History of the Italian Republic through a referendum. In April 1945, the Allies of World War II advanced in the Po plain supported by the Italian resistance movement, and defeated the fascist Italian Social Republic, a puppet state instituted by Nazi Germany and headed by Benito Mussolini. Mussolini was killed by resistance fighters in April 1945. Victor Emmanuel formally abdicated on 9 May 1946; his son became king as Umberto II of Italy. A Constitutional Referendum was held on 2 June 1946. Republicans won, and the monarchy was abolished. The Kingdom of Italy was no more. The House of Savoy, the Italian royal family, was
Line of succession to the former Italian throne Line of succession to the former Italian throne The Italian monarchy was abolished in June 1946 following a referendum which established a republic. The present pretender is in dispute between Vittorio Emanuele, Prince of Naples and Prince Amedeo, Duke of Aosta. Vittorio Emanuele is the son of the last king, Umberto II and was regarded as the head of the House of Savoy unopposed until 7 July 2006 when the Duke of Aosta declared himself to be the head of the house and Duke of Savoy. The heirs to his claim, in order of succession, are numbered below: The Duke