Armored Assault Tank (Earth-2356)

The Armored Assault Tank, also known as the AAT battle tank or the AAT-1 Hover Tank, was a tank vehicle used by the Trade Federation and later donated to the Confederacy of Independent Systems where it served as one of its backbone infantry defenses and backbone vehicles during the Clone Wars. Many of the AATs used by the Confederacy were painted in Confederate colors, such as blue, however there were still tanks used by the CIS in the previous tan used by the Trade Federation. The tanks were also donated to Death Watch during their alliance with the Confederacy.

After the Clone Wars, dozens of AATs fell into the hands of the Alliance to Restore the Republic where they were modified extensively in order to better accommodate organic crews.

One of the most famous variants of the vehicle was done by Confederate General Lok Durd. He modified one of these into the Defoliator Deployment Tank. He attempted to test the vehicle on Maridun and the Lurmen there. However his prototype was destroyed by Anakin Skywalker and several others. This variant of the tank was later used by the Supreme Commander of the Droid Army, General Grievous, on Dathomir.

The tank was controlled by the pilot and the main cannon of the turret was controlled by the commander of the tank, which could sometimes be an OOM command battle droid, tactical droid, or even an organic in command of forces.

The AAT's main weapon was a heavy laser cannon capable of obliterating Republic AT-TE walkers. The cannon was used alongside the two light laser cannons on each side of the tank.

Source

 * https://starwars.fandom.com/wiki/Armored_Assault_Tank