For All Time would obviously be hard to adapt, but I thought of a good way: a Victoria 3 modification. The diplomatic play system in particular would be handy for whether countries escalate to nuclear war or not, and having provinces that contain uranium or polities willing to trade it with you would be nigh-vital for great power status.
I wouldn't know what to do about all the guerrilla warfare or terrorism; that might be hard.
I wouldn't know what to do about all the guerrilla warfare or terrorism; that might be hard.