M42.120 - Arrival of the 507th Mordian Iron Sentinels

The 507th Mordian Iron Sentinels, already stationed on Duros IV, take up defensive positions in the city of Fortress and other key urban centers. The regiment begins fortifying these locations, preparing for the inevitable assaults by the Vengeful Despoilers.
  Due to previous campaigns, the 507th has been reduced to a battalion-sized force and adopts cautious and calculated tactics to minimize further losses.