[2] Crawford was commissioned into the Royal Engineers in February 1915[3] and went on to serve in the First World War, being awarded the Military Cross in 1919.

[4] Attending the Staff College, Camberley, from 1929 to 1930, Crawford also served in the Second World War, joining the British Expeditionary Force to France in 1939.

[5] After the war, Crawford was made General Officer Commanding British Forces in Greece.

[5] In 1947 he was appointed Deputy Chief of the Imperial General Staff and, in 1949, he became Controller at the Ministry of Supply.

[6] In 1952 he was made Chairman of the Royal Ordnance Factories Board of Management; he retired in 1953.