During the Second World War, the RCASC supported Canadian Army Formations that fought in Hong Kong, Italy, North West Europe as well as the short lived Pacific Force and Occupation Force that entered Germany in July 1945.
Just prior to the war, the divisional RCASC units were reorganized into "columns"whose CO's assumed the title CRASC. during the conflict. new units sprang up as needs changed. Advanced stationary depots, close support raft platoons, corps composite companies,petrol platoons, port platoons, tipper companiesand even a mobile petroleum labratory.
Corps units performed effectively in the mud and mountains of Italy, and were instrumental in the landings and subsequent breakout of Normandy.Operation "Gold Flake" was the largest wartime movement control task undertaken by the RCASC. During February and March 1945, an entire Canadian Corps was moved by sea from Italy to Marseilles France. The corps was moved by road to join the rest of 1st Canadian Army in Belgium. The RCASC played a pivotal role in transporting men and supplies in the liberation of Holland and the defeat of Germany.