Hungarian Soviet Republic

The Hungarian Soviet Republic, also known as the Socialist Federative Soviet Republic of Hungary was a short-lived state that existed from 21 March 1919 to 1 August 1919 (133 days), succeeding the First Hungarian Republic. The Hungarian Soviet Republic was a small rump state run by communists and socialists which, at its time of establishment, controlled approximately only 23% of Hungary's historic territory.

Source: Wikipedia — Hungarian Soviet Republic (CC BY-SA 4.0)