[Republican soldiers shooting out windows, University City, Madrid]

[Soldier in the Ernst Thaelmann Brigade fighting for the Republic, Madrid, Spain]

[Group of men and boys watching Nationalist air raid, Madrid]

[Soldier of the International Brigade and woman pumping water together, Madrid]

[Women assembling cartridge belts for Republican soldiers in munitions factory, Madrid]

[Member of the International Brigades behind a barricade, in or around University City, Madrid]

[Refugees from the Nationalist air raids preparing to leave the city, Madrid]

[Man in front of a sign saying "succumb or expire but wil be defeated," Madrid]