Cyril Deverell Field Marshal Sir Cyril John Deverell , GCB , KBE , ADC , DL ( 9 November 1874 – 12 May 1947 ) was a British career military officer who served as Chief of the Imperial General Staff in 1936 and 1937 . He fought in the Fourth Anglo - Ashanti War and World War I and later advised the Government on the importance of maintaining the capability to mount an Expeditionary Force for operations on mainland Europe . Army career . Born the son of Lieutenant John Baines Seddon Deverell and Harriet Strappini Deverell ( née Roberts ) and educated at Bedford School , Deverell was commissioned into the Prince of Wales ' s West Yorkshire Regiment on 6 March 1895 . He served in the Fourth Anglo - Ashanti War in 1896 and was then promoted to lieutenant on 3 August 1898 . He was appointed adjutant of his Regiment on 9 February 1904 before being promoted to captain on 23 February 1904 . He served in World War I initially as brigade major for 85th Brigade , in which role he joined the British Expeditionary Force and saw action at the Second Battle of Ypres in April 1915 before being promoted to major on 3 June 1915 . Deverell became Commanding Officer of 4th Battalion , the East Yorkshire Regiment in July 1915 and was then asked to command the 20th Brigade from 29 October 1915 . Promoted to lieutenant colonel on 26 August 1916 , he took part in the Battle of the Somme in Autumn 1916 . It held a position on the 21st Division ' s right flank during the Battle of Bazentin Ridge and attacked the Switch Line to the east of High Wood ; one of Deverell ' s men , Theodore Veale , won the Victoria Cross during this action . Promoted to the substantive rank of colonel and temporary major - general on 1 January 1917 , Deverell was given command of the 3rd Division after its commander , Sir Aylmer Haldane , took over VI Corps . He led the division at Arras in 1917 , then participated in the latter stages of the Battle of Passchendaele . He returned to the Somme in 1918 , before fighting alongside the Portuguese at the Battle of the Lys . The division participated in the Hundred Days Offensive , finally leading to the German surrender on 11 November 1918 . He was appointed CB in 1918 and awarded the Croix de guerre in 1919 . He commanded that division until 1 January 1919 , when , having been promoted to substantive major - general , he took over command of the 53rd ( Welsh ) Division . On 13 December 1921 he moved to India where he commanded the United Provinces District . Having been appointed KBE in the Kings Birthday Honours 1926 , he served as Quartermaster - General of India from 25 February 1927 and , having been promoted to lieutenant - general on 13 March 1928 and advanced to KCB in the Kings Birthday Honours 1929 , he became Chief of the General Staff in India in 1930 . He became General Officer Commanding - in - Chief of Western Command on 11 April 1931 and then , having been promoted to full general on 21 April 1933 , he was appointed General Officer Commanding - in - Chief of Eastern Command on 8 May 1933 . He was appointed ADC to the King on 10 February 1934 and promoted to field marshal on 15 May 1936 before assuming the position of Chief of the Imperial General Staff that same day . In that capacity he advised the Government on the importance of maintaining the capability to mount an Expeditionary Force for operations on mainland Europe . In May 1937 Leslie Hore - Belisha , the newly appointed Secretary of State for War , sought to implement a new policy of limiting expenditure on the army , particularly on tanks , and when Deverall failed to show enthusiasm for that policy in the context of an increasing threat from Germany , Hore - Belisha wrote to him , advising him that he had been removed from office . Deverell wrote a reply to the Secretary of State , strongly objecting to the adverse comments that had been made on his own performance , and retired from the British Army on 6 December 1937 . He was also Colonel of the Prince of Wales ' s West Yorkshire Regiment from 21 March 1934 . In retirement he became Deputy Lieutenant of Southampton . His interests included local politics ; he served on the borough council and chaired the local defence committee during World War II . He lived at Court Lodge in Lymington and died there on 12 May 1947 . Family . In 1902 he married Hilda Grant - Dalton ; they had a son and a daughter . External links .