Livonian campaign of Stephen Báthory begins.

The Livonian campaign of Stephen Báthory took place in the final stage of the Livonian War, between 1577 and 1582. Polish–Lithuanian forces led by Stephen Báthory successfully fought against the army of Russian tsar Ivan IV over the Duchy of Livonia and Polotsk. Russian forces were expelled from Livonia before the campaign was concluded by the Truce of Jam Zapolski.