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.
Canadian Army
Prior to Confederation in 1867, the British Army, which included both "Fencible" Regiments of the British Army—recruited within British North America exclusively for service in North America—and Canadian militia units, was responsible for the defence of Canada. Some current regiments of the Canadian Army trace their origins to these pre-Confederation militia and Fencible units. Following the passage of the "Militia Act of 1855", the Permanent Active Militia was formed, and in later decades several regular bodies of troops were created, their descendants becoming the Royal Canadian Horse Artillery, the Royal Canadian Dragoons, and the Royal Canadian Regiment. Regular Canadian troops participated in the North West Rebellion in 1885, the South African War (Second Boer War) in 1899, and, in much larger numbers, constituted the Canadian Expeditionary Force in First World War.