Uhhhhhhh.......... I hope you realize that we should never have to have a trained killer(at least how I am interpreting it) If you think about it logically, if we did not have any sort of Army, then that would cause a major disruption worldwide. Most veterans actually have an easy time readjusting to civilian life, but the ones you see you have had a traumatic experience or have become physiologically or physical disabled, which proves to be an enormous problem for those trying to get back.
ALSO! YOU KNOW WHAT ARMY I BELONG TO?