A Legion Delegatus is a bygone officer rank of the Space Marine Legions used during the Great Crusade and Horus Heresy eras in the late 30th and early 31st Millennia. A mid-ranking Legion officer, such as a Centurion, was often granted this rank and tasked with specific missions by Legion high command and formally dispatched to act in all matters with the full weight of their commander's authority. As such, they could mobilise the Legion's resources to the full, deploy it's assets and, if performing a mission of vital strategic worth, assemble a strike force of chosen warriors.