The Parliament of Quillín (Killen) was a diplomatic meeting held in 1641 between various Mapuche groups and Spanish authorities held in the fields of . With the ensuing treaty the Spanish sought an end to the hostilities of the Arauco War in order to concentrate the empire's resources in fighting the Catalans in Europe. This way the Mapuche obtained a peace treaty and a recognition on behalf of the crown in a case unique for any indigenous group in the Americas. Another contributing factor for parties to wanting to end warfare may have been the 1640 eruption of Llaima volcano in the middle of the conflict zone. Possibly Mapuches interpreted the eruption as a signal sent from the pillanes.