Cleansing of Ostara

The Cleansing of Ostara was an Imperial campaign conducted by the Blades of the Lion Chapter upon the Imperial Hive World of Ostara which had become engulfed in a brutal civil war between local PDF and insurrectionist forces. To add fuel to the fire, this conflict soon took a turn for the worst with the arrival of the savage Blood Jaws Chaos Warband and their Chaos Cultist allies. After a week-long, bitterly fought campaign, the Blades of the Lion finally emerge victorious.

History
While on routine patrol, the Blades of the Lion intercepted a call for aid from the Hive World, Ostara. The planet was engulfed in a civil war between the local Imperial Guard forces and Secessionists. Compounding and escalating matters worse was a collection of local Chaos Cultists enforced by the deadly warband of Chaos known as the Blood Jaws. Originally planning to dispatch other companies, the Chief Librarian detects that the leaders of the Chaos Forces are members of the Fallen, commanding from the fortress, Borrok. Thus the Chapter's elite 1st and 2nd Companies work together to put down the Chaos uprising, and later besiege the Borrok Fortress, to route the Fallen within. The planet of Ostara is pacified of chaos taint within seven days.