Ernest Brooks, Battle of Broodseinde Ridge - troops moving up at eventide. Men of a Yorkshire regiment on the march, 1917.
Source: National Library of Scotland

Ernest Brooks, Battle of Broodseinde Ridge - troops moving up at eventide. Men of a Yorkshire regiment on the march, 1917.

Source: National Library of Scotland

English poet Rupert Brooke during World War I.
Source: Imperial War Museums

English poet Rupert Brooke during World War I.

Source: Imperial War Museums

George Charles Beresford, Wyndham Lewis, 1917.

George Charles Beresford, Wyndham Lewis, 1917.

Sergeant Stubby, the most decorated war dog of World War I and the only dog to be promoted to sergeant through combat, pictured wearing military uniform and decorations, 1918-1921.

Sergeant Stubby, the most decorated war dog of World War I and the only dog to be promoted to sergeant through combat, pictured wearing military uniform and decorations, 1918-1921.

W. E. Mason, Belgian dogs trained to draw quick-firing guns, 1915.

W. E. Mason, Belgian dogs trained to draw quick-firing guns, 1915.

Frank Hurley, Wounded men at the side of a road after the Battle of Menin Road, Passendale, Belgium, 1917.
Source: State Library of New South Wales

Frank Hurley, Wounded men at the side of a road after the Battle of Menin Road, Passendale, Belgium, 1917.

Source: State Library of New South Wales

Portrait of John Meintz, who was tarred and feathered during World War I for not supporting war bond drives, 1917 - 1918.
Source: National Archives and Records Administration

Portrait of John Meintz, who was tarred and feathered during World War I for not supporting war bond drives, 1917 - 1918.

Source: National Archives and Records Administration

Scuttling of the German Fleet at Scapa Flow, Scotland, 21 June 1919.
Source: Imperial War Museum

Scuttling of the German Fleet at Scapa Flow, Scotland, 21 June 1919.

Source: Imperial War Museum

American actress and screenwriter Ruth Gordon, 15 November 1919.
Source: George Grantham Bain Collection (Library of Congress)

American actress and screenwriter Ruth Gordon, 15 November 1919.

Source: George Grantham Bain Collection (Library of Congress)

British Expeditionary Force in Freetown, Sierra Leone during the West Africa Campaign, 1914–1916.
Source: Library of Congress

British Expeditionary Force in Freetown, Sierra Leone during the West Africa Campaign, 1914–1916.

Source: Library of Congress