This isn’t really encouraging anyone to war though. It’s just punishing them if they don’t. If you want to encourage war introduce something that rewards fighting. Like a buff to production or some other positive benefit. Even pairing that with this stagnation thing would be more palatable than just a negative. Else everyone is just sitting around til the stagnation piles up, we have one massive global then it’s back to months of twiddling our thumbs again, which is pretty much status quo.