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".
Agreement on Friendship and Cooperation between Bosnia and Herzegovina and Croatia
Izetbegović, who had hoped to prevent Bosnia Herzegovina from falling under the influence of Croatia or Serbia, signed the agreement after Stjepan Kljuić, president of the Croatian Democratic Union's (HDZ) branch in Bosnia and Herzegovina, was replaced by Tuđman with Mate Boban, who blocked the delivery of supplies to Sarajevo where a siege was under way and had proclaimed an independent Croatian Republic of Herzeg-Bosnia (HR-HB). The agreement fell apart in October after a number of events including the assassination of Blaž Kraljević, leader of Croatian Defence Forces (HOS) in Bosnia and Herzegovina, the fall of the areas of Posavina, Bosanski Brod, and Jajce into the hands of the Army of Republika Srpska (VRS), and after a major battle broke out between the HVO and the ARBiH in Prozor.