@Chacmool:
Maybe the violation of any neutral brings US on turn earlier (CPs inavde) or one turn later (Entente invades) into war against the CPs.
I don’t really know why this game departed from the method used in G40, that if a strict neutral was attacked, ALL strict neutrals would then become pro-whoever-didn’t-attack-them. This was a great deterrent to invading strict neutrals like Switzerland, and it makes real-world sense as well.
I would suggest that this simple change be made to the PTR. Imagine if Switzerland was invaded by Germany to widen the front, France could just pop down into Spain and pick up some free units/IPC’s. If France invaded Switzerland, Germany could roll through Holland and pick up some units along the way. Definitely a deterrent.