The Kailion sector, situated within the Expansion Region of the galaxy, housed a star system known as the Bovo Yagen system. Its central star was Bovo Yagen, and the planets and asteroid belt within the system derived their names from Bovo Yagen and his children. The exact number of inhabitants within the system was not firmly established, though a figure of approximately twelve million has been suggested.
Young Anakin Solo intervened to prevent the system's annihilation by Centerpoint Station during the events of the Starbuster Plot; it had been slated as the next target for destruction.