Black Crusade

This article is about the crusades waged by the forces of Chaos in Warhammer 40,000. For the role-playing game by Fantasy Flight Games, see Black Crusade (RPG).

Just as the Imperium of Man wages Crusades against Xenos and Chaos, starting with the Great Crusade, led by the Emperor of Mankind Himself, the minions of the Ruinous Powers have launched several Black Crusades against the civilizations of the galaxy.

Horus Heresy

The Horus Heresy might be thought of as the biggest Black Crusade of all, when Warmaster Horus, Primarch of the soon-to-be Black Legion, led his Legion and eight others, the very first Chaos Space Marines, to try and overthrow the Emperor. They left the Imperium in ruins, but were narrowly defeated in orbit around Terra.

Abaddon's Black Crusades

Ezekyle Abaddon, Warmaster of Chaos, is the most prolific Black Crusader. He has launched thirteen Black Crusades in his ten millennia of serving Chaos, and he opens each one with the same words Horus used to launch his Heresy (which, since Abaddon is hinted to be a clone of Horus, might be retroactively called the Zeroth Black Crusade): "Let the galaxy burn!" His Black Crusades also end in the same way that the Horus Heresy did: failure. The Black Legion gains and loses ground in and around the Eye of Terror, but Abaddon hasn't gotten anywhere close to conquering Terra in the ten thousand years since the Horus Heresy. These constant failures have not escaped the eyes of the fanbase, and GW tried to explain that the first twelve were simply aimed at gathering various superweapons and generally undermining the Imperium. A full list of what he actually did is as follows:

• 1st Black Crusade: Abbadon cemented the dominance of the Black Legion - and his rule over it by scouring thousands of worlds in Segmentum Obscuras even though his fleet eventually had to retreat, it took Rogal Dorn's life to stop the crusade. He also acquired Drach'nyen from the Tower of Silence on Uralan.
• 2nd Black Crusade: Abbadon destroyed an Imperial Navy base and the shipyards on Belis Corona and cursed the planet's moon to unleash a mutagenic plague upon the planet's inhabitants in the future. Later sacked the Inquisitorial vaults on Nemesis Tessera – butchering the Imperials and freeing all the Daemons imprisoned in the fortress.
• 3rd Black Crusade: The Daemon Prince Tallomin is unleashed on the Cadian Gate. Tallomin is banished by a dozen Chapters of Astartes, after slaughtering many millions of Imperial soldiers. It was all a distraction, as Abaddon could now desecrate the tomb of Saint Gersthal on the shrine world of the same name without any resistance, thereby preventing a prophecy of ultimate Imperial victory from coming true.
• 4th Black Crusade: Abbadon assaulted the world of El'Phanor, a stronghold of the Cadian Gate. The planet was left a dead wasteland, leaving Cadia vulnerable to later attack.
• 5th Black Crusade: The one where Abbadon summoned Doombreed.
• 6th Black Crusade: Acting on a tip-off from Be'lakor (yes, the same guy from Fantasy), Abbadon allies with the Sons of the Eye, a splinter faction that had broken off from the Sons of Horus shortly after the Siege of Terra. After annihilating a Forge World with their help, Abbadon executes the Sons' warlord and forces him to watch his men pledge their loyalty to the Black Legion as he dies.
• 7th Black Crusade: Abbadon steals some Eldar artifacts from the Adeptus Mechanicus and leaves before the Imperium can muster a response. The Blood Angels try to cut off his escape but are routed- their geneseed is used to bolster the Black Legion's numbers, courtesy of Fabius Bile.
• 8th Black Crusade: The Black Legion engages in a ritual sacrifice known as the Skullgather. They slaughter specific numbers of people on specific worlds, and arrange the dead in specific patterns. Hundreds of adepts of the Inquisition are driven insane in trying to break the cipher, while Imperial forces are too busy pursuing Abaddon's fleet to realize what he's doing. It ends with the council of Tech-Magi being sacrificed in the gears of the Forge World Rithcarn, completing the sequence of death and pleasing Tzeentch.
• 9th Black Crusade: Abaddon musters several Traitor Legions for the purpose of strangling the power of Cancephalus, a naval fortress that acted as a base for Imperial ships patrolling the Eye of Terror for any activity. Abaddon proceeds to massacre and mutate the people of Antecanis, a heavily populated world that provided most recruits and officers for Cancephalus. The Traitors depart after having annihilated the response fleet from Cancephalus, thereby crippling the Imperial Navy's power and opening up new routes for Chaos Space Marines to exit the Eye of Terror.
• 10th Black Crusade: Abbadon assaults the Helica Subsector (of Eisenhorn fame) with the aid of the Iron Warriors, sending out some of his minor warlords as a distraction while he and Perturabo attack the Iron Hands' homeworld of Medusa. The Iron Hands barely hold on, and Abbadon and Perturabo leave after they are satisfied with what they have learned about Medusa's defenses. While technically victorious, the Iron Hands have suffered severe casualties and many of the worlds in their system have been destroyed.
• 11th Black Crusade: After binding a Daemon of Tzeentch within the oculus of his vessel in the hope that it may find new routes through the Warp storms, Abbadon gets caught in a warp storm and ends up in orbit over the planet Relorria. There the Traitor Marines encounter Orks, and a three-sided war breaks out. Abaddon takes many Orks as prisoners, after which he departs and leaves the humans of Relorria to deal with the remaining Xenos. He later discovers their connection to the warp and begins experimenting with them to see if they could be used to create Ork-Daemon hybrids.
• 12th Black Crusade: The one where he got the Blackstone Fortresses. See Battlefleet Gothic.
• 13th Black Crusade: The last event in Games Workshop's official 40K timeline, beginning on 995999.M41. Back in Third Edition, GW ran the "Eye of Terror" worldwide campaign to determine the outcome of the war. Going by the numbers of the battles sent in (admittedly not a tamper-proof measure), the forces of Chaos actually won, but that would have disrupted the status quo, so they attenuated the outcome. As things stand (perpetually frozen at the brink of M42), Abaddon has overrun most of Cadia and Segmentum Obscuras and is trying to solidify his gains; however, the Imperium is losing ground so fast even Creed is having trouble holding the planet and rumor has it that the Daemon Primarchs are going to intervene personally. Even worse, Abaddon figured out that the pylons that maintain the Cadian Gate could be overloaded by summoning enough Daemons, which would lead to Cadia becoming a Daemon World and letting the Eye of Terror expand faster than the Goatse guy's anus.

Necrons!?

Considering that the Necrons are getting the spotlight in Imperial Armor Volume 12, expect for the Necrons to become more involved in the 13th Black Crusade as Abaddon tries to overload the pylons maintaining the Cadian Gate. Before you scream deus ex machina (or perhaps merely deus machina), recall that early battle reports from the background material of the Eye of Terror campaign mentioned a Necron expeditionary force operating in Segementum Obscurus almost exclusively against the Forces of Chaos. Furthermore it should also be recognized that the Necrons almost certainly built the Cadian pylons and would have the most to lose after the Imperium and the Eldar should the Eye of Terror expand.

7th Edition Codex has indeed shown there are a large amount of Active Necrons Tomb Worlds around the Eye.

14th Black Crusade

/tg/ has gotten tired of the so-called "Failbaddon's" antics, and so somebody decided to take matters into his own hands and launched Abaddon Quest, in which /tg/ controls Abaddon's 14th Black Crusade. He's doing much better this time around (baring a few acts of sexual deviancy that even Chaos Marines found unsettling).

Other Daemon Princes

Abaddon is not the only favored son of Chaos; other Daemon Princes have launched their own Black Crusades now and then. Obviously, they haven't done any better than Abaddon did, or we would have heard more about them! lol, they've actually managed to succeed at their Crusades. Thus making them superior to Abaddon. Granted their ultimate goals aren't as grandiose, but hey, wins are wins.