[rmlew]

We don't need artillary to take out the North Korean Artillary. (Although a few MLRS systems would be nice.)
Our first generation of brilliant weapons would do nicely.
Imagine the following scenario.
24 Super Hornets are launched from a carrier, each carrier 4 JSOW's. The JSOW's are lanched 80 miles from the DMZ. 12 open up over a specific target box (gotta love GPS) droping 145 smart submunitions. Each of these submunitions targets an individual artillry piecem muntions depot, or light vehicle with a combined effects warhead. 8 JSOW-B's open up to carry 24 anti-tank guided munitions. The remaining 4 JSOW-C's hit barracks.
At the same time Navy planes carrying the stealthy JASSM's hit command and control facilities and radar facilities. The entire attack would take under 15 minutes from the launch point 80 miles over the ocean.
F-16's carrying HARM's take out the surviving radar stations whose crews are foolish enough to turn on their units in an uncoordinated manner.
A-10's carrying Maveriks and cluster bombs take out the rest.

American B-2's could take out the WMD's and major structures. A few dozen Tomahawk missles, launched ahead of the Navy fighters would hit the North Korean missle facilities and airfields.

After an hour or day of total shock and awe, American radio broadcasts messages urging surrender to the North Korean troops and leaders.
I don't think that the shattered military and starving populace would choose to die for Kim Jong-Il.

[lepton]

We don't need artillary to take out the North Korean Artillary. (Although a few MLRS systems would be nice.)

When I began looking the information up for my post, I started with the idea that putting down scatterable mines and sub-munitions over the whole of the area that the artillery would come from would be doable. It may well be. There is no question that we would be able to bring a great deal of firepower to bear. The problem with relying wholly on the submunitions is that anything sheltered or unexposed will survive, and be capable of then firing. The MRLSs that the North Koreans have can move out, fire their dozen or two dozen rockets, and move back under cover for reloading within three minutes. To take these out requires singular munitions addressed against them.

The counter side of this is that many of N Koreas hardened facilities are 20km or so behind the DMZ, and further, the mountains limit the types of guns and rockets that can actually strike Seoul.

In a general strike, one has the potential of facing 8,000 large caliber artillery rounds hitting the northern part of a city of 10,000,000, in a predesignated fire pattern, in the first minute. One has a lot of loose ends to sweep up very rapidly. This really isn't a military attack, but rather a terror one against civilians.