planes bombed military objectives in Durango, and later communists and socialists locked up the priests and nuns, shooting without pity and burning the churches". The bombing of Durango was to a certain extent overlooked historically. Instead, it was the bombing of Guernica, a similar air attack that took place four weeks later, that came to symbolize the horrors of modern aerial warfare in the public consciousness. See also Aviazione Legionaria Condor Legion List of aircraft of the Spanish Republican Air Force References Notes Explosions in 1937 Mass murder in 1937 Battles of the Spanish Civil War 1937 in Spain Conflicts in 1937 Spanish Civil War massacres Biscay Basque history Airstrikes during the Spanish Civil War March 1937 events Airstrikes conducted by Italy