The Eradicator-class Heavy War Robot was an Ingzan war robot based on the ancient War Robots of the Xim Empire. During their travels of the Coruscant Galaxy, Ingzan military and technology experts found certain items, droids, ships etc they could copy and use in their own civilization. The Xim Empire's "Guardian Corps" war robot was an extremely outdated droid from the days before the Galactic Republic, which was outdated several millennia over by the time the Ingza and Bregaro heard about them.