In 1906, Chetwode became assistant military secretary to Sir John French and on 3 January 1908 he was promoted to lieutenant-colonel on appointment as commanding officer of the 19th Hussars.
I 1906 blev Chetwode assiterende militærsekretær for Sir John French og den 3. januar 1908 blev han forfremmet til oberstløjtnant da han fik kommandoen over 19. husarregiment.