Like Adler pointed out this is a very unrealistic scenario indeed, however I'll play along.
Th answer to the question is a no-brainer, the US fails miserably.
Here's what the US would be up against:
The largest most advanced U-boat fleet in the world.
The best trained best equipped soldiers in the world.
The best tanks AFV's in the world.
Combined the best airforce in the world.
A larger and atleast as well equipped surface Navy.
The US would be fighting an already lost war.
Th answer to the question is a no-brainer, the US fails miserably.
Here's what the US would be up against:
The largest most advanced U-boat fleet in the world.
The best trained best equipped soldiers in the world.
The best tanks AFV's in the world.
Combined the best airforce in the world.
A larger and atleast as well equipped surface Navy.
The US would be fighting an already lost war.