.M41

|-

|714.826.M41

|-

|989.826.M41

|-

|101.827.M41

|-

|273.827.M41

|-

|628.827.M41

|-

|412.828.M41

|-

|081.830.M41

|-

|rowspan=3|159.830.M41

|-

|-

|-

|288.830.M41

|-

|411.830.M41

|-

|414.830.M41

|-

|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}}

|-

|833.M41

|-

|835.M41

|The [[War for Piety]]. [[Piety (Shrine World)|Piety]] emerges from a [[Warp storm]] overrun by [[Daemons]]. [[Canoness]] [[Sariah]] leads a mission of her [[Order of the Sacred Rose]] to recover valuable artifacts from the Reliquary of Hope, one of the few untainted areas. Only the Canoness and two Celestians survive entering the Reliquary, but recover Saint [[Dolan]]'s right thighbone and three pages of the [[Lexicon of Falsehoods]]. They leave just before a fleet of [[Grey Knights]] arrives and performs [[Exterminatus]] on the planet by [[cyclonic torpedoes]].{{Fn|64}}

|-

|837.M41

|[[Space Wolves]] and [[Flesh Tearers]] fight, brother against brother, in a dark moment for both [[Chapters]] at the battle of [[Honour's End]].{{Fn|38b}}

|-

|841.M41

|Ninety-four years after the [[Battle for Macragge]], the [[Ultramarines]] [[First Company]]'s operational strength exceeds fifty percent for the first time.{{Fn|3d}}

|-

|844.M41

|[[Chinchare Hrud Infestation]]{{Fn|8c}}

|-

|rowspan=2|845.M41

|[[Dark Eldar]] pirates capture [[Warmaster]] [[Ingenus]], commander of the [[Dimmamak War]], escalating the situation. In response, all high ranking [[Imperial Guard]] officers are assigned bodyguards and another forty thousand regiments are raised.{{Fn|45a}}

|-

|The [[Blood Swords]] [[chapter]] purges the [[Inando]] system. More than one hundred billion Imperial citizens are slain in the resulting [[Exterminatus]] actions.{{Fn|3f}}

|-

|rowspan=3|849.M41

|[[Cato Sicarius]], [[Space Marine Captain|Captain]] of the [[Ultramarines]]' Second Company, is appointed [[High Suzerain of Ultramar]].{{Fn|3d}}

|-

|All contact is lost with [[Birmingham]], the Black Planet. Subsequent investigations confirm a [[Dark Eldar]] massacre.{{Fn|42b}}

|-

|The 813th [[Feast of Blades]]. [[Hervald Strom]] of the [[Iron Knights]] is victorious yet again, despite suffering heavy wounds in the [[Vinculus Crusade]]. It is the first time in the history of the event that a single Chapter, let alone a single Champion, has won two successive victories.{{Fn|3f}}

|-

|850.M41

|Inquisitor [[Solomon Lok]] leads an expedition to the [[Anphelion System]]. See also - [[Anphelion Project]]{{Fn|42b}}

|-

|850-901.M41

|-

|852.M41

|The [[Invaders]] [[chapter]] assault the [[Eldar]] [[Craftworld]] [[Idharae]]. They succeed in destroying the planet, despite taking horrendous casualties.{{Fn|3f}}

|-

|rowspan=3|853.M41

|[[Battle of the Steel Cross]]. Captain [[Cortez]] of the [[Crimson Fists]] slays an [[Ork]] [[Warboss|Warlord]] and his bodyguard.{{Fn|46b}}

|-

|The [[Daemonbane War]]: The [[Great Company]] of [[Wolf Lord]] [[Sven Bloodhowl]] is saved on the world of [[Yaogeddon]] when the [[Radical]] [[Inquisitor Lord]] [[Querrian]] turns the rival hordes of [[Khorne]] and [[Slaanesh]] against each other. When the [[Ordo Malleus]] demands Querrian's execution, the [[Space Wolves]] fight against their forces until Querrian can escape.{{Fn|38b}}

|-

|The [[Second Krandor Rebellion]].{{Fn|26c}}

|-

|855.M41

|The [[Assault on Black Reach]]: The [[Ultramarines]] Second Company under Captain [[Cato Sicarius]] defeats [[Waaagh! Zanzag]] on [[Black Reach]].{{Fn|3d}}{{Fn|3b}}

|-

|rowspan=2|857.M41

|[[Saim-Hann]] Eldar launch a surprise assault on the Mortant VII 'Headhunters' during the Sacking of [[Colonia]]. A single squad of [[Catachan Jungle Fighters|Catachan Devils]], led by [[Imperial Guard Sergeant|Gunnery Sergeant]] [[Harker]] drives back the xenos after emerging from cover and killing the Eldar's [[Autarch]].{{Fn|45a}}

|-

|The fleet of the [[Silver Skulls]] [[chapter]] blockades the worlds of the [[Lazar]] system for three years. Since the worlds are dead, questions are asked, but no answers are ever given by the Silver Skulls.{{Fn|3f}}

|-

|858.M41

|The [[Defence of Dimmamar]]: The birth world of [[Sebastian Thor]] is suddenly attacked by [[Farseer]] [[Kauerith]] leading elements of the [[Eldar]] [[Craftworld]] [[Ulthwé]]. Though no reason for the attack is evident, the Farseer is killed in the course of the battle by Seraphim Superior [[Amelda]] of the [[Order of the Bloody Rose]] and her squad.{{Fn|64}}

|-

|rowspan=2|861.M41

|[[Battle of Arconar]]. [[Marneus Calgar]] defeats a coalition of [[Eldar]] Raiders on the feral world of [[Arconar]], scattering their forces and capturing their bases both on and off world.{{Fn|46a}}

|-

|The [[Ultramarines]]' [[chapter]] records indicate that they have finally replaced their losses from the [[Battle for Macragge]].{{Fn|3d}}

|-

|862.M41

|[[Waaagh! Skullkrak]] invades the [[Targus system]]. [[Kayvaan Shrike]] and the [[Raven Guard]] Third Company are among the forces that respond.{{Fn|3f}}

|-

|863.M41

|The [[Saint Cyllia Massacre]]: The [[Adamant Fury]] [[Titan Legion]] falls to Chaos and massacre the [[Saint Cyllia]] [[PDF]] before escaping.{{Fn|42b}} Leading the Cadian 423rd, Knight Commander [[Pask]] engages rearguard elements of the traitor Titan Legio.{{Fn|45a}}

|-

|865.M41

|The Purging of [[Modanna]]: [[Kor'sarro Khan]], [[Master of the Hunt]] of the [[White Scars]], drives the [[Daemon Prince]] [[Kernax Voldorius]] from his most important fortress.{{Fn|3f}}

|-

|867.M41

|[[Space Marine Captain|Captain]] [[Cortez]] of the [[Crimson Fists]] breaks through [[Eldar]] lines, despite suffering seventeen wounds, including a stab through one of his hearts and two heavy weapons hits.{{Fn|46b}}

|-

|870.M41

|[[Mogul Kamir]] and [[Imperial Guard]] [[regiment]]s of [[Attila]] deploy in force on the planet of [[Loxar IV]] to fight a three-year campaign against the [[Necrons]]. Victory is finally taken after the ill-fated charge of the Lumen Valley, the largest calvary charge to take place in records of the Imperium.{{Fn|45a}}

|-

|871.M41

|The [[Liberation of Quintus]]: With the aid of [[Kayvaan Shrike]] and the [[Raven Guard]] [[3rd Company (Raven Guard)|Third Company]], [[Kor'sarro Khan]] slays [[Kernax Voldorius]] in the streets of [[Mankarra]], and returns with the Daemon Prince's head to the [[White Scars]]' [[fortress-monastery]].{{Fn|3f}}

|-

|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}}

|-

|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}}{{Fn|38b}}

|-

|878.M41

|[[Chaos]] pirates, led by the [[Daemon Prince]] [[M'kar]], claim several uninhabited planets on the borders of [[Ultramar]]; [[Ultramarines]] Captain [[Cato Sicarius]] destroys most of the pirate fleet in a battle in the [[Halamar Rift]], though M'kar escapes into the [[Warp]].{{Fn|3d}}

|-

|879.M41

|[[Battle of Knarts Landing]]. [[Marneus Calgar]] defeats a rebel army led by General [[Dornal]] in a thirty-day battle on the industrial world of [[Knart's Landing]], taking less than 17% casualties.{{Fn|46a}}

|-

|rowspan=2|883.M41

|The largest armoured assault since the [[Battle of Tallarn]], spearheaded by the [[Cadian 423rd]], attacks and nearly annihilates a renegade [[Titan Legion]] in a battle on the [[Planus Steppes]]. Imperial forces are to endure the loss of over eight thousand tank companies and thirty five super-heavy detachments.{{Fn|45a}}

|-

|[[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}}

|-

|886.M41

|A deputation from the [[Ecclesiarchy]] visits the [[Space Wolves]]' homeworld of [[Fenris]], planning to investigate rumours of pagan worship. The Wolves open fire on the fleet, provoking a three-week war between the Wolves and three orders of the [[Adepta Sororitas]], which ends when the Ecclesiarchy decides to retreat.{{Fn|38b}}

|-

|rowspan=2|888.M41

|The [[Battle for Orar's Sepulchre]]: The entire [[Ultramarines]] [[chapter]] goes to war for the first time since the [[Battle for Macragge]] to defend [[Orar's Sepulchre]] on planet [[Commrath]] from [[Eldar]] forces from [[Craftworld]]s [[Alaitoc]] and [[Iyanden]]. In the final battle, [[Marneus Calgar]] defeats the Alaitoc [[Avatar]] in single combat.{{Fn|3d}}

|-

|The Crusade of Wrath: [[Black Templars]] defeat the [[Word Bearers]] and reclaim many worlds near the [[Maelstrom]].{{Fn|42b}}

|-

|rowspan=2|891.M41

|The Persya sector undergoes the 'long midnight' as [[Eldar]] pirates prey on them for over half the year, until driven off by Imperial Patrol Praxion.{{Fn|42b}}

|-

|On Yurk, grav-tank [[skimmer]]s from [[craftworld]] [[Iyanden]] destroy the forces of [[ork]] warlord Killfist without a single loss, preventing a [[Waaagh!]] from forming and threatening a nearby [[eldar]] colony.{{Fn|39}}

|-

|892.M41

|[[Space Marine Captain|Captain]] [[Cortez]] defends the breach in Fortress [[Maladon]]'s wall in twenty-one hours of constant fighting.{{Fn|46b}}

|-

|894.M41

|[[Betalis Campaign]] on [[Betalis III]]{{Fn|8c}}

|-

|rowspan=2|895.M41

|[[Craftworld]] [[Alaitoc]] launches a devastating invasion of the [[Invaders]]' home world in retaliation for their destruction of [[Idharae]]. With the Invaders still under-strength, only three companies escape the disaster and their [[fortress-monastery]] is destroyed. The Invaders are thereafter a spacebound chapter.{{Fn|3f}}

|-

|The [[Space Wolves]] and a host of [[Eldar]] [[Aspect Warriors]] ally to destroy the [[Waaagh!]] of [[Grimtusk Bloodboila]]. The operation is a success, but a simple mistranslation at the victory celebration afterwards leads to a fight breaking out, followed by open war between the Wolves, Eldar, and Orks.{{Fn|38b}}

|-

|rowspan=4|897.M41

|-

|-

|-

|[[Battle of Centius Prime]]{{Fn|8c}}

|-

|897-903.M41

|[[Hive Fleet]] [[Gorgon]] eats through the [[Tau Empire]] until a combined force of Tau and [[Imperium of Man]] fleets stops it at [[Kel'shan]].{{Fn|29c}}{{Fn|44d}}

|-

|898.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}}

|-

|}

|[[Codex: Chaos Space Marines (4th Edition)]], pg. 57

|-

|-

|rowspan=2|906.M41

|

|-

|-

|912.M41-Present

|-

|942.M41

|-

|rowspan=2|944.M41

|

|-

|-

|[[Dark Eldar]] of the [[Kabal of the Poisoned Heart]] destroy the [[Black Templars]] Chapter Keep on the [[Jungle World]] of [[Delleront]]. This begins the [[Crusade of Sorrow]].

|

|-

|

|-

|

|-

|-

|[[Xenos]] raiders capture the [[Shadow Wolves]] [[strike cruiser]] ''[[Purest Intent]]'' with all hands.

|

|-

|-

|The Imperium sends operatives from the [[Officio Assassinorum]] to kill the [[Cypher|Voice of the Emperor]]. None return, though one is able to relay a communication describing the target.

|-

|138.997.M41

|

|-

|221.997.M41

|-

|310.997.M41

==Trivia==

{{Trivia}}

===Notes===

*{{Endn|Note 1}}: No exact date is given, but repeated references in [[Necropolis (Novel)]] state that the Trade War took place "ninety years before" the [[Siege of Vervunhive]], which, according to [[The Sabbat Worlds Crusade (Background Book)]], took place in '''769.'''M41.{{Fn|1}}{{Fn|33x}}

*{{Endn|63}}: [[The Anarch (Novel)]]{{CME}}

*{{Endn|64}}: [[Codex: Sisters of Battle (5th Edition)]]{{CME}}

</div>