Darth Vader rules the Galactic Empire with an iron fist, even going as far as to force choke those who don't live up to Vader's expectations. But, when it comes to walking the All Terrain Armored Transports, Vader doesn't trust anyone to get the job done correctly, so he does it himself. The All Terrain Armored Transport, or AT-AT walker, is a four-legged transport and combat vehicle used by the Imperial ground forces. These vehicles were used to battle the Rebel Alliance on the frozen planet Hoth. Everyone will immediately know that you feel the power of the Dark Side when you wear this Darth Vader AT-AT Walker Star Wars T-Shirt!