Presidential Promotion President Harry S. Truman promotes Omar N. Bradley to General of the Army in 1950. Bradley, who commanded the largest U.S. formation in history during World War II, is the only five-star general to serve as chairman of the Joint Chiefs of Staff. SHARE: Download: Full Size (0.56 MB) Tags: DoD Credit: National Archives VIRIN: 190814-O-ZZ999-0814.JPG Photo Gallery