PHOSGENE • DICCIONARIO INGLES.COM • Definition of Phosgene

... seemed to be choking. My strength was entirely gone, and I was about as miserable as one could be. I could not utter a sound and any attempt to speak only increased my pain. I relate these facts about the agony that I suffered simply to show what a terrible weapon of war this deadly phosgene gas is, and to emphasize the villainy of the Hun government in using it after having agreed with other nations years before ...

— In the Flash Ranging Service - Observations of an American Soldier During His Service - With the A.E.F. in France • Edward Alva Trueblood