Vietnam-era American forces overwhelm the Axis in 1942

What if the US armed forces of January 1942 were replaced by their Vietnam-era counterparts, including logistics?

The Axis faces a major air and naval disadvantage, while adapting 1942 industry remains necessary and ground forces retain some conventional vulnerabilities.

Replacing the US services and their logistics with Vietnam-era equivalents creates a large advantage in air and naval warfare. B-52s and jets would be far beyond the aircraft and defences available in 1942. Helicopters add air mobility, while numerous Skyraiders bring much more close-support firepower. The scale of the advantage on land is disputed: the M48 would be a major advance over 1942 tanks, but conventional tactics could still destroy it. A Skyraider also delivers more ordnance without completely changing the way defenders must respond to an attack. The transferred logistics would help sustain these forces, but American factories remain at their 1942 level and dockside handling would still need adaptation. The scenario therefore leaves an industrial problem even while creating overwhelming advantages in several forms of combat.