|[[Warp Storm]] ''[[Gae-sann]]'' envelops the [[Kai]] system and absorbs it into the [[Eye of Terror]].{{Fn|[[Codex: Chaos Space Marines (3rd Edition, 2nd Codex)]]1}}

|The [[Blackstar Crusade]]. [[Chaos]] forces emerge from the [[Eye of Terror]] to mount a crusade into the [[Ganglax Sector]]. [[Khorne]] champion [[Ekrak]] conquers [[M'laan XIII]] and turns it into a [[Daemon World]].{{Fn|2}}|-|Late M34{{Fn|5}}|[[Obscuran Uprising]]s. The [[Sons of Vengeance]] crush the [[Free Council of Hannedra II]] and then turn renegade.{{Fn|5}}|-|Late M34{{Fn|6}}|[[Ecclesiarchy]] power wanes.{{Fn|6}}|-|Late M34{{Fn|7}}|The [[Pale Wasting]]. Eleven [[Space Marine]] [[Chapter]]s are lost to an unknown enemy originating from the [[Ghoul Stars]].{{Fn|7}}|}  ==000-099.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''|-|001.M34{{Fn|1}}{{Fn|3}}|The [[4th Black Crusade]]. Destruction of the [[Citadel of Kromarch]] on [[El'Phanor]] before crushed.{{Fn|1}}{{Fn|3}}|-|085.M34{{Fn|4}}|The [[Terrorforming of Atasca IV]] is carried out.{{Fn|4}}|}  ==100-199.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''|-|101.M34{{Fn|8}}|[[Dark Angels]] [[Chapter Master|Supreme Grand Master]] [[Armaros (Dark Angels)|Armaros]] contracts [[Bloodpox]] while leading the fight against the [[Death Guard]] and the [[Brotherhood of Plague]]. He immediately passes the [[Lion Helm]] to his successor and steps into [[The Rock]]'s main reactor, killing himself before he can spread the disease.{{Fn|8}}|-|118.M34{{Fn|9}}|In the [[Hour of Shadow]], [[Chapter Master]] [[Khardin Gol]] of the [[Black Wings]] and numerous Imperial lords are assassinated, plunging [[Lorin Alpha]] into civil war. The Black Wings pursue the [[Tenebrae]] Chaos renegades into the [[Veiled Region]].{{Fn|9}}|}  ==200-299.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''|-|216.M34{{Fn|10}}|While enforcing the quarantine zone around the [[Pale Wasting]], [[Raukaan Clan]] ruthlessly exterminates fleeing [[xenos]], as well as the entire [[Yormethi 26th]] [[Imperial Guard Regiment|regiment]].{{Fn|10}}|-|230.M34{{Fn|11}}|The [[Trachesai Massacre]]. [[Blood Angels]] [[Devastator Squad]]s are noted to rush the enemy to engage in close combat.{{Fn|11}}|}  ==400-499.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''|-|401.M34{{Fn|12}}|[[The Howling]]: A strikeforce of [[Black Templar]] [[Space Marines]] kill the [[Cacodominus]], a powerful [[alien]] [[psyker]]; the resultant psychic death-scream burns out the minds of a billion [[astropath]]s and disrupts the [[Astronomican]]. Millions of ships are lost and entire [[sub-sectors]] lose contact with the wider [[Imperium]].{{Fn|12}}|-|438.M34{{Fn|9}}|A single [[strike cruiser]] bearing [[Black Wings]] livery returns from the outer void. The handful of survivors refuse to speak of what they had endured to anyone save agents of the [[Ordo Malleus]]. As they rebuild from their stocks of [[gene-seed]], the Black Wings declare an eternal oath of vendetta against [[Tenebrae]].{{Fn|9}}|-|456.M34{{Fn|8}}|[[Inquisitor]] [[Halleck]] captures the notorious [[heretic]] known as the [[Angel of Truth]]. He claims to have broken the Angel but disappears en route back to [[Terra]]. The [[Dark Angels]] strike cruiser ''[[Black Sword of Vengeance]]'' investigates and finds no trace of the Inquisitor, his vessel, or his prisoner.{{Fn|8}}|-|490.M34{{Fn|9}}|The [[Rampagers]]' [[Space Marine Company|6th Company]] topples the rebel theocracy of [[Dabenlar III]] in a single night before brutally purging the population of heresy and asserting recruitment rights over them. See also - [[The Dabenlar III Campaign]]{{Fn|9}}|-|498-601.M34{{Fn|13a}}|Following the campaigns that are later called the [[Berillia Massacres]], the Shining Blades' methods are called into question. They attack their allies and the [[Red Scorpions]] are sent to bring them to justice. The Shining Blades reveal their true allegiance to [[Slaanesh]] in the ensuing war and declare themselves the [[Flawless Host]].{{Fn|13a}}|}  ==500-599.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''

|001ca. 500.M34{{Fn|14}}{{Fn|15}}|The [[4th Black CrusadeEighth Founding]]. Destruction of Space Marine Chapters created in this Founding include the [[Citadel of KromarchMantis Warriors]] on and the [[El'PhanorAngels Revenant]] before crushed.{{Fn|14}}{{Fn|15}}|[[Liber Chaotica}  ==600-699.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background: Khorne]], [[Codex#4F4F4F align=center|'''Year'''|style=background: Chaos Space Marines (3rd Edition, 2nd Codex)]]#4F4F4F align=center|'''Event'''

|401600-730.M34{{Fn|13b}}|The Howling: A strikeforce of [[Black TemplarIron Warriors]] on [[Space MarinesMedrengard]] kill come to civil war, shattering into numerous warbands. As abruptly as the Cacodominusfighting began, a powerful [[alien]] [[psyker]]; it stops. Some attribute the resultant psychic death-scream burns out violence to the minds plans of a billion their daemon [[astropathsPrimarch]] and disrupts the [[AstronomicanPerturabo]]. Millions of ships are lost and entire [[sub-sectors]] lose contact with , in order to cull the wider [[Imperium]]weakness from his legion.{{Fn|[[Warhammer 40,000 5th Edition Rulebook]]13b}}

|647.M34{{Fn|16}}|The [[Remembrancer|Documentarian]] [[Lasko Pyre]], the only known slave to have escaped the [[Dark Eldar]] city of [[Commorragh]], commits suicide.{{Fn|[[Codex: Dark Eldar (3rd Edition)]]16}}

|666.M34{{Fn|17}}|The first sighting of a [[Warp Star]] after a fierce storm bursts out from the [[Eye of Terror]].{{Fn|17}}|[[Warhammer 40,000 6th Edition Rulebook]], pg}  ==700-799.170M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''

|843764.M34{{Fn|18}}|[[The Imperial frigate ''Hand Shattering]]. [[Craftworld]] [[Lugganath]] comes under vicious attack from a psychically-shielded fleet of Mercy'' responds to a faint distress call originating from the [[GrendelEmperor's WorldChildren]]. There they find the entire planet dead{{Fn|18}} After thousands of Eldar die, [[Hemlock Wraithfighter]]s route the work of the [[Night LordsChaos Space Marine]]s who are harried by [[Harlequin]]. Observations of the genocide lead to an understanding of how the Night Lords operate.|s and [[Index Astartes IIGhost Warrior]], pgs every step of the way. 26{{Fn|20}}

|934777.M34{{Fn|21}}|The alliance between craftworlds [[Iyanden]] and [[Warnings Biel-Tan]] begins to fade after the events of Ulthwé[[Rasilena]]. Biel-Tan began a bloody war to reclaim the [[maiden world]]from encroaching humans.Iyanden judged reclamation held no benefit to the ongoing war against [[Chaos]] and refused to send aid. Biel-Tan emerged victorious, if bloodied, against two entire [[Battlefleet|sector fleets]] and ten [[Warhammer 40,000 6th Edition RulebookSpace Marine Chapter]]s. Thereafter, pgthe two craftworlds' unity of purpose was lost and assumed each other uncommitted to their alliance.{{Fn|21}}|} ==800-899.170M34=={|align=center border="1" cellpadding="5" cellspacing="0"|style=background:#4F4F4F align=center|'''Year'''|style=background:#4F4F4F align=center|'''Event'''

|Late 843.M34{{Fn|19}}|The Imperial frigate ''[[Obscuran UprisingHand of Mercy (Ship)|Hand of Mercy]]s. The '' responds to a faint distress call originating from [[Sons of VengeanceGrendel's World]] fought against . There they find the entire planet dead, the work of the [[Free Council of Hannedra IINight Lords]], but then turned renegade.Observations of the genocide lead to an understanding of how the Night Lords operate.{{Fn|19}}|}  ==900-999.M34=={|align=center border="1" cellpadding="5" cellspacing="0"|[[Codexstyle=background:#4F4F4F align=center|'''Year'''|style=background: Chaos Space Marines (4th Edition)]] p.17-18, 24)#4F4F4F align=center|'''Event'''

|Late 934.M34{{Fn|[[Ecclesiarchy]] power wanes17}}|The [[Codex: Sisters Warnings of Battle (2nd Edition)Ulthwé]].{{Fn|17}}

|Late 979.M34|The [[Pale Wasting]]. Eleven [[Space Marine]] [[Chapter]]s are lost to an unknown enemy originating from the [[Ghoul Stars]].|[[Imperial Armour Volume Nine - The Badab War North- Part OneSouth Mars Conflict]], p.118{{CME}}