The Bell P-39 Airacobra was an early American fighter aircraft at the out break of World War II. In the “Lend-Lease” plan with eh Soviet Union, the P-39 was one of their favorite fighters as it had more victories than any other American aircraft that was sold to the USSR.
The British RAF and the Italian Air Force (after the fall of Fascist Italy) were also users of this aircraft. It was the first American Fighter to have tricycle landing gear. The unique feature was the engine was in the center of the fuselage behind the pilot.
Due to a lack of a turbo-supercharger, it was not a good high altitude aircraft. The Soviets liked it because they used it for medium to low altitude combat every effectively. It was a deadly ground attack fighter with a deadly nose cannon.