Fall of Contrition

The Fall of Contrition is the name of the xenocidal defensive campaign conducted by the Star Wardens Space Marine Chapter alongside the Ordo Xenos to help purge the Imperial penal world of Contrition from an Genestealer Cult.

Background
Responding to a distress signal sent out by Inquisitors Karen Mareev and Caleb Cristo of the Ordo Xenos, the Star Wardens fleet arrived to help liberate the penal world of Contrition from a massive genestealer cult uprising and to help protect it from an incoming hive fleet. Fighting alongside the forces of the Deathwatch and the Adepta Sororitas they moved from prison bloc to prison bloc clearing it of the genestealer taint, however, the xenos infestation was endless and for each killed two more clawed fiends took their place. As a splinter of the hive fleet known as the Court of the Nephilim King arrived in the system, the Death Watch and the Star Wardens ascended to the void to attempt to destroy the splinter before it could consume the planet. Although many mycetic spores would get past the imperial fleet and land great bio-titans onto the planets surface the combined might of the Death Watch and the Star Wardens managed to destroy the bioships of the Tyranids. Contrition itself, however, proved to be tightly held in the grip of the xenos and Inquisitor Mareev declared Exterminatus on the planet, which the Star Warden vessels helped execute.