Attack on Aemilius

The Attack on Aemilius was an Imperial castigation campaign carried out by the Black Knights Space Marine Chapter upon the vitally important hive world of Aemilius, located in the Segmentum Pacificus. During the campaign to put down planet-wide insurrection, the Chapter discovered several Fallen hiding amongst the heretic forces. Deploying their elite formations of the 1st and 2nd Companies, the Black Knights successfully capture several Fallen, and make haste to their progenitors - the Dark Angels - so that they will interrogated upon the Rock by their merciless Interrogator-Chaplains.

History
The Black Knights deploy upon the hive world of Aemilius to put down a planet-wide insurrection that had been instituted by hidden Chaos cults. The Chapter strikes like a thunderbolt, deploying the entirety of the Chapter in a massive drop pod and gunship assault. They quickly make short work of the mortal cultists, crushing each ad hoc force in a series of brutal combined-arms engagements that sees the cultist and traitor PDF forces corralled into Aemilius' capital hive city. As the battle rages, the Chapter's Chief Librarian detects several Fallen ensconced within the hierarchy of the cult's leadership within the hive capital. He quickly determined that they had taken refuge within a massive industrial manufactorum. The Black Knights employ the entirety of the Lion Guard and the Ravenclaws during the final assault. A vicious battle erupts between the elite companies of the Black Knights and the traitor forces, but after two hours of brutal fighting, the traitors lay broken and bleeding. The few remaining leaders are taken back to their flagship, The Wrath of Caliban, to be taken to The Rock for slow, painful interrogation by the Dark Angels notorious Interrogator-Chaplains.