constitution that changed the wording with regard to Serbs of Croatia. In the first paragraph of the Article 12, Croatian was specified as the official language and alphabet, and dual-language road signs were torn down even in Serb majority areas. Furthermore, a number of Serbs were removed from the bureaucracies and the police and replaced by ethnic Croats. Many Serbs in government lost their jobs, and HDZ made themselves target of Serbian propaganda by having party members attempting to rehabilitate the WWII Croatian fascist movement Ustaše, or by saying that the numbers of people killed in Jasenovac, one of the largest extermination camp in Europe, were inflated. The party representing the interests of Serbs in Croatia, the Serbian Democratic Party (SDS), which rejected the new constitution, began building its own national governmental entity in order to preserve rights that Serbs saw as being stripped away and to enhance the sovereignty of the Croatian Serbs. Croatian War of Independence Amid rising of Serbian nationalism and tensions between Yugoslav republics during the breakup of Yugoslavia, on 8 July 1989 Serbs held a rally in Knin during which they exhibited numerous Chetnik symbols and were invoking JNA's military intervention against Croatia. With the introduction of the multiparty system, the first ethnic Serb parties were founded in Croatia, largest being Serb Democratic Party (SDS). Soon afterward, extremist leaders of the Serb movements in Lika, Northern Dalmatia, Kordun, and Podunavlje called for armed rebellion against Croatian government, violence against Croats and refused to recognize legally elected Croatian authorities. Tension grew following the Croatian Democratic Union's victory in the 1990 general election since one of its political goals was Croatia's independence from Yugoslavia. Jovan Rašković, leader of SDS, refused to participate in the work of the Croatian Parliament in May 1990. Some prominent Serbian politicians and scientists, such as Simo Rajić and Jovan Bamburać, called for coexistence, de-escalation and peace, while others organized Serb parties in the Croatian government-controlled areas, like Milan Đukić, while others, like Veljko Džakula, unsuccessfully tried to organize the parties in the rebelled areas, but their work was prevented by Serb nationalists. On 17 August 1990, part of the Croatian Serbs, supported by Serbia, rebelled against Croatian government in the so-called Log Revolution On 22 December 1990, Croatian Parliament ratified a new constitution in which Serbs were classified as a national minority. Previously Serbs were considered autochthonous constituent of Croatia. The proclamation