Slitherine

Is there a way to tell if either side has used gas yet, and if so who? Playing as the CP's I am trying to avoid it and am fairly sure I haven't upgraded any artillery since I got gas tech. (Incidentally, it would nice to be able to upgrade and say no to gas now that it has such a big diplomatic effect.) And anti-gas tech seems to be available. Does that mean the Entente has used gas, for sure? I don't remember seeing any news about it either way.

If the gas mask techs are available, someone has used it. Artillery units upgraded with gas have a little skull icon below the stats display. There isn't any way to track who was the first user though.

OK, thanks. Now I'll just have to spot the enemy artillery again...