Battle of Quiapo
1558 CE.
Shown on the map at -37.440°, -73.586°.
Battle of Quiapo in the Arauco War was the final battle in the campaign of García Hurtado de Mendoza against the Mapuche under the toqui known as Lemucaguin or Caupolicán the younger. It was fought in Quiapo, in the region nowadays known as Arauco Province, Chile on December 13, 1558. The importance of this battle was the first time that the Mapuche fought using a squad that carried firearms.
Text from the Wikipedia article Battle of Quiapo, licensed CC BY-SA 4.0.