The regiment mobilized 'The Lake Superior Regiment, CASF' for active service on 24 May 1940. It was redesignated: '1st Battalion, The Lake Superior Regiment, CASF' on 7 November 1940; and '1st Battalion, The Lake Superior Regiment (Motor), CASF' on 26 January 1942. It embarked for Britain on 22 August 1942. On 26 and 27 July 1944, it landed in France as part of the 4th Armoured Brigade, 4th Canadian Armoured Division, and it continued to fight in North West Europe until the end of the war. The overseas battalion was disbanded on 15 February 1946. Source: Canada.ca