 Croatia subsequently declared independence and dissolved ( Croatian : <unk> ) its association with Yugoslavia on 25 June 1991 . The European Economic Community and the Conference on Security and Cooperation in Europe urged Croatian authorities to place a three @-@ month moratorium on the decision . Croatia agreed to freeze its independence declaration for three months , initially <unk> tensions . Nonetheless , the Croatian War of Independence escalated further . On 7 October , the eve of expiration of the moratorium , the Yugoslav Air Force attacked <unk> <unk> , the main government building in Zagreb . On 8 October 1991 , the moratorium expired , and the Croatian Parliament severed all remaining ties with Yugoslavia . That particular session of the parliament was held in the <unk> building on <unk> <unk> Avenue in Zagreb due to security concerns provoked by recent Yugoslav air raid ; Specifically , it was feared that the Yugoslav Air Force might attack the parliament building . 8 October is now celebrated as Croatia 's Independence Day . 
