Shoulder title Royal 22e Régiment de Canada

The Royal 22nd Regiment, in French and officially (in both French and English usage Royal 22^e Régiment and colloquially The Van Doos (ananglicized pronunciation of the first two syllables of vingt-deuxième, "22nd" in French), is an infantry regiment of the Canadian Army. The mostly francophone regiment comprises three Regular Force battalions, two Primary Reservebattalions, and a band, making it the largest regiment in the Canadian Army. 

The Royal 22^e Régiment was placed on active service on 1 September 1939 as the Royal 22^e Régiment, CASF, embarked for Great Britain on 9 December 1939. The regiment landed in Sicily on 10 July 1943 and in Italy on 3 September 1943 as part of 3rd Brigade, 1st Canadian Infantry Division. On 16 March 1945, the regiment moved with the 1st Canadian Corps as part of OPERATION GOLDFLAKE to North-West Europe, where it fought until the end of the war. The overseas regiment was disbanded on 1 March 1946.

On 1 June 1945, a second Active Force component of the regiment was mobilized for service in the Pacific theatre of operations as the 1st Canadian Infantry Battalion (Royal 22^e Régiment), CASF. It was redesignated the 2nd Battalion (Royal 22^e Régiment), CIC on 2 September 1945 and the Royal 22^e Régiment, CIC on 1 March 1946. On 27 June 1946, it was embodied in the Permanent Force.

Details of Le Régiment de Châteauguay (Mitrailleuses) were called out on service on 26 August 1939 and then placed on active service on 1 September 1939, as Le Régiment de Châteauguay (Mitrailleuses), CASF (Details), for local protection duties. The details called out on active service were disbanded on 31 December 1940. The regiment subsequently mobilized the '1st Battalion, Le Régiment de Châteauguay (Mitrailleuses), CASF for active service on 18 March 1942. It was redesignated as the 1st Airfield Defence Battalion (Le Régiment de Châteauguay) (Mitrailleuses), CIC, CASF on 19 July 1943, the 1st Airfield Defence Battalion (Le Régiment de Châteauguay), CIC, CASF on 1 January 1944 and the 1st Battalion, Le Régiment de Châteauguay, CIC, CASF on 1 September 1944. This unit served in Canada in a home defence role as part of the 7th Canadian Division, and three companies of this unit served in Newfoundland. On 10 January 1945, it embarked for Great Britain, where it was disbanded on 18 January 1945 to provide reinforcements to the Canadian Army in the field.

Details from Le Régiment de St. Hyacinthe were called out on service on 26 August 1939 and then placed on active service on 1 September 1939 as Le Régiment de St. Hyacinthe, CASF (Details), for local protection duties. The details called out on active service were disbanded on 31 December 1940. The regiment subsequently mobilized the1st Battalion, Le Régiment de St. Hyacinthe, CASF for active service on 3 January 1942. This unit served in Canada in a home defence role as part of Atlantic Command and in Newfoundland from April 1943 to September 1944. The battalion was disbanded on 14 January 1946.