Abyssal Crusade

From 1d4chan
The Fleets of the 30 Judged Chapters on a company-sponsored trip to Hell.

The Abyssal Crusade was a horrible disaster for the Imperium occurring at the beginning of the Age of Redemption. Saint Basillius the Elder had become Ecclesiarch in 321.M37 and immediately started working with the Inquisition and a bunch of Chapters of Space Marines to round up witches, heretics, and mutants, and a good time was had by all.

Well, until a massive Warp Storm named Dionys came to the party. A ton of Chapter home worlds were covered by warp rifts and many Chapters found their gene-seed rapidly mutating, which was, of course, heresy. Saint Basillius ordered all of the hundreds of chapters whose worlds had been affected by the storm to come to Terra to be judged. He decided (apparently on advice from his cat) that thirty of the Chapters were CORRUPTED (these Chapters would become known as... the Judged) and declared that they could either crusade into the Eye of Terror or be systematically exterminated. In typical Space Marine fashion, every Chapter chose the former.

To the surprise of nobody (nobody reading Codex: Chaos Space Marines anyway), crusading into the Eye of Terror ended up being an awful, terrible, horrible idea. The thirty Chapters got split up by a Chaos battlefleet almost immediately and landed on all kinds of wonderful Daemon worlds. Most of the Marines either died in horrific ways or were corrupted for real this time and became Chaos Space Marine warbands. Even so, the Vorpal Swords at the very least exterminated four hundred planets in the Eye of Terror. Who knows how many the other Chapters got?

Eight hundred years later (real time), a few of the Space Marines staggered out of the Warp under Konvak Lann, Chapter Master of the Vorpal Swords, and were understandably pissed. They were immediately detained by the Inquisition and questioned for Chaos taint. When they passed every test, suspicion fell on the one who had judged them in the first place; it turned out that Saint Basillius (Still alive due to extensive Juvenant treatments) was actually a worshiper of Chaos. If only the Inquisition had done their job and checked the chapters for taint themselves...

He was executed and his remains, relics, followers, scriptures and everything associated with him was gathered in freighters and shot into a nearby sun. Nobody remembers him. Consequentially, the biggest reason the Abyssal Crusade is important is that it caused the creation of dozens of new Chaos warbands.

Timeline of Warhammer 40,000
The Times of Old Wars of Secession - War in Heaven (60.000.000 BC) - Fall of the Eldar (M30)
Pre-Heresy Age of Terra (M1-M15) - Dark Age of Technology (M15-M25) - Age of Strife (M25-M30)
Great Crusade (Late M30-005.M31) Unification Wars - The Last Church - Rangdan Xenocides - Interex - Gardinaal - Faash - Council of Nikaea
Horus Heresy (005.M31-014.M31) Battle of Isstvan III - The Burning of Prospero - Battle of the Alaxxes Nebula - Drop Site Massacre - Thramas Crusade
The Battle of Phall - Battle of Calth - Signus Campaign - Imperium Secundus - Battle of Trisolian - Siege of Terra
Time of Rebirth (015.M31-M32) The Great Scouring (~015.M31) - Start of The Long War (M31) - The Legion Wars (M31) - The Battle of Skalathrax (M31)
The Battle of Harmony (M31) - Creation of the Codex Astartes (M31) - Second Founding (021.M31) - Battle of Thessala (121.M31)
The Forging (M32-M34) The War of The Beast (544.M32-546.M32) - The Beheading (546.M32) - The War of the False Primarch (780.M33-860.M33)
Nova Terra Interregnum (M34-M36) 21st Founding (M36)
Age of Apostasy (M36) Plague of Unbelief (310.M36)
Age of Redemption (M37-Early M38) Abyssal Crusade (321.M37-121.M38)
The Waning (Early M38- Early M41) Gothic War (143-151.M41) - The Macharian Crusade (392-399.M41) - The Macharian Heresy (400-470.M41)
Wars for Armageddon (444.M41, 941.M41 and 991.M41) - Damocles Crusade (742.M41)
Time of Ending (Early M41-999.M41) The Vaxi Atrocity (731.M41) - First Tyrannic War (745-746.M41) - Sabbat Worlds Crusade (755.M41-780.M41) - Siege of Vraks (813.M41-830.M41)
Massacre at Sanctuary 101 (897.M41) - Badab War (901-912.M41) - The Vaxhallian Genocide (926.M41) - Second Tyrannic War (990.M41-993.M41)
Orphean War (991.M41-Ongoing) - Third Tyrannic War (997.M41-999.M41) - Taros Campaign (998.M41) - Fall of Shadowbrink (998.M41)
Octarius War (999.M41-Ongoing) - Conquest of Uttu Prime (Late M41) - Devastation of Baal (999.M41) - 13th Black Crusade (999.M41-M42)
Age of the Dark Imperium (000.M42-Ongoing) Ultima Founding (999.M41-012.M42) - Indomitus Crusade (999.M41-Ongoing, first phase ended on 012.M42)
War of Beasts (001.M42-025.M42) - Plague Wars (~012.M42) - Psychic Awakening (M42)