Laeran Retribution

The Laeran Retribution was a campaign of the wider Indomitus Crusade conducted by the Blades of Morkai against the treacherous Knights of Laeran warband. During the fighting, their Chapter Master Sven Frostfang defeated their Daemon Prince in personal combat, but sustained grievous wounds in the process, which required his internment in the sarcophagus of a Dreadnought.

History
Centuries after the initial ambush that saw them lose half their fleet, the Blades of Morkai were finally able to locate where the Knights of Laeran were keeping their stolen ships, thanks to a tip from an Alpha Legionnaire by the name of Carius. The Blades of Morkai went in expecting to destroy most of the stolen ships, as they had been in Chaotic hands for centuries at this point and were likely corrupted. To their surprise, significantly more of these ships were recovered than expected, although the majority of them were still destroyed. The battle was a resounding success, though it came at a terrible price--while Sven Frostfang defeated Daemon Prince Gaius in personal combat, the wound he suffered in the process was so grievous that he had to be interred into a dreadnought.