4th Black Crusade
|Black Crusades of Abaddon the Despoiler||1st - 2nd - 3rd - 4th - 5th - 6th - 7th - 8th - 9th - 10th - 11th - 12th - 13th|
|Outcome||Chaos retreat, Black Legion objective achieved|
|Imperium||Forces of Chaos|
|Kromarch(KIA)||Abaddon the Despoiler|
| Unknown military losses
heavy civilian losses
The Fourth Black Crusade of Abaddon the Despoiler, also called the Devastation of El'Phanor and the Death of the Kromarch, was launched to destroy the Grand Citadel of Kromarch, a linchpin in the defences of the Cadian Gate.
The Fourth Black Crusade would prove to be highly costly to the Imperium, seeing the destruction of the Citadel of Kromarch and the loss of many lives. The attack began in 001.M34 and was led by Abaddon the Despoiler.  Abaddon had learnt well from his last two Black Crusades and besieged the walls of Cadia while taking the bulk of his forces out into the wilds of the Segmentum Obscurus.[Needs Citation]
On his drive to Terra, Abaddon landed his forces on El'Phanor and this was where his attack would end. Abaddon led his forces personally against the defenders, his followers and warriors dropping all around him in the attack on the great citadel of the Kromarch, until the walls crumbled and his attack was pressed home thanks to his Daemon Sword Drach'nyen sundering the gates. Once inside the Citadel, Abaddon extinquished the ancient line of Kromarch and his kin and destroyed the ancient monolith within.
Abaddon then gave his troops free reign over the city and no man, woman or child was free from the assaults of Chaos. This move doomed Abaddon however, as it gave the Imperial forces time to regroup and plan revenge on Chaos. The Imperial forces fell on the tide of Chaos and wiped it from the face of the planet, few escaping back to the Eye of Terror, signalling the end of the Black Crusade.[Needs Citation]
- 1: Codex: Chaos Space Marines (6th Edition), pg. 22
- 2: Black Legion - A Codex: Chaos Space Marines Supplement pg.33
- 3: Liber Chaotica: Khorne, Black Crusades
- 4: Codex: Chaos Space Marines (8th Edition) pg.23