Purging of the Cursed

The Purging of the Cursed was a lamentable event in the history of the Dragons Sanguine Space Marine Chapter. They were assigned, alongside their Successors, the Spectral Blood and The Copperhead Chapters, to take part in a excoriation campaign against a number of Chapters from the ill-fated 21st 'Cursed' Founding. These Chapters included the Extinguished Suns, Moon Breakers, Gore Scorchers and the Depth Stalkers. Like many of the Chapters created during this oft-maligned Founding, these four Chapters had genetic idiosyncrasies were such, that they went beyond the usual tolerance allowed by the zealous Inquisition. The required genetic-tithe of gene-seed sent to the Magos Biologis for routine examination revealed rampant mutations. Some of these Chapters had not sent a genetic sample in several decades and were suspected of hiding their genetic corruption. Therefore, these four Chapters were declared as 'Renegades' by order of the Ordo Hereticus. Led by the Dragons Sanguine, a combined triumvirate of loyalist Space Marine Chapters launch an immediate and brutal campaign against these Renegade Chapters, attacking one Chapter at a time, until their foul presence is wiped from existence.

History
The Dragons Sanguine are tasked with the purging of several designated Renegade Chapters created during the 21st 'Cursed' Founding. Aided by their Successor Chapter, the Spectral Blood, and The Copperheads Chapter, this loyalist triumvirate launch a fratricidal campaign against the Renegade Chapter. The loyalists were forced to breach several space hulks in order to find the abominations that their kin had become. With each Heretic Astartes killed, the battle-brothers of the Dragons Sanguine's sorrow for their former kin grew, as they knew that they couldn't help these afflicted Astartes in any way. After the purging missions upon their kin, they took one of each of the fallen chapter's shoulder pauldrons that had their individual chapter heraldry displayed upon them, and mounted these memento mori upon a wall in their Chapter Reclusiam in remembrance of the deaths of their formally loyalist brethren that were mutated beyond salvation, and as a stark reminder that such a lamentable task wasn't carried out in vain. Even millennia later, the Dragons Sanguine still feels sorrow for the merciful slaughter they were forced to carry out and mourn these lost Chapters.