As long as the threat is taken seriously and treated like a real threat so that all resources are brought to bear, I would imagine they could be sunk very quickly.
But hubris is our military's biggest Achilles heel and no one ever seems to learn from past mistakes. Our military is second to none but anyone who underestimates and scoffs at their opponent has always been in for a bad surprise.
"Stupid Japs, we'll lick'em in a week."
"Bunch of f*ckin' Vietnamese can't hurt us."
And so forth...
We eventually kick ass but not before getting a lots of Americans killed.
Agree with all points. Eventually, the NK can be defeated, but there will be many deaths.
Also, keep in mind that the South has built it's capital's (Seoul) heavily populated suburbs virtually up to the North Korean border (DMZ) and North Korea has over 20,000 artillery pieces looking down into the city's environs. It would be a bloodbath!
