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. This type of airplane was the Imperial Japanese Navy's most common fighter plane during World War 2. It crashed on Akutan Island, Alaska Territory, during June 1942. It was the first flyable Zero that the United States got during the war. The Americans fixed the plane and test pilots flew it to find out how it worked. American tacticians were able to find ways to defeat the Zero.