Serbian Free Corps

The Serbian Free Corps (Serbische Freikorps), known simply as frajkori (фрајкори), was a volunteer militia composed of ethnic Serbs, established by the Habsburg Monarchy, to fight the Ottoman Empire during the Austro-Turkish War (1787–91).

History
A Serbian freikorps of 5,000 soldiers had been established in Banat (Banat Military Frontier), composed of refugees that had fled earlier conflicts in the Ottoman Empire. The Corps would fight for liberation of Serbia and unification under Habsburg rule. The main commander was the Austrian major Mihailo Mihaljević. Among volunteers were Aleksa Nenadović and Karađorđe Petrović, and the prominent Radič Petrović and most of all, Koča Anđelković. The Austrians used the Corps in two failed attempts to seize Belgrade, in late 1787 and early 1788.

Other Serb militias were the Kozara Militia and Prosar Militia, established in Bosnia in 1788, composed of 1,000 soldiers each.