The success of the Russian intervention in the Danubian principalities influenced the Tsar’s decision to intervene in Hungary in June 1849. The Hungarian revolution had begun in March 1848, when, inspired by the events in France and Germany, the Hungarian Diet, led by the brilliant orator Lajos Kossuth, proclaimed Hungary’s autonomy from the Habsburg Empire and passed a series of reforms, abolishing serfdom and establishing Hungarian control of the national budget and Hungarian regiments in the imperial army.