Arbitration Commission of the Peace Conference on Yugoslavia
On 20 November 1991 Lord Carrington asked: "Can the internal boundaries between Croatia and Serbia and between Bosnia and Herzegovina and Serbia be regarded as frontiers in terms of public international law?" Applying the principle of "uti possidetis juris", the commission concluded on 11 January 1992, "The boundaries between Croatia and Serbia, between Bosnia and Herzegovina and Serbia, and possibly other adjacent independent states may not be altered except by agreement freely arrived at... Except where otherwise agreed, the former boundaries become frontiers protected by international law".
Plitvice Lakes incident
In 1990, following the electoral defeat of the government of the Socialist Republic of Croatia, ethnic tensions worsened. The Yugoslav People's Army ("Jugoslovenska Narodna Armija" – JNA) confiscated Croatia's Territorial Defence ("Teritorijalna obrana" – TO) weapons to minimize resistance. On 17 August, the tensions escalated into an open revolt of the Croatian Serbs, centred on the predominantly Serb-populated areas of the Dalmatian hinterland around Knin, parts of the Lika, Kordun, Banovina regions and eastern Croatia. They established a Serbian National Council in July 1990, to coordinate opposition to Croatian President Franjo Tuđman's policy of pursuing independence for Croatia. Milan Babić, a dentist from the southern town of Knin, was elected president. Knin's police chief, Milan Martić, established paramilitary militias. The two men eventually became the political and military leaders of the SAO Krajina, a self-declared state incorporating the Serb-inhabited areas of Croatia.