The Military Frontier was a borderland of the Habsburg monarchy and later the Austrian and Austro-Hungarian Empire. It acted as the cordon sanitaire against incursions from the Ottoman Empire.
Migration of the Serbs (Seoba Srba), by Paja Jovanović, portrays Serbian Patriarch Arsenije III Čarnojević, surrounded by soldiers, flocks of sheep and women with babies, leading some 36,000 families from his seat in Peć, to what is now Vojvodina in 1690, after the failure of a Serb revolt.
Various Frontier troops, 1756
The Austrian Empire, officially known as the Empire of Austria, was a multinational European great power from 1804 to 1867, created by proclamation out of the realms of the Habsburgs. During its existence, it was the third most populous monarchy in Europe after the Russian Empire and the United Kingdom. Along with Prussia, it was one of the two major powers of the German Confederation. Geographically, it was the third-largest empire in Europe after the Russian Empire and the First French Empire.
Greatest extent of the Austrian Empire (1846–1859)
Karl von Schwarzenberg and the monarchs of Austria, Prussia, and Russia after the Battle of Leipzig, 1813
The Battle of Komárom during the Hungarian Revolution, 1849
Austrian Emperor Franz Joseph with his troops at the Battle of Solferino, 1859
