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The Aleutian Islands Campaign was a struggle over the Aleutian Islands, part of the Alaska Territory, in the American theater and the Pacific theater of World War II starting on 3 June 1942. A small Japanese force occupied the islands of Attu and Kiska, but the remoteness of the islands and the difficulties of weather and terrain meant that it took nearly a year for a far larger U.S./Canadian force to eject them. The islands' strategic value was their ability to control Pacific Great Circle routes. This control of the Pacific transportation routes is why U.S. General Billy Mitchell stated to the U.S. Congress in 1935, "I believe that in the future, whoever holds Alaska will hold the world. I think it is the most important strategic place in the world." The Japanese reasoned that control of the Aleutians would prevent a possible U.S. attack across the Northern Pacific. Similarly, the U.S. feared that the islands would be used as bases from which to launch aerial assaults against the West Coast. A battle to reclaim Attu was launched on May 11, 1943 and completed following a final Japanese banzai charge on May 29. On 15 August 1943, an invasion force landed on Kiska in the wake of a sustained three-week barrage, only to discover the Japanese had abandoned the island on July 29. The battle is known as the "Forgotten Battle", due to being overshadowed by the simultaneous Guadalcanal Campaign. In the past, many western military historians believed it was a diversionary or feint attack during the Battle of Midway meant to draw out the U.S. Pacific Fleet from Midway Atoll, and was in fact launched simultaneously under the same overall commander, Isoroku Yamamoto. However, historians Jonathan Parshall and Anthony Tully have made an argument against this interpretation, stating that the Japanese invaded the Aleutians to protect the northern flank of their empire and did not intend it as a diversion. ==Japanese attack== Before Japan entered World War II, its Navy had gathered extensive information about the Aleutians, but it had no up-to-date information regarding military developments on the islands. Admiral Isoroku Yamamoto provided the Japanese Northern Area Fleet, commanded by Vice-Admiral Boshiro Hosogaya, with a force of two aircraft carriers, five cruisers, twelve destroyers, six submarines, and four troop transports, along with supporting auxiliary ships. With that force, Hosogaya was first to launch an air attack against Dutch Harbor, then follow with an amphibious attack upon the island of Adak, 480 miles to the west. Hosogaya was instructed to destroy whatever American forces and facilities were found on Adak—the Japanese did not know the island was undefended. Hosogaya's troops were to return to their ships and become a reserve for two additional landings: the first on Kiska, 240 miles west of Adak, the other on the Aleutians' westernmost island, Attu, 180 miles west from Kiska. Because United States Naval Intelligence had broken the Japanese naval codes, Admiral Chester Nimitz had learned by May 21 of Yamamoto's plans, including the Aleutian diversion, the strength of both Yamamoto's and Hosogaya's fleets, and that Hosogaya would open the fight on 1 June or shortly thereafter. As of June 1, 1942, United States military strength in Alaska stood at 45,000 men, with about 13,000 at Cold Bay (Fort Randall) on the tip of the Alaskan Peninsula and at two Aleutian bases: the naval facility at Dutch Harbor on Unalaska Island, 200 miles west of Cold Bay, and the recently built Fort Glenn Army Airfield 70 miles west of the naval station on Umnak Island. Army strength, less air force personnel, at those three bases totaled no more than 2,300, composed mainly of infantry, field and antiaircraft artillery troops, and a large construction engineer contingent, which was used in the construction of bases. The Army Air Force's Eleventh Air Force consisted of 10 B-17 Flying Fortress heavy bombers and 34 B-18 Bolo medium bombers at Elmendorf Airfield, and 95 P-40 Warhawk fighters divided between Fort Randall AAF at Cold Bay and Fort Glenn AAF on Umnak. The naval commander was Rear Admiral Robert A. Theobald, commanding Task Force 8 afloat, who as Commander North Pacific Force (ComNorPac) reported to Admiral Nimitz in Hawaii. Task Force 8 consisted of five cruisers, thirteen destroyers, three tankers, six submarines, as well as naval aviation elements of Fleet Air Wing Four.〔http://www.navweaps.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Midway.htm, and http://www.ibiblio.org/hyperwar/USN/Aleutians/USN-CN-Aleutians-3.html#page22, accessed November 2011〕 When the first signs of a possible Japanese attack on the Aleutians were known, the Eleventh Air Force was ordered to send out reconnaissance aircraft to locate the Japanese fleet reported heading toward Dutch Harbor and attack it with bombers, concentrating on sinking Hosogaya's 2 aircraft carriers. Once the enemy planes were removed, Naval Task Force 8 would engage the enemy fleet and destroy it. On the afternoon of 2 June, a naval patrol plane spotted the approaching Japanese fleet, reporting its location as 800 miles southwest of Dutch Harbor. Eleventh Air Force was placed on full alert. Shortly thereafter bad weather set in, and no further sightings of the fleet were made that day. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aleutian Islands Campaign」の詳細全文を読む スポンサード リンク
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