This caused alarm among the Huilliche of the Llanos de Osorno (flatlands of Osorno) who decided to ally with the Huilliche Aillarehues of the Río Bueno valley and those around Lake Ranco to the north and ask for the intervention of the Governor of Valdivia, Mariano Pusterla.
The Boroanos, Borogas o Boroganos (also spelled with v) where a group of Mapuches native to the aillarehue of Boroa in Araucanía that got involved in several conflicts in the northern Patagonian pampas supporting figures such as José Miguel Carrera, the Pincheira brothers and Manuel Rosas.