argument for achieving this goal. According to the concept of the "Croatian State Right", they expressed a need for unification of all Croat lands, including Bosnia and Herzegovina. The program was signed by President of the Party of Rights, dr. Vladimir Prebeg and Secretary of the Party, Ante Pavelić. A unified Party of Rights participated in the 1920 Kingdom of Serbs, Croats and Slovenes Constitutional Assembly election. The Croatian politics at the time started to be dominated by the Croatian Peasant Party, but in 1921, the Croatian parties started to form the Croatian National Representation (Croatian Bloc) that included the Party of Rights. Stjepan Radić and other coalition leaders ejected the Party of Rights from the coalition by the end of 1922. The Party of Rights ran standalone in the 1923 Kingdom of Serbs, Croats and Slovenes parliamentary election. It did not enter the 1925 Kingdom of Serbs, Croats and Slovenes parliamentary election, but did join the Bloc again the same year. The Party of Rights cooperated with Stjepan Radić as part of the Croatian Bloc, composed of the Croatian Republican Peasant Party, Croatian Union and the Party of Rights. The Party of Rights alone was unable to influence the majority of Croats, as their main supporters were a small number of middle class citizens, the majority of whom lived in Zagreb, while Stjepan Radić dominated among Croats elsewhere. Within this bloc, Party of Rights opposed Serbian nationalist hegemony and centralism. Sometimes they objected to Radić's readiness to come to an understanding with the Serbian side. The main vehicle of the Party of Rights was the concept of the Croatian Right (), which made the idea of Yugoslavism unsustainable, assessing it as misconception and the main obstacle to Croatian independence. Nevertheless, the leaders of the Party of Rights had established contacts with the People's Radical Party in Belgrade and occasionally fought for their own particular interests. In 1924–25, this controversial relationship became public, particularly as the party's then-vice-president Mirko Košutić publicly accused the rest of the party leadership of colluding with the government of Nikola Pašić against the interests of the Croatian Bloc. In 1929, the king of Yugoslavia instituted the January 6th Dictatorship. He banned all political parties, and the militant wing of the Party of Rights went underground to organize the Ustaše movement, led by former party secretary Ante Pavelić, whose wing of the party was the most