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".
Yugoslav Wars
Ethnic tensions rose, fueled by propaganda in both Croatia and Serbia. On 2 May 1991, one of the first armed clashes between Serb paramilitaries and Croatian police occurred in the Battle of Borovo Selo. On 19 May an independence referendum was held, which was largely boycotted by Croatian Serbs, and the majority voted in favour of the independence of Croatia. Croatia declared independence and dissolved its association with Yugoslavia on 25 June 1991. Due to the Brioni Agreement, a three-month moratorium was placed on the implementation of the decision that ended on 8 October.