A United States Army training film about defense against chemical warfare during World War I. The "Collective Protector" enables a general and the staff to work on their maps and orders without gas masks at the Division Headquarters. Two soldiers outside the headquarters wearing gas masks. They guard a low entrance doorway and enclosed tunnel with a heavy, flexible door designed to keep out gas. A soldier lifts the flap of the door and enters. Officers converse with each other while looking at a map on a wall. Soldier stands by rotating a handle on a device continuously. It has a long wide pipe connected to it, perhaps managing fresh air intake or air exchange. U.S. soldiers wearing gas masks load ammunition onto trucks. "Enemy" aircraft flies overhead throwing a cloud of poisonous gas that quickly envelops the area. A soldier wearing a gas mask fires his rifle into the air at the aircraft, through the heavy smoke screen. Gas sentries neutralize the gas around a dump. They dig in the ground with pick axes and mattocks, and then spread a white powder over the area. They then cover the area with a thin layer of the dirt they had dug up.
A United States Army training film about defense against chemical warfare in World War I. Dramatization of a division chemical officer going over chemical warfare situation with the chemical officer from a new division. The officers seated inside a tent exchange notes. Gas casualties are taken out of ambulances. Disciplined soldiers return to rest areas at the Division Headquarters. A soldier removes his mask and goes to sleep.
A United States Army chemical warfare service training exercise underway. A United States soldier fires a McBride gas gun. Smoke candles burn in a field with smoke surrounding the area.
From a United States Army training film describing techniques of the chemical warfare service. United States troops advance behind successive smokescreens made with phosphorous hand grenades. An explosion with smoke rising in the surrounding area.
A United States Army training film about chemical warfare. United States soldiers fire artillery with 75mm shells to achieve a smokescreen. Explosions on the ground with smoke surrounding the area. The soldiers load and fire artillery.
A United States Army training film about chemical warfare and the Chemical Warfare Service. United States soldiers install Livens gas projectors (delivering smoke) directed towards mock enemy in trenches. Explosions on the ground with smoke spreading in the surrounding area.
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