Ziost, also referred to as the "Gateway to the Empire", was a world made up of ancient dark forests and barren tundra. However, over the years, the trees withered away, and the planet became similar, in landscape, to Korriban. It was not only a focal point of the dark side of the Force, but it was also the adopted homeworld of the Sith species, and also the capital of the Old Sith Empire. After the end of the Great Hyperspace War, Ziost would be forgotten, only to be rediscovered by Revan's Sith Empire.