Air Chief Marshal Sir Robert Mordaunt Foster, KCB, CBE, DFC, DL (3 September 1898 – 23 October 1973) was a Royal Flying Corps pilot in the First World War, and a senior commander in the Royal Air Force during the Second World War and the immediate post-war years.

Later in the war Foster returned to Great Britain, carrying out home defence duties whilst serving with No.

[3] On one occasion during his nearly four years in India, after suffering an aircraft fire, Foster and his observer had to make a forced landing and they were subsequently captured and held for three weeks before being released.

[13] In May 1925 Foster attended the RAF Staff College and the following year he spent several months at the School of Oriental Studies in London.

[3] After this period of study, Foster spent the remainder of the 1920s carrying out intelligence duties at the headquarters of RAF Iraq Command.

[3] In 1935, Foster returned to Iraq, serving on the air staff at the British Forces headquarters where he received promotion to wing commander[3] on 1 July 1937.

[15] His last tour before the outbreak of the Second World War was in the Deputy Directorate of Plans on the Air Staff.

[3] Following the defeat of the Germany, from August 1945, Foster served on the Allied Commission for Austria as the Chief of the Air Division.

[3] He was promoted to Air Chief Marshal on 28 January 1953[20] and he handed over command to Sir Harry Broadhurst in December that year.