Yep -- all you need to get a good war going is an excess of young men and a border. For a domestic conflict you can skip the second part.
Or you can look at it from a purely economic standpoint: if your military-aged men are mostly finding gainful employment and you want to raise an army you need to either conscript or pay competitive wages. Either way you're damaging your economy. If you have far more people that age then prospective jobs it's way cheaper to convince some of them to put on a uniform.
Or you can look at it from a purely economic standpoint: if your military-aged men are mostly finding gainful employment and you want to raise an army you need to either conscript or pay competitive wages. Either way you're damaging your economy. If you have far more people that age then prospective jobs it's way cheaper to convince some of them to put on a uniform.