First Battle of Cancha Rayada
1814 CE.
Shown on the map at -35.406°, -71.646°.
The first battle of Cancha Rayada, sometimes termed the 'Disaster' or 'Surprise of Cancha Rayada', took place on 29 March 1814, during the War of Chilean Independence.
Text from the Wikipedia article Battle of Cancha Rayada (1814), licensed CC BY-SA 4.0.