Hostiles - The Traitor Guard
Traitor Guard is a term given to the vast majority of disloyal mortals who have left the Imperial Guard in order to fight for Chaos. They are not a single coherent force, but rather a faction of the infinite collection of warbands and hosts under the leadership of Chaos Champions and part of the The Lost and the Damned. Often these mortal guardsmen will fight alongside mutants or Daemons of the warp by summoning them by way of blasphemous rituals.