N'etiti afọ 1942, ndị agha mmiri Japan mere atụmatụ ịwakpo Alaska nakwa agwaetiti Midway.
n'ebe etiti Pacific. Mwakpo ndị Japan na Northern Area Fleet na Dutch Harbor na Adak Island rụpụtara na Aleutian Islands Campaign. Mana n'ihi na United States Naval intelligence mebiri koodu nzuzo nke ndị agha mmiri Japan, Admiral Nimitz, Onye isi ndị ọchịagha nke Oke Osimiri Pacific na Hawaii, matara atụmatụ ndị Japan site na 21 Mee 1942. Ka ọ na-erule 1 June 1942, ndị agha United States nọ na Alaska dị ndị agha 45,000. N'ụbọchị ahụ, ndị XI Intercepter Command, bụ ndị e mere ka ha rụọ ọrụ na mbụ, na Machị, ka a kpọrọ ndị XI Fighter Command. Agbanyeghị, ike ọrụ nke Eleventh Air Force pere mpe. O nwere 10 B-17 Flying Fortress bombers na 34 B-18 Bolo bombers na Elmendorf Airfield, na 95 P-40 Warhawk fighters kewara n'etiti Fort Randall AAF na Cold Bay na Fort Glenn AAF na Umnak.