[Men of the semi-Trotskyist POUM (Partido Obrero de Unificación Marxista) militia, Leciñena, Aragón front, Spain]

[Officer speaking to a group of Republican soldiers before an attack, Córdoba front, Spain]

[Loyalist militiamen landing across a gully, Córdoba front, Spain]

[Woman holding baby, man, and young girl along train track fleeing Nationalist bombings, near Cerro Muriano, Córdoba front, Spain]

[Woman and children fleeing the town, which had been bombed by Nationalist planes, near Cerro Muriano, Córdoba front, Spain]

[Republican soldier amid rubble, Spain]

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

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