What would happen if Luxembourg attempted to attack China? Either way we go there will be some sort of issues. I've gone round and round on this exact topic several times in a couple of regions. Either way isn't go to be totally fair. If we use NS population older nations wind up with a decided advantage. If we use real life populations small nations and those in bad climates (places where people don't want to really live) wind up with a disadvantage. The closest to fair scheme I've ever seen was one where after a nation reached a certain population they started handicapping them, saying they could only use a certain % of their population.