Hi Been there. I think I can understand where you're coming from. You must get sick of repeating things and explaining things. But at least he wants to know. There are plenty of kids out there who couldn't give a toss. At least he'll be keeping your memories alive after you've gone.
You should buy him the World at War box set. That should shut him up for a while.
P.s. Thanx for you're service and please do tell us more about your experiences.
many thanx
marcus