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.
North-West Mounted Police
The North-West Mounted Police was created due to the expansion of the newly formed Dominion of Canada into the North-West Territories during the 1870s. The Dominion had been formed in 1867 by the confederation of the British colonies of Canada, Nova Scotia and New Brunswick, but the extensive lands to the north-west remained governed by the Hudson's Bay Company. The new Dominion government was keen to expand westwards, in part due to fears that the United States might annex the region. It agreed to purchase the company's lands in exchange for £300,000 and various grants of land, adding around of territory to the Dominion in 1870.