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| - The Aleutians campaign was not considered a priority by the Joint Chiefs of Staff in late 1942. British Prime Minister Churchill stated that sending forces to attack the Japanese presence there was a diversion from the North African Campaign and Admiral Chester Nimitz saw it as a diversion from his operations in the Central Pacific. Commanders in Alaska, however believed the Japanese presence in the Aleutians a threat to North America and once the islands were again in United States hands, forward bases could be established to attack Japan from there. The establishment of Adak Army Airfield (Code Name A-2) in August 1942 gave the Air Force a forward base to attack the Japanese forces on Kiska Island. Amchitka Island, being only 50 miles from Kiska and within range of occupied Attu Island was the next step in the American advance. Enough forces were scraped together from existing units and American forces made an unopposed landing on Amchitka on January 12, 1943, although the destroyer Worden (DD-352) grounded and sank with the loss of 14 lives. Despite facing difficult weather conditions and continual bombing attacks from the Japanese, Army engineers managed to build a runway. As more troops were landed, heavy construction equipment was brought ashore. Frozen lakes were drained and the gravel scraped from their beds was used to lay down the bed for the runway. Navy Seabees also arrived and began to construct the harbor and dock facilities. Finally on 16 February, the construction of the runway at Amchitka (Code Name A-3) had progressed to the point where light fighters could be brought in. 18th Fighter Squadron P-40 Warhawks began to arrive from Adak and surprised the Japanese by launching counter-attacks to their raids from Kiska. Two Japanese light bombers were shot down over the airfield in full view of the construction engineers. In addition to the P-40s, several P-38 Lightnings arrived. With its establishment, the Alaska Command was now away from their target, Kiska. The military eventually built numerous buildings, roads, and a total of three airstrips on the island, some of which would later be renovated and used by the Atomic Energy Commission in the 1960s. At its peak, the occupancy of Amchitka Army Airfield reached 15,000 troops. Known USAAF units assigned to Amchitka AAF were:
* HQ IX Bomber Command, 24 June-4 September 1943
* HQ 343d Fighter Group, 25 July 1943 – 22 January 1944
* 11th Fighter Squadron, 27 March-17 May 1943; 23 March 1944-July 1945 (P-40 Warhawk)
* 18th Fighter Squadron, 15 February 1943 – 28 March 1944 (P-40 Warhawk, P-38 Lightning)
* 54th Fighter Squadron, 12 March-18 October 1943 (P-38 Lightning)
* 344th Fighter Squadron, May–July 1943 (P-40 Warhawk, P-38 Lightning)
* 632d Bombardment Squadron (Dive), 19 July-15 August 1943 (A-24 Banshee)
* 633d Bombardment Squadron (Dive), 19 July-15 August 1943 (A-24 Banshee)
* 635th Bombardment Squadron (Dive), 19 July-15 August 1943 (A-24 Banshee)
* 21st Bombardment Squadron, 18 February–July 1943, (LB-30, B-24 Liberator)
* 36th Bombardment Squadron, 4 May-13 September 1943 (B-24 Liberator)
* 73d Bombardment Squadron, March–April 1943; June-30 August 1943 (B-25 Mitchell, B-26 Marauder)
* 77th Bombardment Squadron, 11 September 1943 – 11 February 1944 (B-25 Mitchell, B-26 Marauder)
* 404th Bombardment Squadron, 4 June 1943 – 26 February 1944 (B-24 Liberator) With the establishment of an American base on Amchitka, the Japanese forces on Kiska Island were put into an untenable situation. The Battle of the Komandorski Islands, fought on 27 March 1943, sealed their fate. The Japanese, in an attempt to reinforce and resupply their garrison on Attu had dispatched three transports which were escorted by nine warships. They were intercepted by United States Naval forces which consisted of One heavy and one light cruisers along with four destroyers. The battle at first was being won by the Japanese, however the Japanese commander lost his nerve when he feared American bombers on Amchitka, based on intercepted American radio signals, were preparing to attack. He ordered his fleet to return to Japan. However, his fears proved groundless as the American aircraft were being prepared for a raid on Kiska island. Without unloading the bombers and adding external tanks, the 73d Bombardment Squadron B-25 Mitchells and B-26 Marauders on Amchitka would have insufficient range to attack the Japanese in the battle area. This amounted to a strategic defeat, as it ended Japanese attempts to resupply the Aleutian garrisons. The Japanese, however, did manage to send a few destroyers and submarines into their bases on Kiska and Attu with supplies and additional troops. The fact was, for all intents and purposes, was that the Americans had essentially isolated the Japanese forces in the Aleutians and their days were numbered. From its bases on Amchitka and Adak, Eleventh Air Force conducted continual bombing raids on the Japanese on Kiska and Attu. Long-range B-24 Liberator heavy bombers were moved down from mainland Alaskan bases to operate in the Aleutians which enabled Air Force commanders to send the bombers with full loads to Attu, while the B-25 and B-26 medium bombers attacked Kiska several times each day. Between 1 April and 11 May, the Eleventh Air Force bombers and fighters, joined by PBYs of Navy Fleet Wing Four reached its highest peak of operational activity during its bombing campaign. Most attacks were directed against Kiska because of Attu being weathered in. The close proximity of Amchitka allowed the fighters to participate in the attacks and run low-level sweeps over the Japanese positioned on Kiska. P-38 Lightnings also carried two 500 pound or occasionally one 1,000 pound bomb and employing glide-bombing tactics went after specific targets such as hangars and fuel tanks; the B-24 bombers dropped their loads on wide area targets. Fighters also carried out attacks using 20 pound fragmentation and incendiary bombs. Air support for the Battle of Attu, which took place from 11–30 May 1943 was carried out from Amchitka. The battle, which lasted for more than two weeks, ended when most of the Japanese defenders were killed in brutal hand-to-hand combat after a final banzai charge broke through American lines. Air attacks on the Japanese on Kiska continued from Adak and Amchitka, with the culmination being the unopposed United States landing on Kiska on 15 August. Due to the heavy casualties suffered at Attu Island, planners were expecting another costly operation. However, incessant and continual air attacks since April had reduced the Japanese forces defenses considerably and the Japanese tactical planners had realized the isolated island was no longer defensible and evacuated the island. The Aleutian Islands campaign was successfully completed on August 24, 1943. In that month, a strategic intercept station was established on the island, which remained until February 1945. Most combat squadrons were withdrawn by early 1944, the 11th Fighter Squadron becoming the headquarters garrison of the base until the end of the war. The mission of Amchitka AAB was that of a communications facility and also refueling for support and combat aircraft headed to and from Alexai Point Army Airfield on Attu and Shemya Army Airfield where long-range B-24 Liberator bombing attacks were carried out on Sakhalin and the Kuril Islands of northern Japan.
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