 During their attempts at conquest in 1460 and again in 1491, the Incas established forts in the Central Valley of Chile, but they could not colonize the region.The Mapuche fought against the Sapa Tupac Inca Yupanqui (c. 1471–1493) and his army.The result of the bloody three-day confrontation known as the Battle of the Maule was that the Inca conquest of the territories of Chile ended at the Maule river, which subsequently became the boundary between the Incan empire and the Mapuche lands until the arrival of the Spaniards.