North-Korea has attacked South-Korea

North Korea has less to lose than South. If war begins, Seuol will be destroyed, no matter what SK and US try to do about it. And South Korea will avoid killing civilians, but I don't think NK cares much...

The only way Seoul could be saved would be nuking all of NK at once(and even then it'd be hard). Except hardly anybody would do that, even if more people would be saved that way. Personally I would've done that a long time ago if I had the chance to(or just evacuate Seoul and the like then attack). Would suck for the people in NK that want to live a normal live(unless it's possible to take out just the NK military) but it's probably going to be the only way. Unless NK suddenly decides they've had enough of this stupid conflict and just wants to be friends.