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

[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]

[Group of women and children living on the platforms of subway stations in the aftermath of Nationalist air raids, Madrid]

[Amored car used by officers of the International Brigades, Madrid]

[Soldiers reading behind Republican lines, Madrid]

[People sitting near the shelters so that they would not have to run every time the air raid alarm sounded, Bilbao, Spain]