[Volunteer members of International Brigade sitting in a large barrel against a tree, a gun outside, Spain]

The Spanish civil war was the first conflict where urban civilian populations were targeted from the air, creating the need for air raid shelters. Island of Minorca

[Two children playing with a snake, San Domenico in Cocullo, Italy]

[A member of a police force and little girls dressed up, Milan, Italy]

[Unidentified Woman]

[Pierre Cot holding a speech during a meeting, Paris]

[Speaker at Writers' Congress in front of Ernst Thaelmann's poster, Paris]

[Political leaders at a memorial service in honor of the 1871 Paris Commune, Pere Lachaise Cemetary, Paris]