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".
Croatia proper
After the break-up of Yugoslavia and Croatia's declaration of independence in 1991, the Republic of Serbian Krajina (RSK) was proclaimed in parts of Croatia, including parts of the Croatia—Banovina and Kordun—encompassing areas east of Karlovac and south of Sisak, marking the start of the Croatian War of Independence. After the January 1992 ceasefire, a United Nations peacekeeping force was deployed to the area. The area remained outside control of the government of Croatia until August 1995, when it was recaptured in Operation Storm. The Croatian Army campaign ended following the surrender of the last operational corps of the RSK military in Viduševac, near Glina.