Much of the action in Star Wars occurs deep in space among asteroids, the debris of lost ships, and incredible celestial horizons. Some of the greatest battles in the Star Wars universe occur planetside, however. During the Galactic Civil War, the Empire invested heavily on powerful ground vehicles and highly trained troops to suppress dissident voices and maintain their authoritarian control. Some of these vehicles, with their unforgettable designs, have become cultural icons.  All-Terrain Scout Transport: AT-ST The AT-ST Walker…