no it's not. It took the US 6 months,
with a functional economy, and NO oppostion, to put .5 million troops in the Gulf, in 1990. You couldn't do in the US what we did in Nam, carpet bombing, Agent Orange, Napalm, etc, without ruiniing what you came to SIEZE, dummies. We didn't CARE if we rendered Nam a wasteland. What would be the POINT of conquering the US, if everything is charred rubble, hmm? They WANT our industrial plant, trained workers, etc. All of that would be GONE, and they'd have had 10's of millions of expensive troops shot. None of which they could get here in the first place, of course.