AT-XT
developed by the Old Republic for used during the Clone Wars, the All-Terrain Experimental Transport walker was considered the predecessor to the modern AT-ST scout. They were developed as smaller counterparts to the AT-TE tank, for deployment into cramped battle arenas. However, because the designers at Rothana Heavy Engineering were continually revising its design, the AT-XT never saw full production. Many of its systems and design aspects were later reused in the development of the AT-ST walker. The basic AT-XT was to have been armed with a heavy laser cannon and a proton missile launcher.