Initially, Ottoman conquests in Europe made significant gains with a decisive victory at Mohács reducing around one third (central) part of Kingdom of Hungary to the status of an Ottoman tributary. Later, the Peace of Westphalia and the Spanish War of Succession in the 17th and 18th centuries respectively left the Austrian Empire as the sole firm possession of the House of Habsburg. After the siege of Vienna in 1683, the Habsburgs assembled a large coalition of European powers known as the Holy League, allowing them to fight the Ottomans and to regain control over Hungary. The Great Turkish War ended with the decisive Holy League victory at Zenta. The wars ended after Austria's participation in the war of 1787-1791, which Austria fought allied with Russia. Intermittent tension between Austria and the Ottoman Empire continued throughout the nineteenth century, but they never fought each other in a war and ultimately found themselves allied in World War I, in the aftermath of which both empires were dissolved.