Assuming all your view points are valid, please take note of the following facts:
1) Historically the U.S. has never “tied” a war against a foreign country.
2) China gained 50 years of external peace so that Mao could initiate various maddening internal campaigns. The U.S. dared not to engage another land war with China. The U.S. land forces dared not to cross the 17th parallel in Vietnam. The U.S. took heed of China’s warning not to cross the 17th parallel. General MacArthur said in his dying days, to paraphrase, it is insane for any country to fight Chinese army (land force).
3) Chinese casualties in Korea were, let’s say, 10 times heavier than the U.S. The North Vietnamese’s casualties were many, many times over the U.S. Who won the Vietnam War?
4) If the China did not intervene in Korea, you had a situation where the Korea were occupied by the U.S. in the north east, Chiang Kai-shek’s Taiwan in the east (very anxious to recover), and the aggressive India in the south, not to mention French in the south
1) Historically the U.S. has never “tied” a war against a foreign country.
2) China gained 50 years of external peace so that Mao could initiate various maddening internal campaigns. The U.S. dared not to engage another land war with China. The U.S. land forces dared not to cross the 17th parallel in Vietnam. The U.S. took heed of China’s warning not to cross the 17th parallel. General MacArthur said in his dying days, to paraphrase, it is insane for any country to fight Chinese army (land force).
3) Chinese casualties in Korea were, let’s say, 10 times heavier than the U.S. The North Vietnamese’s casualties were many, many times over the U.S. Who won the Vietnam War?
4) If the China did not intervene in Korea, you had a situation where the Korea were occupied by the U.S. in the north east, Chiang Kai-shek’s Taiwan in the east (very anxious to recover), and the aggressive India in the south, not to mention French in the south