o circa M41 - the regiment participated in the Defence of the Imperial City of Vogen. Elements of the regiment under the command of Captain Fane faced renegade chaos space marines. At one point the Keystone of the position was mis-deployed when the Night Lord sorcerer, Asuramandos used warp majics to re-direct the defenders. The position was overrun in the ensuing battle.
o During the Defence of Vogen City at least one Leman Russ Executioner fought as the fourth tank of second squadron of the second company.