SYRIA thread

[Husar]

From wiki on chemical weapons:

From same link, the Italians applaid mustard and tear gas liberally in Ethiopia before the war. Similarly with the Japanese in Asia, though over a longer time period through the war.

Can't find anything about specific application or morbidities from tear gas/smoke on Western Front. For smoke, I assume, most of the (unintentional) effect must have to induce chronic conditions in one's own troops.

All that is a FarCry(tm) from what Sarmatian said though:

If any serious conflict in the vein of WW2 happens again, all those rules and regulations will go out the window, like they did in WW2.

Not only were the Nazis barely "socially acceptable" in their behavior and everyone was trying to stop what they were doing, your point about the Italians was apparently happening before the war.
The allies didn't quite bomb Dresden with mustard gas and the nukes were quite new and pretty much immediately added to the list of weapons one should not use.

It was still pretty much total war since everyone was carpet bombing civilians and soldiers alike, but the rules about chemical weapons use did not quite "fly out the window" the moment it started.