To Kill A God

To Kill a God is the name of a joint-Imperial castigation campaign against an unknown Chaos Lord and supporting heretic Forces of Chaos, which was carried out by a triumvirate of bellicose Space Marine Chapters, including the Imperius Ravagers, Wardens of Orask and the Silver Dominators, as well as supporting Collegia Titanicus and Adeptus Mechanicus forces.

History
The powerful Chaos Lord +++REDACTED+++, claiming to be a fifth Chaos God, rises to power within the Orcuz Sector, and soon, several worlds rise in open revolt. All across the surface of three Imperial worlds, the hidden covens of Chaos cultists, aided and abetted by this Chaos Lord and his Warband, the +++REDACTED+++, attack vital strategic locations. Within a matter of months, several other worlds fall into internecine conflict, and soon, nearly the entire sector declare their secession from the Imperium. To compound the problems for the Imperial defenders, reports soon reach Segmentum command that several more Heretic Astartes Warbands were involved in the fighting.

The High Lords dispatched multiple Adeptus Astartes Chapters, including the Imperius Ravagers, the Wardens of Orask and the 6th Company of the Silver Dominators, as well as a demi-Legio of god-engines of the Legio Nox ('Lords of Night'), and supporting Skitarii and Legio Cybernetica forces from a nearby forge worlds, as well as several Astra Militarum Regiments. The battle for control of the sector lasts for several decades, and is matched in intensity and ferociousness of those Astartes Chapters sent to quell the uprising, resulting in the death of millions of innocents as well as tens of thousands of heretic forces.

The conflict culminates in a final assault upon the sector capital world of Khai-Mortanus, where the Chaos Lord and the bulk of his forces have taken refuge within the planet's capital hive city. The combined forces of the Imperius Ravagers and their Astartes allies strike like thunderbolts of a wrathful god, and finally kill the Chaos Lord and wipe out his heretic forces. The world is brought back under Imperial compliance within the day.