Claim: The Jämtland Air Force Wing was redesigned in 1947 as a fighter wing and received surplus P-51 Mustangs, American long-range single-seat fighter jets first used in World War I.
Evidence: The North American Aviation P-51 Mustang is an American long-range, single-seat fighter and fighter-bomber used during World War II and the Korean War, among other conflicts. 26 October 1940 World War I (or the First World War, often abbreviated as WWI or WW1) was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918.