On June 1, 1945, a new battalion of the regiment was authorized to be part the Canadian Pacific Force in the campaign against Japan. Its official designation was 1st Canadian Infantry Battalion, Princess Patricia's Canadian Light Infantry, 2nd Canadian Infantry. After the destruction of Hiroshima and Nagasaki by American atomic bombs and Japan's subsequent surrender on August 15, 1945, the Pacific Force was disbanded. On September 2, the new battalion was renamed "2nd Battalion, Princess Patricia's Canadian Light Infantry, Canadian Infantry Corps" and became a component of the interim force, waiting for the formation of a permanent force.