Author in this paper analyses ongoings and processes reffered on dissolution of laws-tate conjuction with Austaria-Hungary Monarchy, establishing State of Slovenian, Croatian and Serbs, accession Consiglio Nazionale on the position of Rijeka's Nacional Council of State SHS, D'Annunzio's campaign from Ronchi and arrival in Rijeka, and in the end, establishing separate Kvarner's state Reggenza Italiana del Carnaro, apropos Italian regency of Kvarner. Subject of this paper is, also, analysis of D'Annunzio's Constitution, which presenting very special expression of constitutional-juristic and political ideas, announces italian model of corporatism, as special ideal-poltical base of constitutionality of fasistic Italy. Moreover, there is analysis of Bloody Christmas, so called five Rijeka's days (cinque giornate di Fiume), which is the name of war for Rijeka that lasted from 24th till 29th december 1920. Author analyses, also, Opatija's pact which concluded that Rijeka's state submited to application of Rapall's agreement. Gabriele D'Annunzio left Rijeka on 18th january 1921. [ABSTRACT FROM AUTHOR]