back to Topic:
If i'm right was a big point that no one used C-weapons because every countries had enough of them to completely destroy the enemy. I had some lessons about this at my Military Service at the CBRN-Defense.
as example Britain feard the possibility of a extensive chemical attack on souther/mid England, including London.
The USA also feared japanese C-attacks, there was one example with balloons, but the japs just load them with conventional ammo.
Same at the Axis.
If you Argument only the fact that nobody used it is not a cause to not implement something - okay, but the engine (imho) don't Support this Kind of weapon. IF C-weapons are implemented, the possibility of a total C-warfare (which ends imho like an global nuclear war) should at least exist. Means the death of all (local) Population, maybe influences to the nature and permanent contaminated Areas. (VX - discovered in 1955 (time of very late DH) acts over weeks and months)
If you just use them "tactical" it is enough to made a C-artillery Brigade with very high softattack-Bonus. I had some times ago a concept for this (based on Events), but the outcome is not worth the work.
After all I think also A-weapons are bad implemented to DH or HoI in General. The aftermath is totally under-represented. (local) Chaos, nuclear winter, total Transformation to wasteland (up to 10kMT Bombs), the collapse of the state/System, nothing is really included.
And yeah, of course no one want this Scenario, but what if I let the cold war escalate? What if I play a crazy dictator of a small Country and rush nuke-tech? Atm I can fire in every province of (as example) Germany an nuke, all what follows is very low IC/TK 'cause the manufactures/streets are destroyed, some divisions are hardly damaged too. Which is not a large-scale nuclear attack equitable.
just my opinion, personal I would like the implementation of the possibility of a nuclear apocalypse, just to see how much of my Nation will survive and Play a bit fallout without the fallout mod or just for a real cold war Feeling of Paranoia.
Greez
Opa
edit: and drugs Counts militarily not as chemical weapon; but teargas do!