A droid battalion participated in the defense of the Separatist stronghold on Desix, specifically the Desix Separatist holdout within Desix City. This battalion had a minimum of twenty B1-series battle droids, one OOM command battle droid, and was under the command of a T-series tactical droid who answered to Governor Tawni Ames. The battalion also featured a dedicated anti-air unit, at least a single Armored Assault Tank Mk I, support from a dozen BX-series droid commandos, and several droidekas protecting the bell tower inside the city.