The Ilyushin Il-2 (Cyrillic: Илью́шин Ил-2) Shturmovik (Cyrillic: Штурмови́к, Shturmovík) is a ground-attack aircraft produced by the Soviet Union in large numbers during the Second World War. The Il-2 was never given an official name and 'shturmovik' is the generic Russian word meaning ground attack aircraft. The word also appears in Western sources as Stormovik and Sturmovik, neither of which give correct pronunciation in English. The Il-2 is a single-engine, propeller-driven, low-wing monoplane of mixed construction with a crew of two (one in early versions), specially designed for assault operations. Its most notable feature was the inclusion of armor in an airframe load-bearing scheme. Armor plates replaced the frame and paneling throughout the nacelle and middle part of the fuselage, and an armored hull made of riveted homogeneous armor steel AB-1 (AB-2) secured the aircraft's engine, cockpit, water and oil radiators, and fuel tanks. In early 1941, the Il-2 was ordered into production at four factories, and was eventually produced in greater numbers than any other military aircraft in aviation history, but by the time Nazi Germany invaded the Soviet Union on 22 June 1941, only State Aviation Factory 18 at Voronezh and Factory 381 at Leningrad had commenced production, with 249 having been built by the time of the German attack. For more details on development, operational history and 12 variants, click here.