When the unified Communist Party of Yugoslavia fell apart in 1990, democratic elections became possible, in which Slovenia and Croatia rejected the communist system. In the Croatian elections, the Croatian Democratic Union led by Franjo Tudjman won the elections. They held a referendum in May 1991 , in which over 90 percent of the people of the Republic of Croatia voted for independence. A month later, the Croatian Parliament passed a decision which established the independence of the Republic of Croatia. This was opposed by the Serbs led by Milosevic, although before this they rejected an offer for a con- federation.
In 1991, the Yugoslav Army, which was in reality a Serbian army, attacked Slovenia, and then immediately after this Croatia and then Bosnia- Herzegovina. The Yugoslav Army was assisted in Croatia by a revolt of the armed Croatian Serbs. The Croatian people, although unarmed, mounted a fierce resistance, and defended Vukovar, Dubrovnik and other cities which were brutally attacked for months. Historical development of Croatia In this war, villages were burned and people were expelled or killed. Although they occupied a fourth of Croatia, the Serbs realized that they could not subjugate Croatia easily, so at the end of 1991 they agreed to the mediation of the United Nations. Which the support of some Central European states, Croatia was recognized on January 15, 1992 as an independent state.