Gas Gang Chloroform, Carbon Monoxide, and Carbon Dioxide. Whereas the Metal Men were approximately the same size as Doctor Magnus, the Gas Gang were anywhere from one-third to twice his size. On Chloroform's initial attack, it caused the Metal Men to break out in fits of hysteria ala Nitrous Oxide (Laughing Gas) which Doc Magnus said was chloroform's initial effect. Before Lead could wall them off, Mercury literally "broke up laughing", opening Oxygen to attack and causing the Metal Men to begin to rust. During the chase Carbon Monoxide (called "CM" by Carbon Dioxide) attempted to poison them with fumes, while Carbon
Chemical weapons in World War I chemical attack near the end of the 8-year Iran–Iraq War. The full conflict's use of such weaponry killed around 20,000 Iranian troops (and injured another 80,000), around a quarter of the number of deaths caused by chemical weapons during the First World War. All major combatants stockpiled chemical weapons during the Second World War, but the only reports of its use in the conflict were the Japanese use of relatively small amounts of mustard gas and lewisite in China, Italy's use of gas in Ethiopia (in what is more often considered to be the Second Italo-Ethiopian War), and very rare