In all, more than 500,000 tons of chemical gas agents were used in World War I. Some 500,000 troops were injured and some 30,000 died, including 2,000 American troops.

German soldiers at a remove from the front and the German general public at home were well aware of the horrors prevailing in France when the British and French launched a joint offensive along the ...

(See how World War I energized mapmaking at National Geographic.) Photographed in 1917, an endless line of Russian soldiers sit patiently in a trench as they anticipate a German attack. National ...

1908 — and the body was identified as a German soldier from World War I, researchers said, confirmed by the discovery of his identification plate. Since the man was identified, his remains were ...