Nope. We didn't flee North Korea in 1950.
Never heard of the Chosin Reservoir? Hungnam? (Hint, the Hungnam evacuation ended Dec. 24, 1950.
The US got their butts whipped by the Chicoms in North Korea in 1950. The Marines did make a decent showing in the breakout and fighting retreat. Meanwhile, while X Corps was being evacuated through Hungnam, the 8th Army was also in rapid retreat from North Korea.