Battle of Cerro Muriano
1936 CE.
Shown on the map at 38.003°, -4.770°.
The Battle of Cerro Muriano took place during the Spanish Civil War in 1936. The battle is perhaps most known today for the famous photograph, The Falling Soldier, that Robert Capa took during it.
Text from the Wikipedia article Battle of Cerro Muriano, licensed CC BY-SA 4.0.