After the last-minute relief of Vienna from a siege and the imminent seizure by a Turkish force in 1683, the combined troops of the Holy League, that had been founded the following year, embarked on the military containment of the Ottoman Empire and reconquered Hungary in 1687. The Papal States, the Holy Roman Empire, the Polish–Lithuanian Commonwealth, the Republic of Venice and since 1686 Russia had joined the league under the leadership of Pope Innocent XI. Prince Eugene of Savoy, who served under emperor Leopold I, took supreme command in 1697 and decisively defeated the Ottomans in a series of spectacular battles and