1970’s-we had a guy that reminded me of Lennie in Of Mice And Men. Totally unqualified to serve. Viet Nam was going on so they let him in with the idea he’d have 2 years to get up to snuff-didn’t happen. The first sergeant had to get him to take a bath.
Sounds like the guy was one of SecDef McNamara’s “100,000.” It was his program to get more draftees by dramatically lowering the mental qualifications required, essentially drafting those who would have been deemed “mentally unfit” for service.