14 or 21, I'm aware of no regulations in the military which approves sneaking someone on base and hiding them in the barracks to have sex. One could surmise he knew he was doing something wrong. 
@rangerrebew I can't even begin to guess HOW he managed to smuggle her into a barracks and hide her for even 1 day. MAYBE if he was a SSG or higher rank with a private room with it's own bath,but even that would be tough. After all,she wasn't a prisoner that was kept chained to the plumbing and with a gag in her mouth,was she?
If she was,I want to read that SOB has been convicted rape,rape of a minor,kidnapping,and torture,and sentenced to death.
I would also like to buy a ticket to his execution to make sure it happens.