The Royal 22nd Regiment is an infantry regiment of the Canadian Army. Known colloquially in English as the Van Doos or in French as le Vingt-deuxième, the mostly francophone regiment comprises three Regular Force battalions, two Primary Reserve battalions, and a band, making it the largest regiment in the Canadian Army. The headquarters of the regiment is at the Citadelle of Quebec in Quebec City, also the site of the regimental museum, and all three of its regular battalions are stationed at Canadian Forces Base Valcartier in Saint-Gabriel-de-Valcartier, 15 kilometres (9.3 mi) outside of Quebec City. The regiment is a "British-style" infantry regiment that is the spiritual home and repository of customs and traditions for a number of battalions that do not necessarily serve together operationally. It serves as the "local" infantry regiment for the province of Quebec, where it draws most of its recruits; it is the largest regiment in the province, in terms of numbers.

The Canadian Army is the command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases across Canada, and is also responsible for the Army Reserve, the largest component of the Primary Reserve. The Army is headed by the Commander of the Canadian Army and Chief of the Army Staff, who is subordinate to the Chief of the Defence Staff. The Army is also supported by 3,000 civilian employees from the public service.