Battle of Santander
1937 CE.
Shown on the map at 43.450°, -3.800°.
The Battle of Santander was fought in the War in the North campaign of the Spanish Civil War during the summer of 1937 and saw the victory of Italian and Nationalist forces against the Republicans. Santander's fall on 26 August assured the Nationalist conquest of the province of Santander, now Cantabria. The battle devastated the Republic's "Army of the North"; 60,000 soldiers were captured, among them the Basque forces which surrendered to the Italians on August 25.
Text from the Wikipedia article Battle of Santander, licensed CC BY-SA 4.0.