You'd also either have to ask parents to support their kids (just sons?) another year, or the govt. would have to put up the funds to pay every new year group. How much that'd cost I have no idea. I do though think society would benefit hugely from the discipline and learning respect for one another and the country. If conscription was ever necessary again, we'd have a year head start on the enemy. Even a year national service would benefit health too and encourage young people to keep up exercise.