Do you have any references or links? For what were they being drafted, neurosurgery or similar level of skill? I can't believe they were drafting them to be grunts.
They we're freeing up younger men in the rear.
No link. My dad told me.
In 1970, I was in Phu Loi,RVN and got to know the Doc at our aid station.He was a surgeon from Boston and was drafted.
He was 46 and very pissed off.