Chemical Warfare Service - Drills With Clouds of Smoke- United States - Remarkable photo of National Army men facing gas attack--in training camp

Chemical Warfare Service - Drills- Schools - Remarkable photo of National Army men facing gas attack in training camp

Chemical Warfare Service - Drills - Masks - This picture illustrates the respiratory drill which is held behind the British lines every time a company leaves for the trenches. The proper use and adjustment is demonstrated in this drill as its purpose is to prevent suffering in the enemy's gas attack

Drills - Infantry - Camp Funston, Fort Riley, Kansas. Machine gunners in gas masks. This photograph was taken to be used by the Liberty Loan Publicity Committee

Medical Department - Influenza Epidemic 1918 - Influenza masks worn by soldiers in camp. Soldiers at Fort Thomas, Kentucky, wearing the influenza masks. The fort was quarantined during the worst days of the epidemic

Picture posed in France, near front line trenches, by Major Evarts Tracey, Engineer Corps, U.S.A., to illustrate effects of phosgene gas., 1918

Drills - Infantry - Bayonet Assault - Camp Funston, Fort Riley, Kansas. Infantrymen in action. This photograph was taken to be used by the Liberty Loan Publicity Committee

Drills - Infantry - Small Arms Practice - Targets - Tank corps men train on historical ground at Gettysburg. Photo shows the men advancing in a sham battle

Western front. Motion picture camera man with a gas mask just before a gas attack. September 1917