Purification of Moirae

The Purification of Moirae was an Imperial castigation campaign carried out by the Invictors of Mars Space Marine Chapter alongside their Adeptus Mechanicus allies against the heretek Tech-Priests of the recalcitrant forge world of Moirae, in the wake of the wider conflict, known as the Moirae Schism. For daring to espouse unorthodox teachings that went against the accepted teaching of the Cult Mechanicus, Moirae suffered an ignominious fate of being blasted to ashes by a large fleet sent by Mars. Despite rendering Moirae into a dead world, the conflict between traditionalist and radical elements of the Adeptus Mechanicus and Mechanicus-aligned Space Marine Chapters would continue to flare up intermittently throughout the next standard millennium before the schism was finally ended.

History
After the beginning of the Moirae Schism and the follow-up conflict between the Adeptus Mechanicus orthodox and radical forces, Mars tasked a Division of the Chapter to assist in the purification of the recalcitrant forge world alongside other allied forces. Hell rained from above where non-stop bombardment hailed from. Below, the screams of the populace could be heard over the fleet-wide vox, damning the Imperium for their betrayal. Even after the planet was reduced to ash, the Moirae cult continued to spread further. With new commands from the Fabricator-General of Mars and the tactic permission granted to the Chapter by the High Lord of Terra, the Guardians launched a murderous campaign against the hereteks, slaying any believer in such a twisted interpretation of the Omnissiah.