[NorthMountain]

Yes, I did note the use of elemental chlorine as a chemical warfare agent. It was found to be too light, and not poisonous enough ... So the Powers went on to using Sulfur Mustard compounds, Lewisite (organo-arsenic compound), and a whole bunch of other organic compounds involving chlorine and sulfur or arsenic in the molecule. Generally, they were either severe irritants, or blister agents. Organo-phosphate nerve agents were developed later.

[jmacusa]

Still though, ever look down into a bottle of chlorine bleach? Swear to God the stuff looks like a kind of mustard color. My grandfather was lucky to have survived that crap. My grandfather would never talk to us kids about his tie in France. When he died my father(recently passed away) told us some of the horror he endured. Things like having to go out on night time prisoner snatches were they has to blacken their faces, wear balaclava hats, carry a bayonet, a club and a pistol. The pistol was a last resort so as not to give away your position.

My Dad said sometimes he'd have nightmares and my poor grandmother would get a beating. He got involved in working with poison gas because he thought he was volunteering for a detail that would get him out of the front lines. Little did he realize what he was in for.