Battle of Bilbao
1937 CE.
Shown on the map at 43.250°, -2.917°.
The Battle of Bilbao (Spanish: Batalla de Bilbao, Basque: Bilboko gudua), part of the War in the North in the Spanish Civil War, saw the Nationalist Army capture Bilbao and the rest of the Basque Country that was still being held by the Spanish Republic.
Text from the Wikipedia article Battle of Bilbao, licensed CC BY-SA 4.0.