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
Instead, in December 1918 Borden reorganized the federal Canadian security system by splitting the policing of the country geographically, with the mounted police running the western half and reporting to the President of the Privy Council, and the Dominion Police running the eastern side, under the oversight of the Minister of Justice. The establishment of the mounted force was to be permanently kept at 1,200 men, creating a huge demand for manpower: those members of the force still serving in Europe and Siberia were ordered to return. The police began to recruit new networks of secret agents, whom Perry tasked to investigate "foreign settlements" to identify "the least indication of Bolshevik tendencies and doctrines", and the force embraced new laws allowing for the deportation, without trial, of immigrants suspected of holding extremist views. The police's operations were well run, although no significant evidence of any Bolshevik plot was actually discovered.