Spanish civil war poster

"What are you doing to prevent this?" Written in French with a German translation at the bottom. This was an appeal to those supporting the republican i.e. communist cause versus the fascist cause led by Franco.  The former was supported by Stalin, the latter by Hitler and Mussolini; the war gave Hitler the opportunity to practice the aerial bombardment techniques which characterised his Blitzkrieg. The Spanish Civil War ended five months before WW2 began; unlike Mussolini, Franco wisely stayed out of it and was Spain's dictator until 1975.