The Battle of Bilbao, 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.

The Biscay Campaign was an offensive of the Spanish Civil War which lasted from 31 March to 1 July 1937. 50,000 men of the Eusko Gudarostea met 65,000 men of the insurgent forces. After heavy combats the Nationalist forces with a crushing material superiority managed to occupy the city of Bilbao and the Biscay province.