US "CHEMICAL WARFARE AGENTS" POSTER.

US "CHEMICAL WARFARE AGENTS" POSTER.
Reference and Training Chart. Reproduced by 956th Engr. Top. Co[mpany]: C. 1942.
Small five-color printed poster, 315 x 430 mm, discussing the various chemical agents available, their effects, uses and field neutralization. Old folds, margins slightly soiled; together with a pocket size reduction of the same poster labelled "Chemical Warfare Set, Edgwood Arsenal," and a pocket sized Chemical Warfare Pocket Reference Card, Air Service Command, September 1942, with similar instructions as to protection and effects.

These three C.1942-1944 posters and pocket cards give a clear picture for what to do if a force came under attack from regular Chemical weapons. Information like this would have been circulated quietly to US commanders around the world.
The use of Chemical Weapons had been "banned" in Europe between the Allies and Germany as both sides knew it was a step too far, and both sides had stockpiled chemical weapons as a deterrent, should the other side break the treaty. Britain said that it would have used chemical weapons on German cities if it had been invaded in 1940, and there was an incident in Bari, Italy in 1943, when an American ship was bombed while carrying mustard gas, causing extensive deaths. Japan was known to have used chemical weapons in the Pacific.
The Edgewood Arsenal was set up by the newly formed Chemical Warfare Service in May 1918 in Maryland, to carry out research on mustard gas.