General Secretary of the Communist Party of the Soviet Union more than determine party membership composition. Stalin, its first incumbent, used the principles of democratic centralism to transform his office into that of party leader, and later leader of the Soviet Union. In 1934, the 17th Party Congress refrained from formally re-electing Stalin as General Secretary. However, Stalin was re-elected into all other positions and remained leader of the party without diminishment. In the 1950s, Stalin increasingly withdrew from Secretariat business, leaving the supervision of the body to Georgy Malenkov, possibly to test him as a potential successor. In October 1952, at the 19th Party Congress, Stalin restructured the party's
Tanks in the Soviet Union guns or heavier armour but served as a basis for the later Iosif Stalin heavy tank. The Iosif Stalin tank (or IS tank, named after the Soviet leader Joseph Stalin) was a heavy tank developed by the Soviet Union during World War II. The tanks in the series are also sometimes called JS or ИС tanks. The heavy tank was designed with thick armour to counter the German 88 mm guns, and carried a main gun that was capable of defeating the German Tiger and Panther tanks. It was mainly a breakthrough tank, firing a heavy high-explosive shell that was