It was reconverted back to infantry on 12 April 1944 and redesignated as the First Army Headquarters Defence Company (Royal Montreal Regiment), CASF, and on 5 April 1945 as the First Canadian Army Headquarters Defence Battalion (Royal Montreal Regiment), CASF.

On 27 June 1944, it landed in France as a unit of First Canadian Army Troops, and it continued to serve in North West Europe until the end of the war.

It was redesignated the 6th Canadian Infantry 2-2-262 Division Reconnaissance Troop (The Royal Montreal Regiment), RCAC, CASF on 2 August 1945.

[1]Honorary distinction: Second World War badge of the Canadian Armoured Corps borne on the regimental colour and appointments, for service with that arm Argent an autumnal maple leaf proper inscribed ROYAL MONTREAL REGT in letters Or within a belt Azure edged, buckled and inscribed HONI SOIT QUI MAL Y PENSE in letters Or ensigned by the Royal Crown proper and set above a scroll Azure edged and inscribed CANADA in letters Or

“ROYAL MONTREAL REGT” is a form of the regimental title and “HONI SOIT QUI MAL Y PENSE” is the motto of the regiment.Housing The Royal Montreal Regiment, this two-storey, red brick building in a residential neighbourhood is set in landscaped grounds planted with mature trees.

The mission of the museum is to collect, preserve, research and photograph material relating to the history of the Royal Montreal Regiment, its former members and its site, and, through the appropriate display of such items, to convey this history to the currently serving members, the broader Canadian Forces community and the public.