Military career:
December 1914: 2nd Lieutenant
?: Lieutenant
11 December 1916: Captain
1 April 1918: Captain/Flight Lieutenant
1 August 1918: Major/Squadron Leader
1 July 1925: Wing Commander
1 July 1932: Group Captain
1 July 1936: Air Commodore
?: Air Vice Marshal
6 June 1945: Air Marshal
16 January 1947: Air Chief Marshal
1 July 1947: Retired
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