Lineage (excerpt)
Redesignated 'No.121 (Fighter) Squadron' 15 November 1937. Disbanded 30 September 1939.
Reformed as 'No.121 (Composite) Squadron' 10 January 1942. Disbanded 30 September 1945.
Operational history
The Second World War
The squadron flew on communications, target towing and rescue operations under 'Eastern Air Command'.
Government of Canada, The Insignia and Lineages of the Canadian Forces, Volume 4: Operational Flying Squadrons (A-AD-267-000/AF-004)