[Republican soldier looking out from behind a stone wall, Río Segre, Aragón front, near Fraga, Spain]

[Soldier talking on phone while reading a map next to comrade, Rio Segre, Aragón front, near Fraga, Spain]

[Remains of bridge bombed by Nationalist rebels in an attempt to trap the Republicans, Rio Segre, Aragon front, near Fraga, Spain]

[Republican soldier reading a map with a comrade while talking on the phone, Rio Segre, Aragón Front, near Fraga, Spain]

[Republican soldier looking out from behind a stone wall, Rio Segre, Aragón front, near Fraga, Spain]

[Clown entertaining children, Barcelona]

[People watching planes, Barcelona]

[Civilians watching an air raid, Barcelona]

[Men and women look up during air raid, Barcelona]

[Clown entertaining children, Barcelona]

[Crowd of children being entertained by a clown during air raid, Barcelona]

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

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

[Spanish Republic Prime Minister Juan Negrín and General Vicente Rojo Lluch, farewell parade for the International Brigades, Barcelona, Spain]

[Facade of a small building that used to be a cafe, with sandbags in the windows and Franco slogan, Rio Segre, Aragón Front, near Fraga, Spain]

[American Abraham Lincoln Brigade, led by Milton Wolff (center), during the final review of the International Brigades, near Falset, Spain]

[Clown entertaining children, Barcelona]

[Clown entertaining children, Barcelona]

[Clown entertaining children, Barcelona]

[Clown entertaining children, Barcelona]

[Clown entertaining refugee children, Barcelona]

[Refugee children watching a show, Barcelona]

[Men and women looking up during air raid, Barcelona]

[American Abraham Lincoln Brigade, led by Milton Wolff (center, without cap), at the farewell ceremony for the International Brigades, near Falset, Spain]