Military Frontier
During the Habsburg administration, Petrovaradin was part of the Habsburg Military Frontier (Slavonian general command - Petrovaradin regiment). In 1848–49, the town was part of Serbian Vojvodina, but in 1849, it was returned under the administration of the Military Frontier. With the abolishment of the Military Frontier in 1881, the town was included into the Syrmia County of Croatia-Slavonia, which was the autonomous kingdom within Austria-Hungary.