Russian rulers have been a part of the country's history for centuries. CZAR, TSAR, and Tzar are all titles used to refer to the same position, which is the ruler of Russia. Lenin was a revolutionary leader who led the October Revolution in 1917 and became the first leader of the Soviet Union. IVAN was a Russian ruler who reigned from 1533 to 1584 and was known as IVAN the Terrible. Ivani was a short-lived ruler who succeeded IVAN the Terrible in 1584. Stalin was a Soviet leader who served from 1922 to 1953 and is known for his authoritarian rule.