the leader of the Soviet Union Joseph Stalin personally before Yugoslav commission of the Comintern insisting that the KPJ must harness national movements for revolutionary aims. Regardless, the factional struggle continued. In 1927, the seat of the KPJ central committee in Yugoslavia was moved from Belgrade to Zagreb. Leftists prevail In February 1928, Josip Broz Tito and Andrija Hebrang, seeking to stir the existing situation into resolution of the conflict, persuaded the delegates to conference of the Zagreb KPJ organisation to adopt a resolution seeking the Comintern to intervene and end the factional struggle in the KPJ entirely. The KPJ also led some of street protests in Croatia over assassination of Radić later that year. The Comintern Sixth World Congress held that year sought to increase revolutionary struggle and the strategy was accepted by the KPJ at its Fourth Congress held in Dresden in October 1928. The appeal made at the initiative of Tito and Hebrang was accepted: Marković was expelled and his allies demoted, while new leadership was installed. Tito and Hebrang were bypassed because they were just imprisoned in Yugoslavia, and Đuro Salaj, Žika Pecarski, and Đuro Đaković were appointed instead as entirely Comintern-trained leadership. In 1929, the new KPJ leadership put the Comintern's call to violence into practice, but instead of all-out revolt, the efforts were consisted of leaflets and several shoot-outs with the police. KPJ losses were heavy and included death of several significant leaders including Đaković and imprisonment of its most active members by specially convened antisubversive tribunals. In turn, the Sremska Mitrovica Prison became a makeshift KPJ training school as the prison allowed grouping of political prisoners. On instructions from the Comintern, non-Serb members of the KPJ were to advocate breakup of Yugoslavia as a construct of the Western Powers. However at the time, most of their efforts were invested in struggle against the JSDS and debating revolutionary merits of literature written by Miroslav Krleža. By 1932, membership dwindled to less than 500, the KPJ maintained its leadership divided in at least two locations at all times in 1928–1935, including at least one abroad in Moscow, Prague, Vienna, or Paris. Also acting on Comintern July 1932 instructions to promote and aid national revolt in Croatia, Slovenia, Montenegro, and Macedonia, the KPJ sought to establish ties with the Bulgaria-based Internal Macedonian Revolutionary Organization, but the organisation was suffering from its internal weaknesses and suppressed by