Dominion Police
The Dominion Police Force was the federal police force of Canada between 1868 and 1920, and was one of the predecessors of the Royal Canadian Mounted Police. It was the first federal police force in Canada, formed the year following the Canadian Confederation to enforce federal laws and perform policing duties for the Federal Government of Canada. On 1 February 1920, the Dominion Police was merged with the North-West Mounted Police to form the Royal Canadian Mounted Police as the new federal police force of Canada.
Royal Canadian Mounted Police
The rank system of the RCMP is partly a result of their origin as a paramilitary force. Upon its founding, the RCMP adopted the rank insignia of the Canadian Army (which in turn came from the British Army), which is almost identical to that of the current Canadian Army. Like in a military, the RCMP also has a distinction between commissioned and non-commissioned officers. The non-commissioned ranks are mostly based off military ranks (apart from constable). Non-commissioned officer ranks above staff sergeant resemble those that formerly existed in the Canadian Army, but have since been replaced by warrant officers. The commissioned officer ranks, by contrast, use a set of non-military titles that are often used in Commonwealth police services. The number of higher ranks like chief superintendent and deputy commissioner have been added on and increased since the formation of the force, while the lower commissioned rank of sub-inspector has been dropped.