[Members of the International Brigades defending a building in the University City, Madrid]

[Men of the International Brigades aiming gun out the window in a laboratory of the Medical School building of the University City, Madrid]

[Men of the International Brigades engaged in house-to-house fighting around the slaughterhouses near the University City, Madrid]

[Men of the International Brigades catapulting grenades in the vicinity of the slaughterhouses near the University City, Madrid]

[Republican soldiers, trenches, University City, Madrid]

[Soldiers in Republican bunkers around the Clinical Hospital, one of the principal bastions of the Nationalist rebels in the University City, Madrid]

[Woman standing amid rubble of buildings destroyed by Nationalist air raids, Madrid]

[People living on the platforms of subway stations in the aftermath of Nationalist air raids, Madrid]

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

[Three children outside bullet-riddled building following an air raid, 10 Peironcely Street, Madrid]

[Members of the International Brigades and the other Spanish Republican forces, Madrid]

[Group of Republican soldiers at rest, Madrid]

[Spectators at the farewell parade for the disbanded International Brigades, Barcelona]

[Crowd watching an air battle over the city, Barcelona]

[Children with a downed Nationalist plane on display in a city park, Barcelona]

[Woman and child evacuating the city, which was being bombed by Nationalist planes, Barcelona]

[Woman and child at the refugee transit center, Barcelona]

[Girl on a cart evacuating the city, which was being bombed heavily by Nationalist planes, Barcelona]

[Group of men riding in a truck, on the road from Barcelona to the French border]

[Group of people at the French border, north of Barcelona]

[Republican soldiers firing machine guns, University City, Madrid]

Anti-clerical vandalism, burning contents of church, Madrid

[Republic militiawomen training on the beach, outside Barcelona]

[Air raid victim in hospital, Valencia]