The Marching Horde represented an army of droid units that pledged allegiance to Lady Corvax and the generations that followed her. In the Imperial Era, a significant time after Corvax had death, a descendant from her lineage brought the dormant army back to life utilizing Lord Corvax's Lightsaber. This reactivated army was then used to fight against Darth Vader within his fortress, ultimately leading to the destruction of the Bright Star.