AT-AT

Walkers are fictional vehicles from the Star Wars universe that traverse the landscape on mechanical legs. They are used by the Old Republic and the Galactic Empire for ground assault or transport. There are a variety of walkers: Star Wars Episode V: The Empire Strikes Back introduces the All Terrain Armored Transport (AT-AT) and All Terrain Scout Transport (AT-ST), while Star Wars Episode II: Attack of the Clones, Star Wars Episode III: Revenge of the Sith, and the Star Wars Expanded Universe feature numerous others. Walker variants have been merchandised and featured in popular culture.
See more at Wikipedia.org...