In all, more than 500,000 tons of chemical gas agents were used in World War I. Some 500,000 troops were injured and some 30,000 died, including 2,000 American troops.

From the Azovstal steel plant in Mariupol to the trenches of Pokrovsk, Moscow has turned to poison gas and riot control agents, violating international law and the Chemical Weapons Convention. A ...

His extensive and thorough bibliography reflects that. As the title implies, the author spends much time on the use of poison gas in the war and the first chapter discusses the entire "problem" of ...