This got me thinking about it and realizing it’s kind of odd that Civilization lets you build atomic weapons but not chemical or biological weapons. Maybe it’s in Civ 4 or Civ 6; I haven’t really played either of those.
I remember Pawn Stars once had someone bring in a gas mask designed for infants from that same era, and after authenticating it Rick found the concept and need for something like that so horrific that he didn’t even make an offer.
I was curious about this. According to Wikipedia, the Allies had stockpiles of chemical weapons but war leaders were against using them first (except Churchill, apparently) out of fear of the civilian reaction should it become known that the Allies used them first. The Allied side had them in theater, however, and there was an incident in Bari, Italy where an accidental release of mustard gas occurred after an Axis attack, leading to a number of deaths from exposure to the gas. The UK government apparently didn't admit this until the mid-1980s.