The United States Army Air Forces, the aerial warfare service used by the Americans in the Second World War, was officially disbanded on the 18th of September, 1947. Unlike some other nations, the United States had no separate air force at the time.
The Forces, formed in 1941, the year the US entered the war, had been steadily diminished in size after the surrender of Japan in 1945. The service was replaced by the new and independent Air Force soon afterwards.
During the war the USAAF took part in campaigns against both Nazi Germany and its allies, and in the Pacific.