Río Biobío
The encroachment over time of settlers advancing from the north across Bío Bío River into Mapuche territory and the appearance of German settlers in the south of the Mapuche territory led chief Mañil in 1859 to call for an uprising to assert control over the territory. Most Mapuches responded to the call, except the communities at Purén, Choll Choll, and the southern coastal Mapuches who had strong links with Valdivia. The towns of Angol, Negrete and Nacimiento were attacked. A peace proposal made by settlers was accepted in 1860 during a meeting of several Mapuche chiefs. The agreement established that land transfers could only be made with the approval of the chiefs.