In the year following, 1717, another large army was sent from Constantinople to the Danube, under Grand Vizier Khalil, who had succeeded Damad after the battle of Peterwardein. It consisted of a hundred and fifty thousand men, of whom eighty thousand were Janissaries and Spahis. It was no more fortunate than that under Damad in the previous year. Prince Eugène, still in command of the Austrians, had opened the campaign by marching to Belgrade with a force of not more than seventy thousand men. He besieged the city and fortress, which was garrisoned by thirty thousand Ottomans. When, after three weeks of siege, the Ottoman army came in sight, so vastly superior in numbers, the position of Eugène was most critical. The garrison of Belgrade was in front of him and Khalil’s army, double in number of his own, threatened his rear. It is highly probable that if the Ottoman general had attacked the Austrians without delay he would have been successful. He hesitated and delayed. He ended by an effort to besiege the besiegers. He entrenched his army in the rear of that of Eugène. The two armies then fired their heavy guns on one another without much result. The Turks were greatly superior in this respect. They were provided with a hundred and forty guns and thirty-five mortars. Failure of food would have compelled the Turks to an issue. But Prince Eugène anticipated this by making an attack himself on the Ottoman lines. Never was a bolder course attempted by a general, and never was there a more brilliant success. With greatly inferior force, the Austrians stormed the Turkish lines on August 16, 1717, little more than a year from the day on which the battle of Peterwardein had been fought. The Ottomans gave way along their whole line. Twenty thousand of them were killed or wounded, while the loss of the Austrians in killed was no more than two thousand. Prince Eugène himself was wounded for the thirteenth time in his great career. The Turks retreated in disorder. They lost a hundred and thirty-one guns and thirty-five mortars and a vast supply of munitions. On the following day Belgrade and its garrison of thirty thousand men surrendered. After the battle before Belgrade and the capture of that fortress, the Austrians advanced and occupied a great part of Serbia and Western Wallachia. They appealed to the Serbian people to rise against their Ottoman masters, but not more than twelve hundred answered the appeal and joined the Austrian army. There was no desire on the part of the Serbians to exchange Turkish for Austrian rule. The occupation by the Austrians of territory south of the Danube proved to be temporary. Twenty-two years later the Ottomans recaptured Belgrade and drove the Austrians from Serbia.