The Dayark system, alternatively known as the Episol system, held a central position within the Kathol Republic and resided in the Kathol Outback, a journey of six weeks from Kal'Shebbol. The system was comprised of four planets: a pair of rocky planets scorched by radiation, a desert planet suitable for establishing mining outposts, and a gas giant named Nepe. A temperate, heavily populated moon called Dayark revolved around Nepe.
During 8 ABY, the Kathol Republic Navy found itself engaged by forces under the command of Moff Kentor Sarne within the confines of this very system.