The Socialist Federative Republic of Councils in Hungary was a short-lived communist state that existed from 21 March 1919 to 1 August 1919, succeeding the First Hungarian Republic. The Hungarian Soviet Republic was a small communist rump state which, at its time of establishment, controlled approximately only 23% of Hungary's historic territory. The head of government was Sándor Garbai, but the influence of the foreign minister Béla Kun of the Party of Communists in Hungary was much stronger. Unable to reach an agreement with the Triple Entente, which maintained an economic blockade of Hungary, in dispute with neighboring countries over territorial disputes, and beset by profound internal social changes, the soviet republic failed in its objectives and was abolished a few months after its existence. Its main figure was the Communist Béla Kun, despite the fact that in the first days the majority of the new government consisted of radical Social Democrats. The new system effectively concentrated power in the governing councils, which exercised it in the name of the working class.

Béla Kun was a Hungarian communist revolutionary and politician who governed the Hungarian Soviet Republic in 1919. After attending Franz Joseph University at Kolozsvár, Kun worked as a journalist up until the First World War. He served in the Austro-Hungarian Army and was captured by the Imperial Russian Army in 1916, after which he was sent to a prisoner-of-war camp in the Urals. Kun embraced communist ideas during his time in Russia, and in 1918 he co-founded a Hungarian arm of the Russian Communist Party in Moscow. He befriended Vladimir Lenin and fought for the Bolsheviks in the Russian Civil War.