Carus Brom is an Imperial Colonel tasked with overseeing the 37th Tartarus Planetary Defense Force Regiment, or PDF. Brom accepts commands from Gabriel with little hesitation, having a deep respect for the commander; however the mere presence of Toth is enough to make the veteran Colonel break out in hives. It is believed Brom escapes off-planet with his remaining troops during the later missions in Dawn of War's single-player campaign.
In the events of the novelized version of Dawn of War by C.S. Goto, Colonel Brom instead turned to Chaos and attacked Captain Gabriel Angelos during his attack/push to the summit where the Maledictum was located. According to the novel, Colonel Brom was not satisfied being put down on occasion by Gabriel's orders, resulting in Chaos finding its way into his heart. Colonel Brom was nevertheless killed along with the corrupted PDF and Imperial Guard who had turned traitor. Only a handful of Loyal Imperial Guards survived and joined up with the Forces of Order (Space Marines and Eldar) in the battle to the Summit.
Brom was armed with a Power Sword and Bolt Pistol. He was able to use the "Rally Squad" ability that Space Marine Sergeants were equipped with.