The IS-2 is the quintessential Soviet heavy tank from World War 2. Heavily armored and boasting a fearsome 122mm gun, this tank matched the German panzers on the Eastern front by more than just its fierce appearance. This tank's history is told from the beginning of the Soviet heavy tank programme until the very end of World War 2, in the most detailed and complete account of its development, design and production available in English. Supported by extensive research of Russian language sources, this publication includes a comprehensive breakdown of prototypes, the Soviet analysis of weaknesses in German tanks including the Tiger and Panther, the development of the 122mm gun, the principles of the new tank's armor layout and a wealth of technical data.