Marshal of the Royal Air Force Hugh Montague Trenchard , 1st Viscount Trenchard GCB OM GCVO DSO ( 3 February 1873 - 10 February 1956 ) was a British officer who was instrumental in establishing the Royal Air Force .
Marshal of the Royal Air Force Hugh Montague Trenchard , 1st Viscount Trenchard GCB OM GCVO DSO ( 3 February 1873 - 10 February 1956 ) was a British Army officer who commanded the Royal Flying Corps ( RFC ) from August 1915 to January 1918 .