 After sixteen months of the Regency's existence, the 1920 Treaty of Rapallo redefined the Italian–Yugoslav borders, among other things transferring Zadar and the islands of Cres, Lastovo, and Palagruža to Italy, securing the island of Krk for Yugoslavia, and establishing the Free State of Fiume; this new state was abolished in 1924 by the Treaty of Rome that awarded Rijeka to Italy and Sušak to Yugoslavia.In April 1941, Yugoslavia was occupied by Nazi Germany and Italy, the latter annexing or occupying the Croatian Littoral, although the armistice between Italy and Allied armed forces of World War II and the 1947 Treaty of Peace with Italy reversed wartime Italian territorial gains, awarding the entire region and adjacent territory to Yugoslavia and the Federal State of Croatia.After the fall of communism, Yugoslavia broke apart as Slovenia and Croatia declared independence in 1991.