>>509179638
What? They went past the 38th parallel before being pushed back.
The war stall mated at the 38th because the UN forces were never built up for a major push. It was a series of pushes by chinese led forces making small gains before being pushed back to the original starting lines.
UN Forces never committed enough ground soldiers and equipment for an offensive. While US air power ensured that logistically Chinese and North Korean forces could never build up enough forces to make push.
Also the big part you missed:
It was land based logistics train. Much easier to defend than a naval route.