The Impeding Assault Tank (IAT), also known as the Umbaran crawler tank, was a crawler tank created by the Umbaran people that looked like a giant mechanical centipede. It was used during the Battle of Umbara, a conflict that occurred during the Clone Wars when Republic forces attacked Umbarans on their home planet who had sided with the Separatist Alliance.The IAT had a laser canon on the back of each segment. During the Battle of Umbara, the IATs emerged from the ground and inflicted heavy casualties to the members of the 501st. The clones destroyed the crawlers with rocket launchers to the front view port.