On August 15, 1943, an invasion force consisting of 34,426 Allied troops, including elements of the 7th Infantry Division, 4th Infantry Regiment, 87th Mountain Infantry Regiment, 5,300 Canadians (mainly the 13th Canadian Infantry Brigade from the 6th Infantry Division, with supporting units including two artillery units from the 7th Infantry Division), 95 ships including three battleships and a heavy cruiser, and 168 aircraft landed on Kiska, only to find the island completely abandoned.