Soldier and dog with gas masks in the First World War
Anonymus: Equipt (sic) for the trenches, black-and-white photograph, ca. 1914–1918; source: Library of Congress Prints and Photographs Division, LC-USZ62-115014, public domain.
Anonymus: Equipt (sic) for the trenches, black-and-white photograph, ca. 1914–1918; source: Library of Congress Prints and Photographs Division, LC-USZ62-115014, public domain.