[Man fighting a fire ignited in a gasoline depot by a Nationalist air raid, Bilbao, Spain]

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

[Republican soldiers inside the Governor's Palace, the last major bastion of Nationalist resistance in this stategically located hilltop town, Teruel, Aragón front, Spain]

[Man carrying a wounded boy, Teruel, Aragón front, Spain]

[Farewell ceremony for the International Brigades, Les Masies, Spain]

[Farewell ceremony for the International Brigades, Les Masies, Spain]

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

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

[Republican soldiers listening to their commander give a speech, Rio Segre, Aragón front, near Fraga, Spain]

[Officers and commissars of the Marineros battalion look at the heights they must take, Rio Segre, Aragón front, near Fraga, Spain]

[Officer talking on a telephone at a field headquarters during the Republican offensive along the Rio Segre, Aragón front, Spain]

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

[Republican soldier, cigarette still in his mouth, is later among the seriously wounded, Rio Segre, Aragón front, near Fraga, Spain]

[Republicans installing anti-aircraft artillery, Rio Segre, Aragón front, near Fraga, Spain]

[Marineros in dust cloud, Rio Segre, Aragón front, near Fraga, Spain]

[Wounded being led away, Rio Segre, Aragón front, near Fraga, Spain]

[Marineros bringing in the wounded, Rio Segre, Aragón front, near Fraga, Spain]

[An aid station near the farmhouses in the first zone of fire, Rio Segre, Aragón front, near Fraga, Spain]

[Crowd watching an air battle over the city, Barcelona]

[Woman and dog running for shelter when the air-raid alarm sounded, Barcelona]

[Entertainment for children who were being evacuated from the city during the Nationalist bombings, Barcelona]

[Older woman preparing to evacuate the city, which was being bombed by Nationalist planes, Barcelona]

[Departure of women, children, and elderly from Barcelona]

[Refugee, whose husband and son were killed earlier in the war, waiting with her dog as she flees northward, Barcelona]