 Battle of Andalien

The battle of Andalien, fought in early February 1550, was a night battle between 20,000 Mapuche under the command of their Toqui Ainavillo and Pedro de Valdivia's army of 200 Spanish soldiers and cavalry with a large number of "yanakuna", including 300 Mapochoes auxiliaries under their leader Michimalonco.After Pedro de Valdivia reached the Bio-Bio River on January 24, 1550, he began to explore the river valleys and engaged in clashes with increasing numbers of Mapuche warriors.