Siege of Okrutta

The Siege of Okrutta was a bloody-handed purgation campaign carried out by the ravaging Blood Jaws Renegade Chapter upon the xenos-controlled world of Okrutta, against an unknown, Chaos-aligned xenos empire. This daemon world of Tzeentch was quickly subdued in a hail of bolters and blades and the xenos inhabitants were slaughtered by the murderous Heretic Astartes. After losing this planet, these xenos have sworn an eternal vow to make the upstart Renegade Chapter pay for their crimes.

History
Okrutta was a colony world of a relatively large Chaos-aligned xenos empire the Blood Jaws had discovered. This resulted in a grueling campaign against the xenos under the worship of Tzeentch, with the number of the Blood Jaws falling dangerously low before the Megalodon struck down the xenos Leader. Though, this resulted in the xenos declaring an "Oath of Malice", to slay the Blood Jaws for destroying one of their hard-earned worlds.