[Civilians running in the street during air raid siren, Bilbao, Spain]

[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]