An army of 21,000 Bohemians and mercenaries under Christian of Anhalt was defeated by 23,000 men of the combined armies of Ferdinand II, Holy Roman Emperor, led by Charles Bonaventure de Longueval, Count of Bucquoy, and the German Catholic League under Maximilian I, Elector of Bavaria and Johann Tserclaes, Count of Tilly, at Bílá Hora ("White Mountain") near Prague. Bohemian casualties were not severe but their morale collapsed and Imperial forces occupied Prague the next day.