The Hungarian Defence Forces is the national defence force of Hungary. Since 2007, the Hungarian Armed Forces is under a unified command structure. The Ministry of Defence maintains the political and civil control over the army. A subordinate Joint Forces Command is coordinating and commanding the HDF corps. In 2020, the armed forces had 22,700 personnel on active duty. In 2019, military spending was $1.904 billion, about 1.22% of the country's GDP, well below the NATO target of 2%. In 2016, the government adopted a resolution in which it pledged to increase defence spending to 2.0% of GDP and the number of active personnel to 37,650 by 2026.

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.