Akutan Zero

The Akutan Zero, also known as Koga's Zero and the Aleutian Zero, was a type 0 model 21 Mitsubishi A6M Zero Japanese fighter plane that crash-landed on Akutan Island, Alaska Territory, during World War II. It was found intact by the Americans in July 1942 and became the first flyable Zero acquired by the United States during the war. It was repaired and flown by American test pilots. As a result of information gained from these tests, American tacticians were able to devise ways to defeat the Zero, which was the Imperial Japanese Navy's primary fighter plane throughout the war.

The Akutan Zero has been described as "a prize almost beyond value to the United States", and "probably one of the greatest prizes of the Pacific war". Japanese historian Masatake Okumiya stated that the acquisition of the Akutan Zero "was no less serious" than the Japanese defeat at the Battle of Midway, and that it "did much to hasten Japan's final defeat". On the other hand, John Lundstrom is among those who challenge "the contention that it took dissection of Koga's Zero to create tactics that beat the fabled airplane".

The Akutan Zero was destroyed in a training accident in 1945. Parts of it are preserved in several museums in the United States.

The Second Sino-Japanese War began in 1937. Attacks by Chinese fighter planes on Japanese bombers caused the Japanese to develop the concept of fighter escorts. The limited range of the Mitsubishi A5M "Claude" fighter used to escort the bombers caused the Japanese Navy Air staff to commission the Mitsubishi A6M Zero as a long-range land- and carrier-based fighter.

The Zero, which first flew in 1939, was exceedingly agile and lightweight, with maneuverability and range superior to any other fighter in the world at that time. The Zero was superior to any Allied fighter it would encounter for the first two years of the war. To achieve this, however, Japanese engineers had traded off durability. The Zero was very lightly built; it had no armor and no self-sealing fuel tanks. According to American author Jim Rearden, "The Zero was probably the easiest fighter of any in World War II to bring down when hit ... The Japanese ... were not prepared to or weren't capable of building more advanced fighters in the numbers needed to cope with increasing numbers and quality of American fighters". The Zero was the primary Japanese Navy fighter throughout the war. During the war, the Japanese manufactured roughly 10,500 Zeros.

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