In July 1944, Sweeney was assigned to the 73rd Bomb Wing and moved with this unit from Colorado Springs, Colorado, to the Pacific area, serving as chief of staff and later deputy commander. While with the wing in the Marianas, he participated in the first unprecedented low-level attack with B-29 Superfortress bombers against the Japanese. On a later mission he lost his aircraft, paddled ashore in a life raft, and returned to his island base. In July 1945, he became director of plans of the Strategic Air Force, Pacific Ocean Area, Guam. After the war he served as a member of the Joint War Plans Committee for the USAAF in Washington, D.C., until July 1946 when he became an instructor at the National War College. [citation needed]
In October 1947, Sweeney was assigned to the Office of the Assistant Secretary of the Air Force, and the following year was named director of plans for Strategic Air Command with headquarters at Omaha, Nebraska. [citation needed]
In April 1953, he was assigned to command the Fifteenth Air Force at March Air Force Base, California. In June 1954, while commander of this strategic bomber force, he led a trio of B-47 Stratojet bombers in history's first non-stop flight of jet bombers across the Pacific Ocean.
In October 1961 Sweeney was promoted to four-star rank and assumed command of Tactical Air Command with headquarters at Langley Air Force Base, Virginia. He retired from the USAF on August 1, 1965, and died of cancer on December 22, 1965.[1]