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".
United Nations Transitional Administration for Eastern Slavonia, Baranja and Western Sirmium
After Operation Storm in mid-1995, the only remaining part of the Republic of Serbian Krajina became that in the east, near the border with Yugoslavia. In context of successful military interventions Bljesak and Oluja, initial idea that the region of Eastern Slavonia will be integrated back to Croatia through the peaceful means was perceived with astonishment on Croatian side and as a form of pressure from the international community while the military establishment held informal talks about preparation of a military solution for the region under the code name “Skok u Dalj” (“Jump to Dalj”). There was lack of enthusiasm and belief that peaceful process will be successful among involved parties and other states in the region, themselves recently involved in Yugoslav Wars. The Erdut Agreement between the Croatian Government and the representatives of the Serbs in the region was signed in November 1995, which requested that the UN form a transitional authority and a peacekeeping force. United Nations Security Council Resolution 1023 supported that, and after the UNCRO mission was terminated in the United Nations Security Council Resolution 1025, UNTAES was set up to serve as a United Nations protectorate over the region in Resolution 1037. Reintegration of the region, the last part of the country outside the control of central government and arguably geopolitically the most sensitive part of former self-proclaimed Republic of Serbian Krajina, was the most important Croatian condition for participation in Dayton Peace Negotiations. The subsequent Dayton agreement for peace in Bosnia ended the deadliest conflicts of the Yugoslav wars.