 It was redesignated as the Irish Regiment of Canada, CASF on 12 August 1940; and as the 1st Battalion, The Irish Regiment of Canada, CASF on 7 November 1940.It embarked for Great Britain on 28 October 1942.It landed in mainland Italy on 10 November 1943, as part of the 11th Infantry Brigade, 5th Canadian Armoured Division.