At the beginning (1950) of the Korean War he was appointed commander of UN military forces in South Korea, while retaining his command of Allied forces in Japan. After driving the North Korean forces back over the 38th parallel, MacArthur received President Truman's permission to press into North Korea and advance all the way to the Yalu River—the border between North Korea and Communist China—despite warnings that this might provoke Chinese intervention. When China did intervene, causing the UN forces to fall back in disarray, MacArthur pressed for permission to bomb Chinese bases in Manchuria. Truman refused such permission and finally (after MacArthur had made the dispute public) removed him from command in Apr., 1951.
On his return to the United States, MacArthur was given a hero's welcome and invited to address a joint session of Congress. Another attempt to nominate MacArthur for the presidency was unsuccessful in 1952. Retired from active service, he became an officer of a large business corporation.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.