They were the only part of the continental territory of the United States to be occupied by the enemy during the war .
During World War II , two of the outer Aleutian Islands -- Attu and Kiska -- were invaded and occupied by Japanese troops .
two were the only part of the continental territory of the United States to be occupied by the enemy during the war .
During World War II , two of the outer Aleutian Islands -- Attu and Kiska -- were invaded and occupied by Japanese troops .