Animated Stereoview of British Soldiers in a Trench Demonstrate Keeping Watch Over No Man's Land With a Mirror (1910s)

British soldiers keeping watch over the top of their trench with a mirror. Published by Keystone View Company.

Source: New York State Military Museum.

Highlanders Marching Through Boulogne

French civilians greeting soldiers of a Highlander regiment marching through Boulogne-sur-Mer, c. 1914. Animated stereoview.

Battle of Tel el-Ful Mass Grave

British soldiers pose next to a mass grave for Ottoman soldiers killed during the Battle of Tel el-Ful, near Jerusalem, Palestine, 1917. Today the area is known as Gibeah. Animated stereoview.

Source.