Danube. However, harassment by the forces of the Crimean Khanate, a major Ottoman vassal which supplied the Ottoman army with light cavalry, and his failure to find enough food for his troops prevented him from achieving this objective. Consequently, the Ottoman army succeeded in crossing the Danube without opposition. Siege of Brăila As the Russo-Moldavian army moved along the Prut, a portion of the Russian army under General Carl Ewald von Rönne moved towards Brăila, a major port town located on the left bank of the Danube (in Wallachia) but administered directly by the Ottomans as a kaza. The Russian army met with a portion of the Wallachian army commanded by Spatharios (the second-highest military commander after the ruler) Toma Cantacuzino, who disobeyed the orders of the ruler Constantin Brâncoveanu and joined the Russians. The two armies assaulted and conquered Brăila after a two-day siege (13–14 July 1711). Battle of Stănilești Peter and Cantemir concentrated their troops on the right bank of the Prut, across the river from the Ottomans. On 19 July, Ottoman janissaries and Tatar light cavalry crossed the Prut, by swimming or by boat, driving back the Russian advance guard. This allowed the remainder of the Ottoman army to build pontoon bridges and cross the river. Peter tried to bring up the main army to relieve the advance guard, but the Ottomans repulsed his troops. He withdrew the Russo-Moldavian army into a defensive position at Stănilești, where they entrenched. The Ottoman army rapidly surrounded this position, trapping Peter's army. The janissaries repeatedly attacked, but were repulsed, suffering about 8.000 casualties. However, the Ottomans bombarded the Russo-Moldavian camp with artillery, preventing them from reaching the Prut for water. Starving and thirsty, Peter was left with no choice but to sign a peace on Ottoman terms, which he duly did on 22 July. Peace treaty The conflict was ended on 21 July 1711 by the Treaty of the Pruth, to the disappointment of Charles XII. The Treaty, reconfirmed in 1713 through the Treaty of Adrianople (1713), stipulated the return of Azov to the Ottomans; Taganrog and several Russian fortresses were to be demolished; and the Tsar pledged to stop interfering in the affairs of the Polish–Lithuanian Commonwealth. The Ottomans also demanded that Charles XII be granted safe passage to Sweden and asked the Tsar to hand over Cantemir. Although Peter acquiesced to all demands, he refused to fulfill the