I inlisted in the Army right out of high school in 1958.
I was given an opportunity to go to OCS right after Basic Training. I did not want to stay in, so I didn't take the offer.
OCS was offered to some new recruits based on their entrance exams. Those over a certain score were offered OCS.
Thanks for taking the time to share the OCS/operation bootstrap/entrance exam information. Now, his not having a degree or taking several years to get it doesn't sound unusual at all!