I've just had a thought about the lack of McMamara at Defence - no Project 100,000 / McNamara's Morons. No-one else is going to force the military to take draftees who've failed the IQ test, so the US army is probably hurting for manpower (Air Force and Navy managed OK as they were more attractive / more exciting / safer). OTL Project 100,000 meant there was a regular supply of warm (if not very bright) bodies coming in, so there was no need to take the
politically tricky step of cracking down on draft dodging. But that isn't the case here.
An Apocalypse Now quote, excellent.described by one journalist as “rock-and-rollers with one foot in the grave”