Hungarian Revolution of 1848: parliament, crisis government, and war with Croatia and Transylvania

Background. The Hungarian Revolution of 1848 was part of broader European upheavals. In April 1848, Hungary enacted laws for democratic parliamentary elections. The administration remained largely untouched by the Austrian Empire until the revolution. On 3 March 1848, Lajos Kossuth demanded parliamentary government for Hungary. The Emperor assented on 17 March, allowing Lajos Batthyány to create the first Hungarian government responsible to the Diet, not the King.

Crisis Government. Relations between Hungary and the Austrian government deteriorated after the outbreak of the revolution. In September 1848, Ferdinand V, King of Hungary, compelled the Batthyány government to resign. The nation lacked executive authority until the National Defence Committee, led by Lajos Kossuth, assumed power. This committee acted as a temporary crisis government, independent from Vienna, marking a shift in revolutionary leadership.

Ethnic Conflict. The Austrian monarchy manipulated Croatians, Serbians, and Romanians, making conflicting promises. In September 1848, Austrian commander Karl von Urban made the first stand against the Revolution. In Transylvania, Avram Iancu, a Romanian lawyer, played an important role in the local chapter of the revolutions. These ethnic tensions contributed to the instability and conflict within the region.

War with Croatia. Josip Jelačić, Ban of Croatia, sought to support Austrian interests by opposing the Hungarian Revolution. The Croatian Constitution of 1848 declared languages inviolable, but Catholic Croatia protested against equality propagated by Hungarian liberals. The appointment of Jelačić as Ban was forced by the revolution. Jelačić's military campaigns during the Revolutions of 1848 included actions against Hungary.