Franjo Tuđman was a Croatian politician and historian who became the first president of Croatia, from 1990 until his death. He served following the country's independence from Yugoslavia. Tuđman also was the ninth and last president of the Presidency of SR Croatia from May to July 1990.
The United Nations Transitional Administration for Eastern Slavonia, Baranja and Western Sirmium (UNTAES) was a UN peacebuilding transitional administration in the Eastern Slavonia, Baranja and Western Syrmia in the eastern parts of Croatia. The transitional administration lasted between 1996 and 1998. The transitional administration was formally established by the United Nations Security Council Resolution 1037 of January 15, 1996. The transitional administration was envisaged and invited in the November 1995 Erdut Agreement between the Croatian Government and the representatives of the local Serb community in the region. At the time of UNTAES deployment the region already hosted another traditional type UN peacekeeping mission known as the UNCRO. While the region was covered under the UNCRO's sector east, the whole UNCRO mission was brought into question by the Operation Storm escalation of hostilities.
Vukovar-Srijem County, Vukovar-Sirmium County or Vukovar-Syrmia County, named after the eponymous town of Vukovar and the region of Syrmia, is the easternmost Croatian county. It includes the eastern parts of the region of Slavonia and the western parts of the region of Syrmia, as well as the lower Sava river basin, Posavina and Danube river basin Podunavlje. Due to the overlapping definitions of geographic regions, division on Slavonia and Syrmia approximately divides the county vertically into north-west and south-east half, while division on Posavina and Podunavlje divides it horizontally on north-east and south-west half.
The Republic of Serbian Krajina or Serb Republic of Krajina, known as the Serbian Krajina or simply Krajina, was a self-proclaimed Serb proto-state, a territory within the newly independent Republic of Croatia, which it defied, and which was active during the Croatian War of Independence (1991–95). It was not recognized internationally. The name Krajina ("Frontier") was adopted from the historical Military Frontier of the Habsburg monarchy (Austria-Hungary), which had a substantial Serb population and existed up to the late 19th century. The RSK government waged a war for ethnic Serb independence from Croatia and unification with the Federal Republic of Yugoslavia and Republika Srpska.
The Serbian Autonomous Oblast of Eastern Slavonia, Baranja and Western Syrmia was a self-proclaimed Serbian Autonomous Oblast (SAO) in eastern Croatia, established during the Yugoslav Wars. It was one of three SAOs proclaimed on the territory of Croatia. The oblast included parts of the geographical regions of Slavonia, Baranja, and Syrmia along the Croatian section of the Danube river Podunavlje region.
The Croatian War of Independence was an armed conflict fought from 1991 to 1995 between Croat forces loyal to the Government of Croatia—which had declared independence from the Socialist Federal Republic of Yugoslavia (SFRY)—and the Serb-controlled Yugoslav People's Army (JNA) and local Serb forces, with the JNA ending its combat operations in Croatia by 1992.
The Z-4 Plan was a proposed basis for negotiations to end the Croatian War of Independence with a political settlement. It was drafted by Peter W. Galbraith, Leonid Kerestedjiants and Geert-Hinrich Ahrens on behalf of a mini-Contact Group comprising United Nations envoys and diplomats from the United States, Russia and the European Union. The co-chairs of the International Conference on the Former Yugoslavia, David Owen and Thorvald Stoltenberg, were closely involved in the political process surrounding the plan. The document was prepared in the final months of 1994 and early 1995 before being presented to Croatian President Franjo Tuđman and the leaders of the self-declared Republic of Serbian Krajina (RSK) on 30 January 1995. Tuđman was displeased with the proposal, but accepted it as a basis for further negotiations. However, the RSK authorities even refused to receive the document before UNPROFOR mandate status was resolved. According to later reactions, RSK leadership was not satisfied with the plan.
Erdut is a village and a municipality in eastern Croatia some 37 km east of the major city of Osijek. Lying on the border with neighbouring Serbia, it was the site of the signing of the 1995 Erdut Agreement, which initiated the UNTAES transitional administration over the Eastern Slavonia, Baranja and Western Syrmia.
Goran Hadžić was a Croatian Serb politician and President of the self-proclaimed Republic of Serbian Krajina, during the Croatian War of Independence. He was accused of crimes against humanity and of violation of the laws and customs of war by the International Criminal Tribunal for the former Yugoslavia.
The Lovas killings involved the killing of 70 Croat civilian residents of the village of Lovas between 10 and 18 October 1991, during the Croatian War of Independence. The killings took place during and in the immediate aftermath of the occupation of the village by the Yugoslav People's Army (JNA) supported by Croatian Serb forces and Dušan the Mighty Forces. on 10 October, two days after Croatia declared independence from Yugoslavia. The occupation occurred during the Battle of Vukovar, as the JNA sought to consolidate its control over the area surrounding the city of Vukovar. The killings and abuse of the civilian population continued until 18 October, when troops guarding a group of civilians forced them to walk into a minefield at gunpoint and then opened fire upon them.
Island of Šarengrad is a Danube river island situated close to the village of Šarengrad in Croatia. It covers an area of 9 km2 (3.5 sq mi).
The Island of Vukovar is a disputed island on the river Danube. It is situated close to the city of Vukovar, Croatia.
Eastern Slavonia, Baranja and Western Syrmia, commonly abbreviated as Eastern Slavonia, was a short-lived Serb parallel entity in the territory of Croatia along the Danube river.
Dalj is a village on the Danube in eastern Croatia, near the confluence of the Drava and Danube, on the border with Serbia. It is located on the D519 road, south of its intersection with the D213 road and the Vukovar–Erdut railway.
The Erdut killings were a series of murders of 37 Hungarian and Croat civilians in the village of Erdut, Croatia committed by Croatian Serb forces and Serb Volunteer Guard paramilitaries between November 1991 and June 1992, during the Croatian War of Independence. Twenty-two Hungarians and 15 Croats were killed. The first killings occurred on 10 November 1991, when twelve civilians died. Eight more were killed over the following several days. Five more civilians were killed on 10 December, and another seven on 16 December. Four others were killed on 21 February 1992 and the final one was killed on 3 June. The bodies of these victims were either buried in mass graves or thrown into nearby wells.
The Erdut Agreement, officially the Basic Agreement on the Region of Eastern Slavonia, Baranja and Western Sirmium, is an agreement reached on 12 November 1995 between the authorities of the Republic of Croatia and the local Serb authorities of the Eastern Slavonia, Baranja and Western Syrmia region on the peaceful resolution to the Croatian War of Independence in eastern Croatia. It effectively ended the ethno-nationalist conflict in the region and initiated the process of peaceful reintegration of the region to central government control. The reintegration was directly implemented by the United Nations. The agreement provided a set of guarantees on human and minority rights as well as on the refugee return. It was named after Erdut, the village in which it was signed by local Serb representatives.
The Joint Council of Municipalities in Croatia is an elected consultative sui generis body which constitutes a form of cultural self-government of Serbs in the eastern Croatian Podunavlje region. The body was established in the initial aftermath of the Croatian War of Independence as a part of the international community's efforts to peacefully settle the conflict in self-proclaimed Eastern Slavonia, Baranya and Western Syrmia. The establishment of the ZVO was one of the explicit provisions of the Erdut Agreement which called upon the United Nations to establish its UNTAES transitional administration.
The 1991 Yugoslav campaign in Croatia was a series of engagements between the Yugoslav People's Army (JNA), the Yugoslav Navy and the Yugoslav Air Force, and the Croatian National Guard (ZNG) then the Croatian Army (HV) during the Croatian War of Independence. The JNA was originally deployed in order to preserve Yugoslavia, and the initial plan of the campaign entailed the military occupation of Croatia and the removal of the Croatian leadership elected in 1990. The JNA intervention was the culmination of its involvement in the confiscation of weapons from Croatia's Territorial Defence, and in the Croatian Serb revolt that had begun in August 1990. From that time, the JNA had been frequently deployed to form a buffer zone between the Croatian Serb guerrillas and the ZNG or the Croatian police. In effect, these JNA buffer zones often secured the territorial gains of the insurgents and led to an increasingly hostile relationship between the JNA and Croatia. The JNA campaign plan was amended shortly before the campaign to include the relief of JNA barracks besieged by the ZNG. The besieging and subsequent capture of several JNA facilities allowed Croatia to arm its previously poorly equipped military and to equip and recruit new ethnic Croat conscripts and officers of the Yugoslav People's Army.
The Serbs of Vukovar are one of traditional communities living in the multicultural, multi-ethnic and multi-confessional eastern Croatian town of Vukovar on the border with Serbia. The Serb community constitutes slightly over one third of the entire population of Vukovar according to 2011 Census. Other significant communities include the Croat majority, as well as Hungarians, Slovaks, Rusyns, Ukrainians and historically Yugoslavs, Germans, Jews, Vlachs and Turks.
1997 Eastern Slavonia integrity referendum was held on 6 April in short-lived Serb parallel entity of Eastern Slavonia, Baranja and Western Syrmia which at the time was already governed by the United Nations Transitional Administration for Eastern Slavonia, Baranja and Western Sirmium (UNTAES) as an UN governed territory. Voters were asked whether they supported the proposal for the region of Eastern Slavonia to remain a single territorial oblast within Croatia after the end of UNTAES mandate instead of division into Vukovar-Syrmia and Osijek-Baranja County. Reportedly 99.01% or 99.5% of voters voted for the integrity of the region within Croatia. 77,40% out of 100.275 registered voters participated in the referendum.
Croatia 
Eastern Slavonia, Baranja and Western Sirmium
Serbian Krajina 
UN Administration of Eastern Slavonia, Baranja and Western Sirmium (UNTAES)