The Bombing of Durango took place on 31 March 1937, during the Spanish Civil War. On 31 March 1937 the Nationalists started their offensive against the Republican held province of Biscay. The same day the Legion Condor and the Aviazione Legionaria bombed the town of Durango. Around 250 civilians died, among them one priest and fourteen nuns. Durango was the first defenseless European city bombed. The Nationalists never acknowledged their guilt.