On August 7, 1943, an invasion force of 34,426 Allied troops landed on Kiska. The Canadians primarily came from the 13th Canadian Infantry Brigade of the 6th Canadian Infantry Division. The Canadian forces also included the Canadian component of the First Special Service Force.
The invasion force landed only to find the island abandoned. Under the cover of fog, the Japanese had successfully removed their troops on July 28 without the Allies noticing. Allied casualties during the operation nevertheless numbered 313. All of these casualties were the result of friendly fire, booby traps set out by the Japanese, disease, or frostbite.