Which 1620 battle decisively defeated the Bohemian rebels?

The Battle of White Mountain decisively defeated the Bohemian rebels on 8 November 1620. Fought outside Prague, the battle ended the Bohemian Revolt and secured the early Habsburg victory in the Thirty Years’ War.

The rebellion began in 1618 after Bohemian Protestant nobles rebelled against the Catholic Habsburg ruler Ferdinand II, an uprising famously triggered by the Defenestration of Prague. The rebels later chose Frederick V of the Palatinate as their king, but Ferdinand assembled Imperial and Catholic League forces under commanders including Johann Tserclaes, Count of Tilly, and Charles Bonaventure de Longueval, Count of Bucquoy.

The Protestant army held a defensive position on White Mountain, a low plateau near Prague. Poor morale, inadequate preparation, and the superior cohesion of the Imperial forces helped produce a rapid defeat; the battle itself lasted roughly an hour. Frederick fled and became known as the “Winter King.” The victory led to executions, confiscations, exile, and a long period of Catholic re-Catholicization in the Czech lands.