The Bohemian Revolt was a conflict that began in 1618 when Protestant nobles in Bohemia opposed the Catholic Habsburg rule. This revolt was part of the larger Thirty Years' War, which involved many European powers. The initial spark was the Defenestration of Prague, where two Habsburg officials were thrown out of a window, symbolizing the nobles' resistance. The revolt led to a series of battles and political struggles, ultimately resulting in the defeat of the Bohemian forces at the Battle of White Mountain in 1620. This defeat solidified Habsburg control over Bohemia and marked a significant moment in the decline of Protestantism in the region.