if neutrals are building infantry and such, then we go back to who gets to decide that? if they are neutral they we can’t say the other side, because both sides are the other side. if we give neutrals a standing army, and a military growth chart that sets how they grow each round or so, but deciding what Spain or Saudi Arabia could build is gonna be a big argument in game by the two sides and really isn’t going to be worth playing with, unless we made all the neutrals a standing 7th player and let them work together the whole game, but that’s so far from history…
–if we give neutrals a standing army, then to declare war I would think shouldn’t need to cost anything, as they have to fight enemy troops and there is a cost to that.
–if we don’t give them a standing army, then yes, there should be a cost to declaring war, whether in dice, or that they have to move the number of units equal to the value of the territory in, or that the other side gets to roll equal number of dice to the value of the territory, then divide in half, round up to take the economic toll. in some way should be a cost, beyond the classic 3IPC cost.
–if it is just diplomatic, then the cost of the dice work for that.