Spanish Civil War
Around half-a-million people died in the war, and many atrocities were committed by both sides. The most famous atrocity was the bombing of Guernica. On 26 April 1937, the city was bombed by Legion Condor, a Nazi military unit working for Franco. It was the first time that an air bombing caused so many civilian casualties. The bombing was reported all over the world in newspapers and made people aware of the German involvement.