Why chemical weapons deserve their Big No-No place
Punkey explains why chemical weapons actually are worse than nuclear or biological weapons.
[T]he big reason for it being on the No-No List is that chemical weapons are essentially useless against a real military force, and are only really good at killing and terrorizing civilians. Unlike white phosphorus, chemical weapons do absolutely no damage to structures or materiel, they only kill people. Even the most lethal nerve agents are stopped by standard-issue chemical protection ...which is great if you have those things, and most modern militaries do.... Chemical weapons are spectacularly effective against people that aren't prepared and can't easily leave the target area - which pretty much only describes civilians.