I kind of have to back North Korea up as well , because we all know at the end of the day North Korea has barely any powerful missiles or artillery, but the back up of their mutual alliance. Any threats or action made on North Korea will result in either china or Russia helping them. So even if America were to use their technology on them, it's the amount of men their going to have on the battlefield, and with Russia having one of the biggest armies in world them alone to take on America with North Korea helping and china aiding. Plus having all their technology at once may be a big concern for America because their nukes will definitely brake through Americas boarders. So they need to think twice on what they are going to do.

We all know Americas military technology is far greater than any countries technology, even to this day. so north koreas ambition is to 'try' and take out

Americas cities when not only they have have faulty missiles, but they can't even reach 5 miles distance, plus feed their people to even give them strength to fight. Even if the missile were to reach the USA boarder, America has the technology to detect the missile and take it out. But if America were to retaliate, North Korea wouldn't stand a chance to take it out. Really and truly, America needs no training drills because they can fight with no marines or heavy artillery because they can use one launch of a missile to wipe out their land....end of.