Battle of Chalchuapa
1885 CE.
Shown on the map at 13.983°, -89.683°.
The Battle of Chalchuapa (Spanish: Batalla de Chalchuapa) was a battle between the military forces of El Salvador and Guatemala from 1–2 April 1885. Guatemalan President Justo Rufino Barrios was killed during the battle.
Text from the Wikipedia article Battle of Chalchuapa, licensed CC BY-SA 4.0.