The AT-AT (pronounced either casually as 'at at', or using only the letters ' A.T. Standing over 20 metres (66 ft) tall with blast-impervious armour plating, these massive constructs are used as much for psychological effect as they are for tactical advantage.
The All Terrain Armored Transport, or AT-AT walker, is a quadruped mechanized infantry combat vehicle used by the Imperial ground forces. Main article: Walker (Star Wars) § All Terrain Armored Transport (AT-AT) Vehicles appearing in the Original Trilogy All Terrain Armored Transport (AT-AT)
