A propaganda film made during the Spanish Civil War in support of the Republican government against the rebellion by Gen. Francisco Franco's forces who were backed by Nazi Germany and Fascist Italy. The film would have been seen by those making it as a documentary.

• Contemporary Historians Inc.
• Manuel Azaña
• José Díaz
• Dolores Ibárruri
• Enrique Lister
• Commander Martinez de Aragón
• Gustav Regler
• Orson Welles
• Ernest Hemingway