

The final months of 1991 saw the fiercest fighting of the war, culminating in the Battle of the Barracks, the Siege of Dubrovnik, and the Battle of Vukovar. The establishment of the military of Croatia was hampered by a UN arms embargo that had been introduced in September. In November the same year, the ZNG was renamed the Croatian Army (Croatian: Hrvatska vojska, HV). The Croatian National Guard ( Croatian: Zbor narodne garde, ZNG) was formed in May 1991 because the Yugoslav People's Army ( Serbo-Croatian: Jugoslovenska Narodna Armija, JNA) increasingly supported the RSK and the Croatian Police were unable to cope with the situation. A three-month moratorium on the declarations of independence by Croatia and the RSK followed, but both declarations came into effect on 8 October. In June 1991, Croatia declared its independence as Yugoslavia disintegrated. By March 1991, the conflict had escalated, resulting in the Croatian War of Independence. After the RSK declared its intention to join Serbia, the Government of Croatia declared the RSK a rebel organization. These areas were subsequently declared to be the Republic of Serbian Krajina (RSK). It centred on the predominantly Serb-populated areas of the Dalmatian hinterland around the city of Knin, parts of the Lika, Kordun, and Banovina regions, and settlements in eastern Croatia with significant Serb populations. In August 1990, an insurgency known as the Log Revolution took place in Croatia. Main article: Croatian War of Independence The parties failed to completely implement the remaining major aspects of the Vance plan. The Implementation Agreement, signed in Sarajevo, Bosnia and Herzegovina, by JNA Lieutenant Colonel General Andrija Rašeta and Croatian defence minister Gojko Šušak, produced a longer-lasting ceasefire, which was supervised by the United Nations Protection Force (UNPROFOR). Because the ceasefire agreed at that time did not hold, further negotiations resulted in the Implementation Agreement of 2 January 1992. The first agreement, known as the Geneva Accord, was signed by Yugoslav defence minister General Veljko Kadijević, President of Serbia Slobodan Milošević and Croatian President Franjo Tuđman in Geneva, Switzerland, on 23 November 1991. The Vance plan consisted of two agreements. The plan was designed to implement a ceasefire, demilitarize parts of Croatia that were under the control of Croatian Serbs and the Yugoslav People's Army (JNA), allow the return of refugees, and create favourable conditions for negotiations on a permanent political settlement of the conflict resulting from the breakup of Yugoslavia. At that time, Vance was the Special Envoy of the Secretary-General of the United Nations he was assisted by United States diplomat Herbert Okun during the negotiations. The Vance plan ( Croatian: Vanceov plan, Serbian: Vensov plan) was a peace plan negotiated by the former United States Secretary of State Cyrus Vance in November 1991 during the Croatian War of Independence.
