10 December 1939
No. 1 Provost Company (RCMP), which had formed in Rockliffe, ON, set sail to Great Britain to act as the military police for the First Canadian Infantry Division. These MP would form the nucleus of the first formation which would later become the Canadian Provost Corps.
Shortly after Canada's declaration of war on September 9th, 1939, the Commissioner of the Royal Canadian Mounted Police (RCMP) recommended to the Canadian Minister of Justice that a "Provost" company be formed from RCMP volunteers and used to provide military police support to 1 Canadian Infantry Division, the first expeditionary element to be deployed overseas since World War 1. This unit, designated No. 1 Provost Company (RCMP), was the first of several military companies that would be formed and mobilized throughout the following months.