On reorganization following World War II, the Canadian Grenadier Guards resumed its traditional Militia role as a Regiment of Foot Guards - many of those who had served overseas continued to serve the Regiment in Montreal. The peacetime routine of training, garrison duties and parades was highlighted by the appointment of King George VI as Colonel-in- Chief, the acceptance of the Honorary Colonelcy by FM The Viscount Alexander of Tunis (himself a Guardsman), the opening by him of the Regimental Museum as a Memorial to the Fallen in 1950 and the participation by members of the Regiment in Korea. With the formation of the Canadian Guards (a Regular unit of four Battalions) in 1953, the Regiment became the 6th Battalion, under which title it received a new Stand of Colours from HM Queen Elizabeth, the Colonel-in-Chief, in 1959 (the first occasion on which a Militia unit received a Stand of Colours in Canada from the hand of a reigning Sovereign).
Although the responsibility for Public Duties in Ottawa was assumed by the Canadian Guards, the Regiment provided individuals for this purpose until the formation of the Public Duties Detachment (later the Ceremonial Guard) in 1969. Since that date, No 2 (CGG) Company has participated in the Changing of the Guard on Rideau Hall during the summer months. As a result, the City of Ottawa granted its Freedom to the Regiment in 1979; a similar grant was made by Montreal in 1989 in commemoration of 225 years of service to the City since the formation of 1st Company, District of Montreal Militia in 1764.
Service to Canada and Montreal continues. Lieutenant- Colonel Herb Buhring was the first Canadian Grenadier to be made an Officer of The Order of Military Merit, receiving this distinction during his second tour as The Lieutenant-Colonel. Members of the Regiment participated in Aid of the Civil Power at Oka and Kahnawake in the summer of 1990, and have served with the United Nations Forces in the former Yugoslavia, Cyprus, Egypt, Haiti and on the Golan heights.