How about we could have presidents in the game? They would act as a diplomat and as a troop, that can travel around. The president could be kidnapped by another country, but ONLY special forces could do that. When the president would be captured, the morale of every province would fall for about 50 or 25%. Kidnapped president could be murdered or sold back for a price, that is given by the holder's country. You could also get the president back with your own special forces.