The history of the Afghan Air Force began when it was established on 19 August 1919. In 1924 and 1925 it saw action when it fought against the Khost rebellion. As early as 1921, the Soviet Union and Great Britain provided a small number of aircraft to Afghanistan's King, Amanullah Khan, who had been impressed with the British use of aircraft against his government in 1919 during the Third Anglo-Afghan War, however they were not made into a separate air arm until 1924. For the next decade, Soviet pilots performed the bulk of the flying and equipping for the AAF, probably about one-half of the aircraft were Polikarpov R-1s, a Soviet copy of the de Havilland DH.9A. Most AAF aircraft were destroyed in the civil war that began in December 1928, and it was not before 1937 that a serious rebuilding effort began. From the late 1930s until World War II, British Hawker Hind and Italian IMAM Ro.37 aircraft constituted the bulk of the Afghan Air Force, which by 1938 amounted to about 30 planes in service. The Hawker Hind remained in the Afghan inventory until 1957, and as of 2009 one former Afghan Air Force Hawker Hind still flew in the Shuttleworth Collection. In 1947, the Air Force was redesignated the Royal Afghan Air Force (RAAF), a title it retained until further political upheaval in 1973.