Croatian police fought armed Serb forces at Plitvice Lakes, an early armed clash that helped turn the political crisis into organized violence. The Yugoslav federal Presidency then ordered the Yugoslav People’s Army (JNA) to intervene as a buffer, drawing federal forces more directly into Croatia.
Croatia and Slovenia declared independence from socialist Yugoslavia, escalating disputes over sovereignty and borders. Fighting quickly spread as the JNA moved to assert federal control and local Serb authorities in Croatia resisted Zagreb’s authority.
Armed conflict began in Slovenia between Slovenian forces and the JNA, showing that the Yugoslav crisis had turned into war. The short conflict also signaled that the center of gravity would shift toward Croatia, where fighting was intensifying.
Under European Community mediation, representatives signed the Brioni Agreement, which helped end major fighting in Slovenia and created a framework for further negotiations. The agreement included a temporary freeze on independence moves, but it did not stop the widening war in Croatia.
The battle for Vukovar became one of the war’s most destructive early campaigns, involving the JNA and Serb forces against Croatian defenders. The long siege drew international attention and deepened displacement and inter-ethnic violence in eastern Slavonia.
The UN Security Council adopted Resolution 713, imposing a general arms embargo on Yugoslavia as fighting spread. The embargo shaped the military balance and became controversial because it applied across the former federation during a rapidly changing breakup.
Vukovar fell after an 87-day siege, leaving the city devastated and triggering major abuses and forced displacement. The fall became a major symbol of the Croatian war experience and hardened positions on both sides.
Croatian and JNA representatives signed an implementation agreement in Sarajevo, establishing a more durable ceasefire tied to the UN-backed Vance Plan. This opened the way for UN peacekeepers to deploy and for designated protected areas to be created, even though core political disputes remained unresolved.
The UN Security Council adopted Resolution 757, imposing broad sanctions on the Federal Republic of Yugoslavia (Serbia and Montenegro) over the wider regional wars. The sanctions reflected growing international efforts to limit support for armed campaigns and push parties toward negotiations.
The UN Security Council adopted Resolution 827, establishing the International Criminal Tribunal for the former Yugoslavia (ICTY). The tribunal created a major accountability mechanism for serious violations of international humanitarian law committed since 1991.
Bosnian and Croatian leaders signed the Washington Agreement, ending the Croat–Bosniak war and creating the Federation of Bosnia and Herzegovina. This shift mattered for Croatia’s war environment because it reduced a major conflict line next door and changed regional military and diplomatic dynamics.
Croatian forces launched Operation Storm, rapidly recapturing much of the territory held by the Serb-controlled Republic of Serbian Krajina. The offensive changed the map decisively and accelerated broader peace efforts, alongside a large movement of civilians from the conflict zone.
Croatia and local Serb authorities signed the Erdut Agreement to resolve the remaining Serb-held region in eastern Croatia without major new fighting. The agreement established a process for peaceful reintegration under international supervision, addressing one of the last major unresolved fronts in Croatia.
Presidents of Bosnia and Herzegovina, Croatia, and Serbia initialed the Dayton Accords in the United States, ending the Bosnian War and stabilizing the broader regional conflict. While not a Croatia-only agreement, Dayton helped lock in a regional shift from large-scale fighting toward negotiated settlement and implementation.
The UN Security Council adopted Resolution 1037, creating the United Nations Transitional Authority for Eastern Slavonia, Baranja and Western Sirmium (UNTAES). This mission implemented the Erdut process, marking a clear transition from war to internationally supervised reintegration in Croatia’s last major contested region.
Breakup of Yugoslavia and the Croatian War of Independence (1991–1995)