Río Biobío
In the years following the Battle of Curalaba a general uprising developed among the Mapuches and Huilliches. The Spanish cities of Angol, La Imperial, Osorno, Santa Cruz de Oñez, Valdivia and Villarrica were either destroyed or abandoned. Only Chillán and Concepción resisted the Mapuche sieges and attacks. With the exception of Chiloé Archipelago all the Chilean territory south of Bío Bío River became free of Spanish rule.