Let me preface this with a quote: "Genius may have its limitations, but stupidity is not thus handicapped." So anything is possible, but I'm going to assume that the USA player has some sense.
Originally posted by Minodrin
Umm, forgive me for disagreeing but those 2 panzers could occupy the whole continental US (They face 4 divisions, right?) before the US would get reserves in. Although keeping the US against an allied invasion (If the UK pulls away it's African and Indian forces) would be impossible.
Even if they were in supply the whole time, it would take those panzers two months to cross the country. Going to every state to occupy the whole thing, with resistance, would take probably take 2 or 3 times as long.
So even if:
1. You can manage to stay in supply.
2. UK, France, and USSR don't declare war on you
3. UK and France don't send any expeditionary forces
4. Your transports don't get sunk on the way to USA
It will still take you at least four months to take over the country, during which some the USA will have a good amount of IC's to play with, even if you take over a majority of the country. Militia only takes 1.5 months and will slow you down further, and hordes of inf will be ready in 3 months.
And if the invasion doesn't work, game over.