North-Korea has attacked South-Korea

Cherynobl in 1986.

400 times more radioactive material than the bombing of Hiroshima. I do not know how powerful modern nukes are, but they might be comparable.

The disaster happened next to a major water-network, so the effects were spread more than would otherwise be.

Ninja'd by Eos while I tried to read up on Hiroshima.

You guys forget how "Primitive" North Korea is.

Their weapons are made from scrap from 50 years ago, anything they make is rusted and beaten up. If they even try to launch a nuke it'll just run out of juice and fall back on them.

South Korea is however more advanced and can easily beat the crap out of North.

As for china, they'll just shoot anyone who crosses their waters.