Breakup of Yugoslavia (1991–2008): Collapse of a Federation

The breakup of Yugoslavia was the collapse of the Socialist Federal Republic of Yugoslavia, a multinational communist state in southeastern Europe, between 1991 and 1992, followed by further separations that lasted until 2008. A series of declarations of independence and wars turned one federation of about 23 million people into seven states. The wars that accompanied the breakup were the deadliest in Europe since the Second World War and led to the first international war crimes trials since Nuremberg and Tokyo.

Background: Tito’s Yugoslavia

Yugoslavia, “the land of the South Slavs”, was first created in 1918. After the invasion of Yugoslavia in 1941 and a brutal war of occupation and civil conflict, the communist Partisans of Josip Broz Tito took power in 1945. Tito built a federation of six republics: Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro and Macedonia. Within Serbia, Vojvodina and Kosovo became autonomous provinces.

After the Tito–Stalin split of 1948, Yugoslavia followed its own path of socialism, with worker self-management, open borders for travel and a leading role in the Non-Aligned Movement. The slogan “brotherhood and unity” was meant to overcome memories of wartime massacres between Serbs, Croats, Bosniaks and others.

The 1974 constitution gave the republics and provinces wide powers. After Tito’s death on 4 May 1980, a collective presidency with a rotating chairman replaced him. No single figure or institution held the country together in the same way again.

Crisis in the 1980s

During the 1980s Yugoslavia suffered a severe economic crisis. Foreign debt, falling living standards and inflation that exceeded 1,000 per cent by 1989 undermined faith in the system. The wealthier northern republics of Slovenia and Croatia increasingly resented subsidising poorer regions, while Serbia felt its position in the federation had been weakened.

In Kosovo, where Albanians formed a large majority, protests in 1981 were put down by force, and tensions with the Serb minority grew. In 1986 a draft memorandum of the Serbian Academy of Sciences and Arts, leaked to the press, claimed that Serbs were discriminated against within Yugoslavia. It became a reference point for Serbian nationalism.

Slobodan Milošević took control of the League of Communists of Serbia in 1987. Using mass rallies in what became known as the “anti-bureaucratic revolution”, his supporters replaced the leaderships of Vojvodina, Kosovo and Montenegro in 1988–1989. Kosovo’s autonomy was sharply reduced in 1989. This gave Serbia and its allies control of four of the eight votes in the federal presidency, alarming the other republics.

The end of the federation

In January 1990 the League of Communists of Yugoslavia, the country’s ruling party, broke apart at its 14th Congress when the Slovenian and then Croatian delegations walked out. Multiparty elections in all six republics during 1990 brought nationalist or reformist parties to power in Slovenia, Croatia, Bosnia and Herzegovina and Macedonia, while Milošević’s Socialists won in Serbia and their allies in Montenegro.

Slovenia and Croatia proposed turning Yugoslavia into a loose confederation of sovereign states. Serbia and Montenegro insisted on a more centralised federation. Large Serb communities living in Croatia and Bosnia feared becoming minorities in independent states, and Serbian leaders argued that if Yugoslavia dissolved, all Serbs should live in one state.

The federal government under Prime Minister Ante Marković tried to hold the country together through economic reform. A new convertible dinar introduced in 1990 briefly brought inflation under control, but Marković lacked a political base, and the republics increasingly ignored federal decisions.

In a referendum on 23 December 1990, a large majority in Slovenia voted for independence; Croatia followed with a referendum on 19 May 1991. The federal institutions were paralysed. In May 1991 Serbia and its allies blocked the Croat Stjepan Mesić from taking his turn as chairman of the collective presidency, and the federation was left without a functioning head of state. On 25 June 1991 Slovenia and Croatia declared independence.

The wars of succession

Slovenia (1991). The Yugoslav People’s Army (JNA) moved to take control of Slovenia’s borders, triggering the Ten-Day War from 27 June to 7 July 1991. Fewer than 100 people were killed. Under the Brioni Agreement the JNA withdrew, and Slovenia, which had almost no Serb minority, left the federation relatively easily.

Croatia (1991–1995). In Croatia, Serb rebels backed by the JNA and Serbian paramilitaries seized about a third of the country. The siege of Vukovar and the shelling of Dubrovnik shocked the world. A UN-monitored ceasefire took hold in January 1992, and Croatia regained most of the lost territory in 1995. The conflict is covered in the article on the Croatian War of Independence.

Macedonia (1991). Macedonia held a referendum in September 1991 and left peacefully. A dispute with Greece over its name led to UN admission in 1993 under the provisional name “the former Yugoslav Republic of Macedonia”; the country became North Macedonia in 2019.

Bosnia and Herzegovina (1992–1995). Bosnia, with a mixed population of Bosniaks (Bosnian Muslims), Serbs and Croats, voted for independence in a referendum in early 1992 that most Bosnian Serbs boycotted. War broke out in April 1992. About 100,000 people were killed, the capital Sarajevo was besieged for nearly four years, and in July 1995 Bosnian Serb forces killed about 8,000 Bosniak men and boys at Srebrenica. The Bosnian War ended with the Dayton Agreement in late 1995.

International response

The European Community tried to mediate and set up an arbitration commission under the French lawyer Robert Badinter. In late 1991 it concluded that Yugoslavia was “in the process of dissolution”. The European Community recognised Slovenia and Croatia on 15 January 1992, after Germany had pressed for early recognition. Bosnia and Herzegovina was recognised in April 1992.

The United Nations imposed an arms embargo on all of Yugoslavia in 1991 and sanctions on Serbia and Montenegro in 1992. It deployed peacekeepers, the UN Protection Force (UNPROFOR), in Croatia and Bosnia, but they were often unable to protect civilians. In 1993 the Security Council created the International Criminal Tribunal for the former Yugoslavia (ICTY) in The Hague. NATO air strikes in Bosnia in 1995 helped bring the parties to the negotiating table at Dayton, Ohio.

The last separations

On 27 April 1992 Serbia and Montenegro formed the Federal Republic of Yugoslavia, which claimed to continue the old state. This claim was not accepted internationally, and the country was only admitted to the UN as a new member in 2000, after Milošević fell from power.

In Kosovo, an armed conflict between Serbian forces and the Kosovo Liberation Army escalated in 1998. After a NATO bombing campaign from March to June 1999, Kosovo was placed under UN administration, as described in the article on the Kosovo War. On 17 February 2008 Kosovo declared independence. It has been recognised by many states, including the United States and most EU members, but not by Serbia, Russia, China and several others.

In 2003 the Federal Republic of Yugoslavia was renamed Serbia and Montenegro, and the name Yugoslavia disappeared. Montenegro voted narrowly for independence on 21 May 2006 and declared it on 3 June 2006, leaving Serbia as a separate state.

Consequences and legacy

The wars of the 1990s killed an estimated 130,000 to 140,000 people and displaced roughly four million at their peak. Whole regions were ethnically homogenised through “ethnic cleansing”, the forced removal of populations. Economies were shattered, and many young and educated people emigrated.

The ICTY indicted 161 people before it closed in 2017. Those convicted included Bosnian Serb leaders Radovan Karadžić and Ratko Mladić for genocide at Srebrenica and other crimes. Milošević was tried for war crimes but died in custody in 2006 before a verdict.

Today Slovenia and Croatia are members of the European Union and NATO, while the other successor states are at various stages of seeking EU membership. Memories of the wars, disputes over responsibility and questions about Kosovo’s status continue to shape the politics of the region.

By the numbers

Timeline

• 1980, 4 May: Josip Broz Tito dies.
• 1990, January: The League of Communists of Yugoslavia breaks apart.
• 1991, 25 June: Slovenia and Croatia declare independence.
• 1991, 27 June – 7 July: The Ten-Day War in Slovenia.
• 1992, 15 January: The European Community recognises Slovenia and Croatia.
• 1992, April: War begins in Bosnia and Herzegovina.
• 1995, November–December: The Dayton Agreement ends the Bosnian War.
• 1999, March–June: NATO bombs Yugoslavia over Kosovo.
• 2006, 3 June: Montenegro declares independence.
• 2008, 17 February: Kosovo declares independence.

Why it matters

The breakup of Yugoslavia showed that the end of the Cold War could bring not only peaceful revolutions but also violent nationalism and war in Europe. It reshaped the map of the Balkans, tested the capacity of the EU, UN and NATO to manage conflict, and gave rise to modern international criminal justice. Its lessons about minorities, borders and the dangers of nationalist mobilisation remain relevant across the world.