Wounds and mustard gas could not stop Medal of Honor recipient Lt. Orlando Petty in 1918, but they may have caught up with him in 1932.

The first gas masks were made by the British. Gas attack alarms were put in trenches. An empty large-caliber shell casing was used for a bell or gong, but it couldn’t be heard in the back trench.

On June 2, 1918, during Germany's spring offensive offensive on the Western Front, a French unit pulling back to more defensible ground encountered a newly arrived company of Marines marching ...