The development of the tsar's autocratic powers reached a peak during the reign of Ivan IV, and he became known as the Terrible (his Russian epithet, groznyy
, means threatening or dreaded). Ivan strengthened the position of the tsar to an unprecedented degree, demonstrating the risks of unbridled power in the hands of a mentally unstable individual. Although apparently intelligent and energetic, Ivan suffered from bouts of paranoia and depression, and his rule was punctuated by acts of extreme violence.
Ivan IV became grand prince of Muscovy in 1533 at the age of three. Various factions of the boyars (see Glossary) competed for control of the regency until Ivan assumed the throne in 1547. Reflecting Muscovy's new imperial claims, Ivan's coronation as tsar was an elaborate ritual modeled after those of the Byzantine emperors. With the continuing assistance of a group of boyars, Ivan began his reign with a series of useful reforms. In the 1550s, he promulgated a new law code, revamped the military, and reorganized local government. These reforms undoubtedly were intended to strengthen the state in the face of continuous warfare.
During the late 1550s, Ivan developed a hostility toward his advisers, the government, and the boyars. Historians have not determined whether policy differences, personal animosities, or mental imbalance cause his wrath. In 1565 he divided Muscovy into two parts: his private domain and the public realm. For his private domain, Ivan chose some of the most prosperous and important districts of Muscovy. In these areas, Ivan's agents attacked boyars, merchants, and even common people, summarily executing some and confiscating land and possessions. Thus began a decade of terror in Muscovy. As a result of this policy, called the oprichnina
, Ivan broke the economic and political power of the leading boyar families, thereby destroying precisely those persons who had built up Muscovy and were the most capable of administering it. Trade diminished, and peasants, faced with mounting taxes and threats of violence, began to leave Muscovy. Efforts to curtail the mobility of the peasants by tying them to their land brought Muscovy closer to legal serfdom. In 1572 Ivan finally abandoned the practices of the oprichnina
Despite the domestic turmoil of Ivan's late period, Muscovy continued to wage wars and to expand. Ivan defeated and annexed the Kazan' Khanate on the middle Volga in 1552 and later the Astrakhan' Khanate, where the Volga meets the Caspian Sea. These victories gave Muscovy access to the entire Volga River and to Central Asia. Muscovy's eastward expansion encountered relatively little resistance. In 1581 the Stroganov merchant family, interested in fur trade, hired a Cossack (see Glossary) leader, Yermak, to lead an expedition into western Siberia. Yermak defeated the Siberian Khanate and claimed the territories west of the Ob' and Irtysh rivers for Muscovy (see fig. 3).
Expanding to the northwest toward the Baltic Sea proved to be much more difficult. In 1558 Ivan invaded Livonia, eventually embroiling him in a twenty-five-year war against Poland, Lithuania, Sweden, and Denmark. Despite occasional successes, Ivan's army was pushed back, and Muscovy failed to secure a coveted position on the Baltic Sea. The war drained Muscovy. Some historians believe that Ivan initiated the oprichnina
to mobilize resources for the war and to quell opposition to it. Regardless of the reason, Ivan's domestic and foreign policies had a devastating effect on Muscovy, and they led to a period of social struggle and civil war, the so-called Time of Troubles (Smutnoye vremya, 1598-1613).