Japan attacks the Aleutian Islands at Dutch Harbor, Alaska. Japanese Admiral Yamamoto provided the Northern Area Fleet, commanded by Vice Adm. Boshiro Hosogaya, with a force of 2 small aircraft carriers, 5 cruisers, 12 destroyers, 6 submarines, and 4 troop transports, along with supporting auxiliary ships. US Coastal defenses from the Aleutians to Panama are put on full alert.
Navy engaged the Japanese in the Battle of Komandorskies, 150 miles west of Cape Wrangell, Alaska, with 3 big transports loaded with supplies escorted by 4 heavy cruisers and 4 destroyers. This is the largest sea fight of the Aleutians. B-25 Mitchell Bombers attack Japanese positions on Kiska, in the Aleutian Islands.
Attu (in the Aleutian Islands) is back in US hands. 2,351 enemy dead, a few hundred were presumed to have been buried in the hills. Japanese surrender. Out of a U.S. force that totaled more than 15,000 men, 549 U.S. had been killed, 1,148 U.S. wounded, 2,100 U.S. men taken out of action by disease and nonbattle injuries.