He should be classified as a deserter. They should drag his butt off to basic, and after recycling him 3 or 4 times, he should receive a less than honorable discharge.
I ran raw recruits through basic training at Ft. Knox Kentucky during the Viet Nam era. All draftees, and nobody wanted to be there, including yours truly. All we had to say was that we were going to teach them how to save their collective a**es when they went to war, and we always had 100% participation. In fact, I cannot recall one slacker in basic, and they were all eyes and ears from day 1. It always amazed me how that worked.