[Republican soldiers lying on the ground aiming rifles, Santa Eulalia, Aragón front, Spain]

[Woman holding a child fleeing Nationalist bombings, near Cerro Muriano, Córdoba front, Spain]

[Woman holding a child fleeing Nationalist bombings, near Cerro Muriano, Córdoba front, Spain]

[Member of the International Brigades, Madrid]

[Republican soldier, Madrid]

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

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

[Building destroyed by Nationalist air raids, Madrid]