Tetsubal was a city located in the area of the Ragnos Lakes, on the continent Keshtah Minor of the remote planet Kesh. Located to the south of the planet's capital, Tahv, by 4985 BBY Tetsubal had a population of 18,000 Keshiri natives. Tetsubal was one of eight villages around the Ragnos Lakes, and in 4,985 BBY the inhabitants of the region began to harvest a type of fluorescent algae from those waters. Hoping to find a use for the algae, Yaru Korsin, leader of the Lost Tribe of Sith—comprising several hundred Humans and Pureblood Sith—that had taken power in Kesh fifteen years earlier, ordered an expedition to Tetsubal and the surrounding areas to investigate. The mission was headed by Ravilan Wroth, who had his own agenda—hoping to get Sith leadership to focus on finding a way off Kesh,