Changes

Assigned to the [[933rd Expeditionary Fleet]], he was not among those of his brothers who suffered betrayal at the [[Battle of Calth]]. After learning of the treachery, Roscius gathered forces and launched a guerrilla war against traitor forces. He captured the [[Sons of Horus]] [[Strike Cruiser]] ''at [[Plutol]]'' a [[Segmentum]] away from [[Ultramar]], and 6 weeks later used it to cripple a [[Death Guard]] [[Heavy Transport]] at [[Terrax]]. He also struck at a [[Dark Mechanicum]] refueling station at [[Yspouta]].

Eventually, Roscius and led a ragged flotilla of vessels against Traitor supply lines at [[Toreus]], 3,000 light years away, where his forces of resistance grew to 3,000 [[Astartes]] drawn from four different (unnamed) [[Space Marine Legion|Legions]]. The last known engagement he was engaged in was the Duthovan Blockade, where he sought to isolate traitor forces stranded on [[Duthovan]] by the [[Ruinstorm]]. Few on either side survived the battle.{{Fn|1}}