You'd rather be in a Chinese sub than a US one? Not me.
Truman pulled Macarthur who was kicking butt:
www.trumanlibrary.gov
The general assured the president that the Korean War would be short-lived and that the American troops would be home by Christmas. MacArthur was initially successful in driving back the North Korean forces over the 38th parallel. He made a controversial move, however, when he continued to push the North Koreans further north and suggested bombing cities in China that were thought to be aiding the North Korean troops. In pushing for a larger conflict, MacArthur downplayed the risk of inciting a massive war in Asia.
President Truman’s main concern was saving as many lives as possible, even if that meant signing a ceasefire along the 38th parallel. General MacArthur did not think a ceasefire was an appropriate solution. The two men clashed. For Truman, the war represented an opportunity to stop the spread of communism into South Korea. For MacArthur, the war was an opportunity to liberate the North from communist control, and aggressive action was required.
MacArthur thwarted Truman’s attempt to negotiate a ceasefire when the general ordered his troops to invade North Korea and push the NKPA up past the 38th parallel. This was not the first time the general had ignored direct orders from his Commander in Chief. On April 11, 1951, President Truman officially relieved Douglas MacArthur of his command. Word of his firing spread quickly, and the American public found the news upsetting. Truman felt that his decision was just because MacArthur had overstepped his authority, defied direct orders from his superior and interfered with Truman’s hope of ending the Korean War quickly.