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 World War I, King George V authorized the designator "Royal" in 1919.