 Complete the following phrase:  In 1990, following the electoral defeat of the government of the Socialist Republic of Croatia by the Croatian Democratic Union , HDZ, ethnic tensions between Croats and Serbs worsened. The self-styled Republic of Serb Krajina RSK declared its intention to secede from Croatia and join the Republic of Serbia while the Government of the Republic of Croatia declared it a rebellion. According to the Croatian 1991 census, Serbs were the largest ethnic group in the municipality of Pakrac 46.4, followed by Croats 35.8. In March 1991, Pakrac was the site of 