The Royal Canadian Army Service Corps (RCASC) was an administrative and transport corps of the Canadian Army. The Canadian Army Service Corps was established in the Non-Permanent Active Militia in 1901, and in the Permanent Active Militia in 1903.[2] The Canadian Permanent Army Service Corps was redesignated The Royal Canadian Army Service Corps on 3 Nov 1919.

 The RCASC was established, by General Order No. 141, as the Canadian Army Service Corps (CASC), on November 1, 1901. The CASC was modelled directly off the British Army Service Corps to provide all transportation and supply services to the Army. Initially, the CASC consisted of four companies to support the Active Militia units. The Corps grew quickly, doubling the number of units by 1903, and growing by another three companies by 1905. By the summer of 1914 the CASC had a strength of 3000 personnel in eighteen companies.

 During World War I, the CASC provided a support element for each Canadian Division, and later on, for the Canadian Corps. With the introduction of motorized vehicles, the CASC carried commodities of a greater range and of greater weights. Motorized transportation also resulted in expanded responsibilities such as driving ambulances and engineer pontoon vehicles, carrying all natures of ammunition, and mobile repair and recovery. In recognition of the services rendered during the Great War, His Majesty King George V authorized the designator “Royal” in 1919.

The RCASC, along with the rest of the Army, underwent a rapid expansion as Canada mobilized for the Second World War. In addition to maintaining transport for the army on land, the R.C.A.S.C. also commanded and maintained a ship-borne freight and patrol company, the Pacific Command Water Transport Company, R.C.A.S.C., during World War II. The RCASC provided support to Canadian Soldiers wherever they went; training in Canada and Great Britain, the campaign in north-west Europe, and in the campaign in Italy. The RCASC moved supplies from the rear areas to the front-lines. They delivered all rations, ammunition, petroleum products, and all other essentials. They did so with a variety of vehicles ranging from three to ten ton trucks, and forty ton tank transporters.