Ottoman Empire, Jovan Nenad and Radoslav Čelnik
The Ottoman Empire took control of the territory of present-day Vojvodina following the Battle of Mohács of 1526 and the conquest of Banat in 1552. This turbulent period caused a massive depopulation of this region, with most of the Hungarians and Catholic Croats (Šokci) fled to the north, and were replaced by Serb and Muslim inhabitants.
Soon after the Battle of Mohács, Jovan Nenad, a leader of the Serb mercenaries, established his rule in Bačka, northern Banat and a small part of Syrmia. He created an ephemeral independent state, with Subotica as its capital. At the pitch of his power, Jovan Nenad proclaimed himself Serbian Emperor in Subotica. Taking advantage of the extremely confused military and political situation, the Hungarian noblemen from the region joined forces against him and defeated the Serbian troops in the summer of 1527. Emperor Jovan Nenad was assassinated and his state collapsed.
After the assassination of Jovan Nenad, the general commander of his army, Radoslav Čelnik, moved with part of the former emperor's army from Bačka to Syrmia, and acceded into the Ottoman service. Radoslav Čelnik then ruled over Syrmia as Ottoman vassal and took for himself the title of the duke of Syrmia, while his residence was in Slankamen.
During the Ottoman rule, most of the inhabitants of the territory of present-day Vojvodina region were Serbs. During that time, villages were mostly populated with Serbs, while cities were mostly mixed with various Muslim populations including islamized Serbs. Eyalet of Temeşvar (Turkish province) existed in Banat after 1552, while the Sanjak of Syrmia and the Sanjak of Szeged existed in Syrmia and Bačka. In 1594 Serbs in Banat staged an uprising opposing Ottoman rule. This was one of three largest Serbian uprisings in history, and the largest before the First Serbian Uprising led by Karađorđe.
Read more about this topic: History Of Vojvodina