The new streamlined gas mask, which some troops tried on for the ... in hot climates where soldiers may be naked to the waist. Contact us at letters@time.com ...

Narrator: These Army infantry recruits are being exposed to CS gas, more commonly known as tear gas to experience its effects and to learn how to properly use a gas mask. Here at the Maneuver ...

In 1914 a chemist called Fritz Haber offered his knowledge to the German Army. He soon began experimenting with chlorine gas ...