Did he ever register with Selective Service?
I didn't and it turned out to be a potential disaster. I enlisted on my 18th b/day and the recruiter told me not to bother registering for the draft. Four years of active duty later I came home and within 3 months, I was drafted because (the reason stated) I had failed to register.
I had to go to the county draft board and prove to them that I had 4 years active duty under my belt and was currently serving in the inactive reserve.
If memory serves, I didn't receive a DD214 until after that 2 year period of inactive reserve. It was a very long time ago and memory doesn't always "serve"