Cap badge Fort Gary Horse, 3rd Canadian Division PW

The formation of the 3rd Canadian Infantry Division was authorized during the Second World War on 17 May 1940. There was then a considerable delay until the brigade and divisional headquarters were formed on 5 September, and the first divisional commander was appointed on 26 October.

While the division’s components were forming, The Cameron Highlanders of Ottawa was detached and transferred to Iceland as part of Z Force. The battalion spent the winter of 1940–41 there, then moved to the United Kingdom. The division's 8th and 9th Canadian Infantry Brigades began embarking as early as 1 July 1941 and arrived in the United Kingdom at the end of that month. The 7th Canadian Infantry Brigade embarked in August and arrived at the beginning of September. After its arrival, the division spent three uneventful years in garrison and training duties prior to the assault landing on Juno Beach on D-Day, 6 June 1944, as part of the British Second Army, later joining the newly formed First Canadian Army. Battle honours include Caen, Falaise, clearing the Channel ports, the Breskens pocket, and the final offensives of 1945. During the Battle of the Scheldt, the 3rd Canadian Infantry Division had the nickname of "Water Rats" bestowed upon them by Field Marshal Sir Bernard Montgomery, commanding 21st Army Group, in recognition of the poor conditions of terrain through which they fought, first in the Normandy landings, and then in the flooded Breskens Pocket