[PhasmaFelis]

As I understand it, the main reason that we and/or South Korea haven't moshed all over NK like we did in Afghanistan and Iraq is that they've got enough ancient, obsolete, but still quite explosive artillery aimed at Seoul to do at least Hiroshima levels of damage to it.

It'll only get worse once they've got actual nuclear capability, but it's not like you can just declare that you've decided to sacrifice SK's capital and largest city because bad stuff might happen in the future.

[Grishnakh]

Well the big reason the US hasn't "moshed" all over NK is because they have nothing we want. They don't have any really significant resources that I'm aware of, and certainly don't have any oil. They're also right next to China, and China likes to keep them there as a buffer from American-aligned nations like SK and Japan.

Basically, both China and the US are probably rather worried about the situation there, because the NK leadership is so wacky and volatile; neither side actually wants to take over NK because that'd mean having to deal with their internal problems and a giant, starving population that's been fed crazy propaganda from birth about the divinity of their leaders. No one wants to deal with that problem.