Purging of Croi

The Purging of Croi was one of the earlier campaigns conducted by the Steel Hart Space Marine Chapter against a large invasion force of Orks that were sieging the formerly isolated world of Croi. The Steel Heart immediately took part in the fighting between the two opposing forces and began attacking the Orks in earnest, striking at the Greenskins like avenging angels.

History
During a patrol of the Eastern fringes of Segmentum Ultima, the Steel Hart discovered the ragged armies of Croi punching a hole through the center of an Ork horde. Easily dispatching the Greenskin menace, the Astartes at war struck the humans dumb. Eager to join the Imperium after such a display, the Steel Hart instated themselves as the guardians of Croi and it's system, defending the Imperium's Easternmost domain from xenos and Chaos invasions.