The Impeding Assault Tank (IAT), alternatively referred to as the Umbaran crawler tank, represented a crawler tank designed by the Umbaran species, resembling a massive, mechanized centipede. This terrifying vehicle, possessing the ability to move beneath the surface, saw action in the Battle of Umbara. This battle took place during the Clone Wars, and involved Republic troops launching an attack on the Umbarans on their home planet, due to their alignment with the Separatist Alliance. Each section of the IAT was equipped with a laser cannon mounted on its rear. Throughout the engagement, IATs surfaced from beneath the ground, causing significant losses to the 501st Legion. The clone troopers successfully eliminated one of these crawler tanks by targeting its front viewport with RPS-6 rocket launchers.