Ivan succeeded his father Vasily III, who died in 1533, under the regency of his mother. When she died (1538), the regency alternated among several feuding boyar families (see boyars). Boyar rule ended only in 1546, when Ivan announced his intention of becoming czar. He was crowned in 1547. As czar, Ivan attempted to establish czarist autocracy at the expense of boyar power. In the early years of his reign, he reduced the arbitrary powers of the boyar provincial governors, transferring their functions to locally elected officials. The former boyars' council was replaced by a "chosen council" consisting of members who owed their status to the czar.
In 1566, Ivan summoned what was probably the first general council of the realm ( Zemsky Sobor ), composed of representatives of different social ranks, including merchants and lower nobility. After reorganizing the army, Ivan conquered Kazan (1552) and Astrakhan (1556), thereby inaugurating Russia's eastward expansion. The conquest of Siberia by the Cossack Yermak took place late in his reign (1581–83). Ivan also began trade with England via the White Sea in the mid-1550s. To improve his access to the Baltic Sea, he undertook (1558) a campaign against Livonia. In the resulting war with Poland and Sweden, he was at first successful but was later defeated by Stephen báthory, king of Poland and Lithuania. The peace treaties (1582, 1583) forced the czar to renounce his territorial gains and cede additional territory to Sweden.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.