Revolutions of 1848 in the Austrian Empire of the Serbs in Austrian Empire was held between 1 and 3 May 1848 in Sremski Karlovci, during which the Serbs proclaimed autonomous Habsburg crownland of Serbian Vojvodina. The war started, leading to clashes as such in Srbobran, where on July 14, 1848, the first siege of the town by Hungarian forces began under Baron Fülöp Berchtold. The army was forced to retreat due to a strong Serbian defense. With war raging on three fronts (against Romanians and Serbs in Banat and Bačka, and Romanians in Transylvania), Hungarian radicals in Pest saw this as an opportunity. Parliament made concessions to
Valuation of cancellations of the Austrian Empire all postmarks used in the Austrian empire, Lombardy, Venetia and in the Austria post-offices in the Ottoman empire. The relative valuation of those postmarks contains a popularity index, which is a multiplicative factor on top of the rarity. Closely related article is Postage stamps and postal history of Austria for a better understanding of the historical context. The Austrian Empire stamps were first issued on June 1, 1850: a coat of arms under the text KK Post-Stempel. The word Austria does not appear, which is logical, as the issue served in whole central Europe, more precisely in all or in