Colonel Archer Fortescue "Scotty" Duguid OBE DSO CD (31 August 1887 – 4 January 1976) was a Scottish-Canadian engineer, army officer, historian, and vexillologist.

Following the war, in 1921 he was appointed director of the army's Historical Section, a position he held until 1945; he remained the official historian of the Canadian Expeditionary Force until his retirement in 1947.

In 1938, Duguid published the first and only entry in a planned eight-volume official history of Canada's participation in the Great War.

Duguid was a noted expert in heraldry and vexillology, and designed a service flag for the Canadian Army that was in use from 1939 to 1944.

Among his other work as director of the Historical Section, Duguid designed the Memorial Chamber of the Peace Tower and was responsible for establishing red and white as the national colours of Canada.

After graduation, he elected to take jobs with the Grand Trunk Pacific Railway and Canadian Northern Montreal Tunnel and Terminal Company rather than pursue a commission.

Duguid returned to Canada in July 1919 and was retained by the army to continue his historical work.

The Canadian Army Historical Section had been formed on 15 November 1918 when Brigadier Ernest Alexander Cruikshank was appointed, by Order in Council P.C.

During his tenure as director of the section, his major undertaking was an official history of the Canadian Expeditionary Force in World War I.

[...] This maple leaf of ours is well and widely known today, everywhere reminiscent of Canada, having been worn by Canadian soldiers in 1914–1919 and having more recently been placed on the funnels of ships of the Royal Canadian Navy and on war vehicles and on every packing case containing war supplies made in Canada [...].

"[3] On 22 October 1945, Colonel Charles Perry Stacey succeeded Duguid as the director of the Historical Section.

Archer Fortescue Duguid died on 4 January 1976, age 88, in Kingston at his daughter Isobel's house.