Great War Details of the 54th Regiment "" were called out on active service on 6 August 1914 for local protection duties. The
163rd Battalion (French-Canadian), CEF was authorized on 22 December 1915 and embarked for Bermuda on 26 May 1916 for garrison duty. It sailed from Canada for Great Britain on 27 November 1916 where it was absorbed by the 10th Reserve Battalion, CEF, on 8 January 1917 to provide reinforcements for the Canadian Corps in the field. The battalion disbanded on 15 September 1917.
Second World War , in conjunction with The Sherbrooke Regiment (Machine Gun) (now
The Sherbrooke Hussars), mobilized The Sherbrooke Fusiliers Regiment, CASF, for active service on 24 May 1940. The name Fusilier was plural initially but subsequently changed to singular. It was redesignated as the 1st Battalion, The Sherbrooke Fusiliers Regiment, CASF, on 7 November 1940 and as the 1st Battalion, The Sherbrooke Fusilier Regiment, CASF, on 15 November 1940. The 1st Battalion was converted to an armoured regiment on 26 January 1942 and designated as the 27th Armoured Regiment (The Sherbrooke Fusilier Regiment), CAC, CASF. By this time the name
Fusilier was singular. It was redesignated as the 27th Armoured Regiment (The Sherbrooke Fusilier Regiment), RCAC, CASF, on 2 August 1945. The regiment served in Newfoundland on garrison duty from 13 August 1941 to 15 February 1942, and embarked for Great Britain on 27 October 1942. On D-Day, 6 June 1944, it landed in Normandy, France as part the 2nd Canadian Armoured Brigade, and it continued to fight in North West Europe until the end of the war. The overseas regiment was disbanded on 15 February 1946. The regiment subsequently mobilized the 1st Battalion, , CASF, for active service on 18 March 1942. It served in Canada in a home defence role as part of the 15th Infantry Brigade,
7th Canadian Division and the 14th Infantry Brigade,
6th Canadian Division. Between September 30, 1942, and October 13, 1943, , CASF, was stationed at
Camp Debert, Nova Scotia. On 10 January 1945, it embarked for Great Britain, where it was disbanded for reinforcements on 18 January 1945.
Afghanistan The regiment contributed an aggregate of more than 20% of its authorized strength to the various task forces which served in Afghanistan between 2002 and 2014. ==Regimental band==