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".
SAO Eastern Slavonia, Baranja and Western Syrmia
The entity was formed on June 25, 1991, the same day the Socialist Republic of Croatia decided to withdraw from Yugoslavia, following the Croatian independence referendum, 1991. In the first phase of the Croatian War of Independence, in 1992, the oblast joined the breakaway Republic of Serbian Krajina (RSK). After the fall of Republic of Serbian Krajina in 1995, there was a short-lived Serb parallel entity Eastern Slavonia, Baranja and Western Syrmia that existed in the same area and was reintegrated with the rest of country after the signing of Erdut Agreement and the end of the United Nations Transitional Administration for Eastern Slavonia, Baranja and Western Sirmium in 1998.