Rijeka developed its economic success thanks to the Hungarian government. The complexity of political circumstances in Hungarian-ruled Rijeka develops an autonomous and irredentist current among Italians, with a strong awakening of national consciousness among Croats. All this was reflected in the national composition of the city, and especially the spoken language of its population. The denationalization process will continue after the First World War. The complexity of the Rijeka issue is reflected at the Paris Peace Conference. Rijeka was conquered by D'Annunzio's decisive action. In just over a year of rule, D'Annunzio applied all methods of emerging fascism. D'Annunzio reaches its political climax with the establishment of Reggenza Italiana. The Italian government forcefully seized D'Annunzio's power, but used his efforts to keep Rijeka for Italy. Unable to find an acceptable solution to the Rijeka question, an independent State of Rijeka is first created. However, the continuing political conflicts between the three currents make the State of Rijeka unstable and the borders between the kingdoms of Italy and the SHS very sensitive. In 1924, the state of Rijeka was liquidated by the Treaty of Rome and Rijeka was handed over to Italy.