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".
Croatian War of Independence
Operation Medak Pocket took place in a salient south of Gospić, from September 9–17. The offensive was undertaken by the Croatian army to stop Serbian artillery in the area from shelling nearby Gospić. The operation met its stated objective of removing the artillery threat, as Croatian troops overran the salient, but it was marred by war crimes. The ICTY later indicted Croatian officers for war crimes. The operation was halted amid international pressure, and an agreement was reached that the Croatian troops were to withdraw to positions held prior to September 9, while UN troops were to occupy the salient alone. The events that followed remain controversial, as Canadian authorities reported that the Croatian army intermittently fought against the advancing Canadian Princess Patricia's Canadian Light Infantry before finally retreating after sustaining 27 fatalities. The Croatian ministry of defense and UN officer's testimonies given during the Ademi-Norac trial deny that the battle occurred.
On February 18, 1993, Croatian authorities signed the Daruvar Agreement with local Serb leaders in Western Slavonia. The aim of the secret agreement was normalizing life for local populations near the frontline. However, authorities in Knin learned of this and arrested the Serb leaders responsible. In June 1993, Serbs began voting in a referendum on merging Krajina territory with Republika Srpska. Milan Martić, acting as the RSK interior minister, advocated a merger of the "two Serbian states as the first stage in the establishment of a state of all Serbs" in his April 3 letter to the Assembly of the Republika Srpska. On January 21, 1994, Martić stated that he would "speed up the process of unification and pass on the baton to all Serbian leader Slobodan Milošević" if elected president of the RSK." These intentions were countered by the United Nations Security Council (UNSC) Resolution 871 in October 1993, when the UNSC affirmed for the first time that the United Nations Protected Areas, i.e. the RSK held areas, were an integral part of the Republic of Croatia.