From Warhammer 40k - Lexicanum
Ancient Baelon is a Death Company Dreadnought in the Blood Angels Chapter and has been entombed since the late M39, when he fell in battle during the Kemmock Insurrection. He now serves as the lynchpin for the Death Company strike force known as The Mourned, which are attached to the Blood Angels' Second Company, and are currently fighting the Tau of the N'dras Sept, on the borders of the Damocles Gulf. Though Baelon commands enough order and respect from the rest of The Mourned to ensure their missions are achieved, the Second Company's commander, Captain Aphael, fears they will soon be utterly overwhelmed by the Black Rage, and beyond the abilty to be controlled, unless death can claim them first.
- 1: White Dwarf 56 (2014), pg. 47