Rebellions lead to abolition of serfdom in Austria and Hungary.
Precursor to Romanian nation forms as Moldavia and Wallachia unite under the same ruling prince.
Romania's independence is officially recognized. Bulgaria becomes an autonomous state in the Ottoman Empire.
Bulgaria gains independence.
After World War II, Romania, Bulgaria, and Hungary return to their pre-1941 borders.
The Transylvania region of present-day Romania was part of Hungary until after World War I. See the “Austria and Hungary section to view maps of Transylvania within Austria-Hungary and the Austrian Empire.
