Siege of Belgrade
In 1788, Koča's frontier rebellion saw eastern Šumadija occupied by Austrian Serbian freikorps and hajduks. From 1788–91, Belgrade was again under Austrian rule after Koča's rebellion. The Siege of Belgrade from 15 September to 8 October 1789, a Habsburg Austrian force besieged the fortress of Belgrade. The Austrians held the city until 1791 when it handed Belgrade back to the Ottomans according to the terms of the Treaty of Sistova.