I'm curious about the legality of mandatory military service in different countries, such as the US and Singapore. I only recently came across this concept when reading about the Vietnam war. I'm very surprised that such a barbaric(IMO) thing still exists today. In my opinion, mandatory military service looks very similar to slavery. So, I have a couple of questions. Is there any way to completely avoid this military service? I read on there existing a provision of conscientious objection, but I don't understand how it works now. What happens to anyone who opposes conscription as a conscientious objector? In the Iraq war, the US army consists only of volunteers? If so, is there any possibility that compulsory conscription may be introduced?