That's just fake history. The US didn't start the Korean war, they helped SK stand free of the oppression of the seriously evil NK government.

China then interfered because they didn't want a US aligned country at their border.

However there have been decades since the affair settled - and I stand by my opinion that if the US and by extension NATO cares whatsoever, they'd have just told China "we won't interfere as long as you free NK citizens into free people".

It would've not been perfect at all, but at least the horrendous reality they are in would've been prevented.