The siege of Belgrade was a successful attempt by Austrian troops under the command of Prince Eugene of Savoy to capture the strategically important city of Belgrade from the Ottoman Empire. It took place during the Seventh OttomanVenetian War (17141718), barely a year after the Austrian victory at the Battle of Petrovaradin (Peterwardein). The Austrians routed the Ottoman relief army under Grand Vizier Hac Halil Pasha on 16 August. As a consequence, the Belgrade garrison, deprived of relief, surrendered to the Austrians on 21 August. The Ottoman Sultan Ahmed III sued for peace, resulting in the Treaty of Passarowitz a year later, which completed the transfer of the remainder of Hungary, the Banat and the city of Belgrade into Austrian hands.



The Austro-Turkish War (1716-1718) was fought between the Habsburg Monarchy and the Ottoman Empire. The 1699 Treaty of Karlowitz was not an acceptable permanent agreement for the Ottoman Empire. Twelve years after Karlowitz, it began the long-term prospect of taking revenge for its defeat at the Battle of Vienna in 1683. First, the army of Turkish Grand Vizier Baltacı Mehmet defeated Peter the Great's Russian Army in the Russo-Turkish War (1710–1711). Then, during the Ottoman–Venetian War (1714–1718), Ottoman Grand Vizier Damat Ali reconquered the Morea from the Venetians. As a reaction as the guarantor of the Treaty of Karlowitz, the Austrians threatened the Ottoman Empire, which caused it to declare war in April 1716.In 1716, Prince Eugene of Savoy defeated the Turks at the Battle of Petrovaradin. The Banat and its capital, Timişoara, were conquered by Prince Eugene in October 1716. The following year, after the Austrians captured Belgrade, the Turks sought peace, and the Treaty of Passarowitz was signed on 21 July 1718.The Habsburgs gained control of Belgrade, Temesvár (the last Ottoman fortress in Hungary), the Banat region, and portions of northern Serbia. Wallachia (an autonomous Ottoman vassal) ceded Oltenia (Lesser Wallachia) to the Habsburg Monarchy, which established the Banat of Craiova. The Turks retained control only of the territory south of the Danube River. The pact stipulated for Venice to surrender the Morea to the Ottomans, but it retained the Ionian Islands and made gains in Dalmatia.