 Following the great rising of the Moluche and Huilliche after the Battle of Curalaba in 1598 during the Arauco War, the Spanish were expelled from south of the Bío-Bío River.After many decades of further warfare, the bounds of Araucania were recognized by the Spanish as being between the Bío-Bío River and Toltén River.This old region of Araucanía now is divided between the southern part of the Bío-Bío Region and the Araucanía Region, in southern Chile.