République démocratique hongroise
Charles's last Hungarian prime minister, Mihály Károlyi, took advantage of the situation and proclaimed the Hungarian Democratic Republic, with himself as provisional president. The continued Allied occupation made Károlyi's situation untenable, and in March 1919 he was pushed out of office by a Social Democratic-Communist coalition that proclaimed the Hungarian Soviet Republic. Under the Communist leader Béla Kun, Hungary became the world's second Communist nation. However, Kun's government was overthrown in August by Romanian troops. Eventually, Archduke Joseph August, Charles' cousin, took power as regent for Charles, only to be forced out when the Allies refused to recognize him.