[Republican soldier combing his hair and looking into a hand-held mirror, Battle of Brunete, Spain]

[Loyalist militiamen jumping over a gully carrying rifles, near Espejo, Córdoba front, Spain]

[Refugees in train windows, police officer in foreground, Spain-France border, near Cerbère, France]

[Loyalist militiamen jumping over a gully carrying rifles, near Espejo, Córdoba front, Spain]

[Republican Basque soldiers talking with monk at the cloister sheltering them, Amorebieta, Basque region, Spain]

[Republican soldiers preparing a telephone wire, Río Segre, Aragón front, near Fraga, Spain]

[Republican soldiers firing machine guns, Rio Segre, Aragón front, near Fraga, Spain]

[Loyalist officer standing on a barrel giving a pep talk to loyalist soldiers, Andalusian 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]

[Republican soldiers during the battle for this strategically located hilltop town, Teruel, Aragón front, Spain]

[Republican soldiers taking notes in a ditch, Rio Segre, Aragón Front, near Fraga, Spain]

[Andre Malraux and Ilja Ehrenburg at the Second International Congress of Writers for the Defense of Culture, Valencia, Spain]

[First Nationalist air bombs of the day, Río Segre, Aragón front, near Fraga, Spain]

[Soldiers sitting around table with a young woman, Farewell of the International Brigade, near Falset, Spain]

[Woman, man and two children sitting in front of sandbaged structure against a hill, Bilbao, Spain]

[Republican soldier taking notes next to a wounded comrade, Rio Segre, Aragón Front, Spain]

[Republican soldiers working on damaged bridge, Rio Segre, Aragon front, near Fraga, Spain]

[Republican soldier with rifle on destroyed bridge, Rio Segre, Aragon front, near Fraga, Spain]

[Republican soldiers walking down road, Rio Segre, Aragon front, near Fraga, Spain]

[Republican soldiers sweeping the hospital courtyard for the International Brigades farewell ceremony, Les Masies, Spain]

[Republican soldier leaning against tree looking after wounded soldier, Mount Sollube, Spain]

[Republican soldier leaning against tree looking after wounded soldier, Mount Sollube, Spain]

[Soldiers walking on a hill, preparing for attack, Rio Segre, Aragón Front, near Fraga, Spain]