In 1788, Koča's frontier rebellion saw most of Šumadija occupied by the Serbian Free Corps, a volunteer militia loyal to the Austrians. Belgrade was besieged by Austrian forces in late 1789, occupied until 1791 when it was handed back to the Caliphate after concluding peace.
In 1788, Koča's frontier rebellion resulted in most of Šumadija being controlled by the Serbian Free Corps, a volunteer militia supporting the Austrians. Belgrade was besieged by Austrian forces in late 1789 and remained occupied until 1791 when it was handed back to the Caliphate after concluding peace.