A revolution breaks out in Hungary, and the Habsburg rulers are compelled to meet the demands of the reform party.

The Hungarian Revolution of 1848, also known in Hungary as Hungarian Revolution and War of Independence of 1848–1849 was one of many European Revolutions of 1848 and was closely linked to other revolutions of 1848 in the Habsburg areas. Although the revolution failed, it is one of the most significant events in Hungary's modern history, forming the cornerstone of modern Hungarian national identity—the anniversary of the Revolution's outbreak, 15 March, is one of Hungary's three national holidays.

The House of Habsburg, also known as the House of Austria, was one of the most powerful dynasties in the history of Europe and Western civilization. They were best known for their inbreeding and for ruling vast realms throughout Europe during the Middle Ages and early modern period, including the Holy Roman Empire and Spain.

March 15 is the 74th day of the year in the Gregorian calendar; 291 days remain until the end of the year.