Douglas C. MacArthur  -  General who commanded the Allies in the Southwest Pacific during World War II, he oversaw the post-war occupation of Japan, and commanded the UN forces during the first phases of the Korean War. It was MacArthur who engineered the amphibious assault on Inchon. Becoming increasingly egotistical as he got older, MacArthur began countermanding Truman's orders in Korea. With the backing of the Joint Chiefs of Staff, Truman relieved MacArthur of his command on April 11, 1951.