From a military readiness standpoint there are more reasons for U.S. to oppose universal mandatory service than to support it. Conscripted forces are, if anything, consistently underwhelming. Bongo Bill just made the good points about Israel- since the U.S. is not surrounded by hostile neighbors, it's hard to imagine the system working again. We retain selective service for just such times, after all, but the draft ended in the 70s and I don't want it anywhere near the military today.