magazine called in which he advocated Croatian independence. His political party radicalised after the assassination. He found support in the Croatian Rights Republican Youth (Hrvatska pravaška republikanska omladina), a youth wing of the Party of Rights led by Branimir Jelić. On 1 October 1928 he founded an armed group with the same name, an act through which he openly called on Croatians to revolt. This group trained as part of a legal sport society. Yugoslav authorities declared the organization illegal and banned its activities. In exile Pavelić held the position of the Party of Rights secretary until 1929, the beginning of the 6 January Dictatorship in the Kingdom of Yugoslavia. According to Croatian historian Hrvoje Matković, after the King declared his dictatorship Pavelić's house was under constant police watch. At this time, Pavelić started to organize the Ustaša (Ustaša – Hrvatski revolucionarni pokret) as an organization with military and conspiratorial principles. Its official foundation was 7 January 1929. The Ustaša movement was "founded on the principles of racialism and intolerance". Because of the threat of arrest, Pavelić escaped during a surveillance lapse and went to Austria on the night of 19/20 January 1929. According to Tomasevich, Pavelić left for Vienna to "seek medical aid". Initial exile and trial He contacted other Croatian emigrants, mainly political émigrés, former Austrian-Hungarian officers, who gathered around Stjepan Sarkotić and refused to return to Yugoslavia. After a short stay in Austria, alongside Gustav Perčec, Pavelić moved to Budapest. In March 1929, the Ustaše commenced a campaign of terrorism within Yugoslavia with the assassination of Toni Schlegel in Zagreb. Schlegel was a pro-Yugoslav editor of the newspaper Novosti who was also a close confidante of King Alexander. After establishing contact with the Internal Macedonian Revolutionary Organization in April 1929, he and Perčec went to Sofia in Bulgaria. On 29 April 1929, Pavelić and Ivan Mihailov signed the Sofia Declaration in which they formalized cooperation between their movements. In the declaration, they obligated themselves to separate Croatia and Macedonia from Yugoslavia. Yugoslavia protested to Bulgaria. Pavelić was found guilty of high treason and sentenced to death in absentia along with Perčec on 17 August 1929. Because of the Yugoslav verdict, on 25 September 1929 Pavelić was arrested in Vienna and expelled to Germany. Pavelić's stay in Germany was constrained by opposition from the German ambassador to Yugoslavia, Adolf Köster, a supporter of Yugoslavia. A friend of King