Serbian Vojvodina
Serbian Vojvodina was a short-lived self-proclaimed autonomous province within the Austrian Empire in Kingdom of Hungary during the Hungarian Revolution and War of Independence of 1848–1849, which existed until 1849 when it was transformed into the new (official) Austrian province named Voivodeship of Serbia and Temes Banat. It was created and led by political leaders of Serbs in regions of Syrmia, Banat, Bačka and Baranja.