First off, we've had sworn testimony from soldiers and testimony before our staff that wasn't sworn, that said these alarms rarely went off, that they went off after the war in most cases and went off a lot. ↗
What we know from World War I is that some of our troops had acute symptoms of exposure to chemicals, had bad health and died because of chemical exposure in World War I. ↗
I'm not so interested any more in how a great deal of science fiction goes. It goes into things like Star Wars and Star Trek which all go excellent in their own way. ↗
When I was growing up, it was 'Communists'. Now it's 'Terrorists'. So you always have to have somebody to fight and be afraid of, so the war machine can build more bombs, guns, and bullets and everything. ↗