

And this goes back to the Cold War, which goes back to WWII, and the politics of the president and military commanders, specifically MacArthur, who wanted to continue north and take North Korea decisively to keep the Soviet Union and China from controlling it before it could be reinforced by Chinese soldiers.
At the time, North Korean soldiers were outnumbered by UN forces 3:1, with far more tanks, etc than NK had.
The UN waffled, and by the time they decided Korea should be reunified, China had shipped in nearly 300,000 troops, and an unknown amount of matériel.
Fuck the UN. It’s their fault this is still going on.
No one wants the ugliness of a war over NK, but everyone wants their natural resources, estimated to be one of the largest deposit of minerals in the world.