The Southern Wastes existed on Uba IV, the Ubese's planet of origin, known as Ubese territory. It's thought that these desolate lands came into being following the bombardment of the Uba system, which left the planet ravaged.
Around the time of 3 ABY, various Ubese clans resided there; among them was Clan-Vorsazg, headed by the War-Master named Savax. With potential support from the Hutt, these clans operated a fleet of capital ships with the aim of attacking the yrak pootzck Ubese who lived in Ubertica. They successfully devastated numerous Ubertican urban centers before Imperial forces brought about their destruction.