The mortar tank, also known as the Heavy Artillery Gun, was a piece of ex-Confederate droid weaponry acquired by the Yanibar Guard from an abandoned Separatist supply base. The venerable artillery weapons had seen action in the Battle of Naboo and then in numerous battles in the Clone Wars under the Trade Federation and Confederacy. Early in the history of the Yanibar Guard Army, the mortar tank provided the bulk of its artillery firepower. Although aging—having been built over twenty years ago—the weapons were reliable, simplistic, and most importantly, numerous. It was fairly simple for Kraechar Arms to add a networking module that allowed large formations of mortar tanks to focus their fire. Eventually, the droid design was copied and reproduced by Kraechar Arms as an indigenous product