of Serbs, Jews, and Roma being committed by the Ustaše regime. The number of Serb victims was approximately 300,000 to 350,000. According to Tito himself, Serbs made up the vast majority of Anti-fascist fighters and Yugoslav Partisans for the whole course of World War II. The Republic of Užice was a short-lived liberated territory established by the Partisans and the first liberated territory in World War II Europe, organised as a military mini-state that existed in the autumn of 1941 in the west of occupied Serbia. By late 1944, the Belgrade Offensive swung in favour of the partisans in the civil war; the partisans subsequently gained control of Yugoslavia. Following the Belgrade Offensive, the Syrmian Front was the last major military action of World War II in Serbia. A study by Vladimir Žerjavić estimates total war related deaths in Yugoslavia at 1,027,000, including 273,000 in Serbia. Socialist Yugoslavia The victory of the Communist Partisans resulted in the abolition of the monarchy and a subsequent constitutional referendum. A one-party state was soon established in Yugoslavia by the Communist Party of Yugoslavia. It is claimed between 60,000 and 70,000 people died in Serbia during the 1944–45 communist takeover and purge. All opposition was suppressed and people deemed to be promoting opposition to socialism or promoting separatism were imprisoned or executed for sedition. Serbia became a constituent republic within the Socialist Federal Republic of Yugoslavia (SFRY) known as the Socialist Republic of Serbia, and had a republic-branch of the federal communist party, the League of Communists of Serbia. Serbia's most powerful and influential politician in Tito-era Yugoslavia was Aleksandar Ranković, one of the "big four" Yugoslav leaders, alongside Tito, Edvard Kardelj, and Milovan Đilas. Ranković was later removed from the office because of the disagreements regarding Kosovo's nomenklatura and the unity of Serbia. Ranković's dismissal was highly unpopular among Serbs. Pro-decentralisation reformers in Yugoslavia succeeded in the late 1960s in attaining substantial decentralisation of powers, creating substantial autonomy in Kosovo and Vojvodina, and recognising a distinctive "Muslim" nationality. As a result of these reforms, there was a massive overhaul of Kosovo's nomenklatura and police, that shifted from being Serb-dominated to ethnic Albanian-dominated through firing Serbs on a large scale. Further concessions were made to the ethnic Albanians of Kosovo in response to unrest, including the creation of the University of Pristina as an Albanian language institution. These changes created widespread fear among Serbs