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
History of the Ottoman Empire conquest of Esztergom in 1543. France and the Ottoman Empire, united by mutual opposition to Habsburg rule in both Southern and Central Europe, became strong allies during this period. The alliance was economic and military, as the sultans granted France the right of trade within the Empire without levy of taxation. By this time, the Ottoman Empire was a significant and accepted part of the European political sphere. It made a military alliance with France, the Kingdom of England and the Dutch Republic against Habsburg Spain, Italy and Habsburg Austria. As the 16th century progressed, Ottoman naval superiority was challenged