Fact is NK has a huge number of artillery pointed at Seoul, a world-class city of some 10 million people. The former is quite capable of turning the latter into rubble in about a half hour (at which point the former would pretty much cease to exist).
This is definitely the one thing that U.S. and South Korean military planners worry about. The NK navy and air force will cease to exist within 24 hours of hostilities, then the air defenses will be worn down over the next several days. Their ground forces, while large, have no real operational experience in today's high tempo operations and without air cover are going to suffer horrific losses. The issue is with the artillery. I read a few years ago in a study that with ROK, U.S., and Japanese aircraft flying strikes 24/7 that it would take at least a week to knock out all of the artillery in range of Seoul. By that time the city would be mostly rubble.
I’ve read that line about NK having tons of artillery pointed at Seoul many times, but mapping it out shows that very little of Seoul is within tube artillery range of NK.
The Nork 240mm MRLs are a different matter, but except for their newest model, those still have to be fired from a 15x15 mile area of NK that would be taking a hell of a hammering from above.
No doubt Seoul would be hit hard, but it would be like London during the Blitz, not Berlin in ‘45.
I BETTER GET A NON- SAMSUNG PHONE?