Reign of Sigismund II Augustus (1550s)

Timeline

1. 1550–1559Kraków · Lesser PolandSigismund II convened the Sejm multiple times to discuss taxation, the military, and succession, attempting to strengthen royal authority but repeatedly blocked by the magnates. The issue of the Reformation continued to ferment throughout the 1550s, and the king maintained a relatively tolerant stance among the confessions.
2. 1558–1559Vilnius · LithuaniaAfter Ivan IV invaded Livonia in 1558, Poland–Lithuania gradually intervened militarily. Sigismund II coordinated noble coalitions and diplomacy in an attempt to prevent Muscovy from controlling the eastern Baltic coast, as the balance of power in northeastern Europe entered a long period of reorganization.