World War One: three prisoners crouch at the feet of a fourth man who incites them to action. Halftone after a crayon drawing by L. Raemaekers.

Licence: Public Domain Mark

Credit: World War One: three prisoners crouch at the feet of a fourth man who incites them to action. Halftone after a crayon drawing by L. Raemaekers. Wellcome Collection. Source: Wellcome Collection.