The only trouble with North Korea is that China will rear its red head if we go in. I would wager the bluster of this number of troops is meant to make China pause, rather than North Korea.
I doubt it will have the desired effect, as it is clear we are moving away from block numbers of troops to small scale elite forces able to be deployed immediately with little fuss. What they are unable to do, improved technology is meant to compensate. This is fairly well known by all.
Excellent and logical points.