Finished with Ethiopia, Fascism puts Italy in another conflict, and the Italian Royal Air Force, with the insignia of the Legionnaire Air Force, immediately takes the lead. In July 1936, several SIAI S.81 transport from Morocco to Spain the troops General Franco needs to feed the revolt against the legitimate Republic. About 800 aircraft (fighters, bombers, reconnaissance planes, etc.) and 5,700 Italian legionaries (pilots, technicians, experts) successfully support the ground forces, ‘duelling’ with the enemy and regrettably carrying out ‘terrorist bombings’ against Valencia, Barcelona (600-1,300 dead) and Guernica. But the war in Spain is the ‘swan song’ of the Italian Royal Air Force that is outclassed from 1939 onwards by the more powerful German, British, Russian and American aircraft