During World War Two the Canadian Armed Forces adopted a new set of Overseas Chevrons to be worn on the lower left sleeve.It was created in 1942 and was retroactive to September 10, 1939. Recipients had to have been servicemen in the Canadian Active Service Force or have joined the CASF on or after September 10, 1940 to qualify. Each 12 months of war service overseas was represented by a black chevron on green (later changed to a red chevron). A year or more of pre-war service on or before September 10, 1939 was designated by a white chevron (which took the place of the World War I Overseas Chevrons). It was moved to the lower right sleeve in 1944.
Units in Canada were allowed to wear them, but British rules forbade their wear in the United Kingdom or a European war zone until 1944. Perhaps this was due to potential confusion with the Free French Army's rank insignia for Corporal, Sergeant and Corporal Chef - which was a series of red or red-over-silver chevrons. Or perhaps they could be confused with the British Army's rifle-green Good Conduct stripes worn by the Rifles regiments or the red Good Conduct stripes worn by the Military Police.