Are you kidding me? The North Koreans almost pushed the South Korean and US forces off the entire penninsula, and yet the US' counterattack was so successful that we scared China into intervening, yet we stopped them too against overwhelming numbers.
The US' goal was to liberate South Korea, taking all of the Korean Penninsula was a secondary objective, much like in Desert Storm, the goal was to liberate Kuwait, ousting Saddam was secondary and in the end we chose not to, yet when we go to finish the job we are critized by the rest of the world, why?
Chinese fighting spirit, phhh, I seem to recall hearing this about them, "They would walk straight into line after line of bullet fire because they were either very brave or to stupid to duck, but yet when we came after them with bayonets they took off at a dead run."