Dominion Police
The Dominion Police, although the federal police of Canada, was mainly active in the Eastern Canada region, while the Royal Northwest Mounted Police handled the expansive and sparsely populated Northwest Territories of Western Canada. In May 1918, the 969-member Dominion Police was reassigned under the Department of Militia and Defence and became a civilian wing of the Canadian Military Police Corps (CMPC). In the early 1900s, the Royal Northwest Mounted Police had declined as the Northwest Territories was divided into new provinces and territories, and due to the general unpopularity of the force for conduct during industrial disputes such as the Winnipeg General Strike. On 1 February 1920, the civilian members of the CMPC, including the Dominion Police, were merged with the Royal Northwest Mounted Police to form the Royal Canadian Mounted Police as the new federal police force of Canada, and the CMPC was disbanded on 1 December 1920.
Royal Canadian Mounted Police
Prime Minister Sir John A. Macdonald first began planning a permanent force to patrol the North-West Territories after the Dominion of Canada purchased the territory from the Hudson's Bay Company. Reports from Army officers surveying the territory led to the recommendation that a mounted force of between 100 to 150 mounted riflemen could maintain law and order. The Prime Minister first announced the force as the "North West Mounted Rifles". However, officials in the United States raised concerns that an armed force along the border was a prelude to a military buildup. Macdonald then renamed the force the North-West Mounted Police (NWMP) when formed in 1873.