The Sith Empire was established by the Sith of Korriban circa 28,000 BBY after Adas had unified his people with conquest. Three hundred years later, King Adas died following the defeat of the Rakata invaders, and the Empire collapsed. After the king's defeat, the Empire became torn by internal wars, and many warlords claimed kingship for themselves. The Empire was shortly reunified at some point before 6,900 BBY, with the rise of King Hakagram Graush which was deemed a proper successor. However, this renewal of the Sith Empire did not last long, as it ended with the arrival of the Dark Jedi Exiles following the Battle of Corbos. The sith empire was restored during the period of the Old Republic and was back to its original state and power.