Battle of Tumusla
1825 CE.
Shown on the map at -20.491°, -65.620°.
The Battle of Tumusla was the last battle between regular forces during the Bolivian War of Independence and one of the last encounters of the Spanish American wars of independence. This battle was fought on 1 April 1825, near the village of Tumusla (Potosí), in the current territory of Bolivia. It was a defeat for the Royalist forces under command of Pedro Antonio Olañeta, who was killed.
Text from the Wikipedia article Battle of Tumusla, licensed CC BY-SA 4.0.