Yes, the Aleutian Campaign was real... Japanese Forces occupied the Aleutian Islands of Attu and Kiska in June 1942. Kiska was occupied on 6 JUne, and Attu on 7 June. US (and some Canadian) forces began an attempt to dislodge them in May-August 1943. As part of this attack, the Japanese sent a Naval Task Force including two aircraft carriers into the Aleutian Chain and bombed the US Naval Base at Dutch Harbor. The Japanese successfully evacuated Kiska, and were fought to eliminate them from Attu, where one of the largest "Banzai" charges of the war took place. The Aleutian Campaign is little known, and was overshadowed in public and military recognition by the Battle of Guadalcanal, which occurred simultaneously, but it was definitely combat-- in Rugged and miserable terrain, with inadequate equipment and clothing. For more information on this part of WW2, I strongly recommend Brian Garfield's "The Thousand Mile War".