There are countries that still used forced conscription, and as wars are being fought, somebody off the street, could find themselves on the front line, so is the question not, Would you volunteer, but would you refuse, at the risk of going to jail, for saying no? At the time of the great war, and 2nd world war, punishable by death. That's quite a motivator.
In this day and age, no need for conscription, due to long range missiles being available, but no war is ever going to be won by targetting the Middle East, send a bomb in, kill the leaders family, Gadaffi's, where he will send out suicide bombers to kill 30-1 every time. So we are on a loser, he is on a winner. NATO haven't played by the rules, and now civilians will take a hit once again. Iraq illegal war, Afghanistan, what are we doing there even? Muslims revolting against their leaders instead of the West for a change, why do we get involved? Russia soon withdrew. We've been there before with the IRA, and now the 'Real' IRA, when will it end?