[Downed German plane on display in Passeig de Gracia, Barcelona]

[Downed German plane on display in Passeig de Gracia, Barcelona]

[Downed German plane on display in Passeig de Gracia, Barcelona]

[Refugee transit center, Barcelona]

[Refugee transit center, Barcelona]

[Refugee transit center, Barcelona]

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

[Refugees from Barcelona along the road to the French border]

[Journalists (Herbert Matthews, far left, and O'Dowd Gallagher, far right), Barcelona]

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

[Refugees on the road from Barcelona to the French border]

[Refugees on the road from Barcelona to the French border]

[Refugees on the road from Barcelona to the French border]

[People riding on swings at the annual April fair, Seville]

[Men and women piled on top of a car, Madrid]

[Militiamen defending a bridge, near Barcelona]

[Republican militiawoman, Barcelona]

[Troop train departing for the front, Barcelona]

[Training militiamen, Barcelona]

[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]

[Members of the International Brigades defending a building in the University City, Madrid]

[Men of the International Brigades aiming gun out the window in a laboratory of the Medical School building of the University City, Madrid]

[Men of the International Brigades engaged in house-to-house fighting around the slaughterhouses near the University City, Madrid]