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Battle of Osijek

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Title: Battle of Osijek  
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Subject: Battle of the Dalmatian Channels, Baćin massacre, Operation Whirlwind, Battle of the Miljevci Plateau, Operation Tiger (1992)
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Battle of Osijek

The Battle of Osijek (Croatian: Bitka za Osijek) was the artillery bombardment of the Croatian city of Osijek by the Yugoslav People's Army (JNA) which took place from August 1991 to June 1992 during the Croatian War of Independence. Shelling peaked in late November and December 1991, then diminished in 1992 after the Vance plan was accepted by the combatants. Airstrikes and attacks by JNA infantry and armored units against targets in the city accompanied the bombardment, which caused approximately 800 deaths and resulted in a large portion of the city's population leaving. Croatian sources estimated that 6,000 artillery shells were fired against Osijek over the period.

After the JNA captured Vukovar on 18 November 1991, Osijek was the next target for its campaign in Croatia. The JNA units subordinated to the 12th (Novi Sad) Corps, supported by the Serb Volunteer Guard, achieved modest advances in late November and early December, capturing several villages south of Osijek, but the Croatian Army maintained its defensive front and limited the JNA's advances. In the aftermath of the Battle of Osijek, Croatian authorities charged thirteen JNA officers with war crimes against civilians, but no arrests have been made to date.


In 1990, following the electoral defeat of the government of the Socialist Republic of Croatia, ethnic tensions worsened. The Yugoslav People's Army (Jugoslovenska Narodna Armija – JNA) confiscated the weapons of Croatia's Territorial Defence (Teritorijalna obrana – TO) to minimize potential resistance.[1] On 17 August 1990, the escalating tensions turned into open revolt by the Croatian Serbs.[2] The revolt took place in the predominantly Serb-populated areas of the Dalmatian hinterland around Knin [3]and in parts of the Lika, Kordun, Banovina regions and eastern Croatia.[4] In January 1991, Serbia, supported by Montenegro and Serbia's provinces of Vojvodina and Kosovo, made two unsuccessful attempts to obtain approval from the Yugoslav Presidency to deploy the JNA to disarm Croatian security forces.[5]

After a bloodless skirmish between Serb insurgents and Croatian special police in March,[6] the JNA itself, supported by Serbia and its allies, asked the federal Presidency to grant it wartime powers and declare a state of emergency. The request was denied on 15 March 1991,[7] and the JNA came under the control of Serbian President Slobodan Milošević in the summer of 1991 as the Yugoslav federation started to fall apart.[8] By the end of the month, the conflict had escalated, resulting in the first fatalities of the war.[9] The JNA then stepped in to support the insurgents and prevent Croatian police from intervening.[7] In early April, leaders of the Serb revolt in Croatia announced their intention to integrate the areas under their control with Serbia. The Government of Croatia considered this an act of secession.[10]


Map showing the fighting in eastern Slavonia, September 1991 – January 1992; Osijek is located in the bulge (salient) near the top of the map

The JNA intervened directly against Croatia for the first time on 3 July 1991, driving Croatian forces out of Baranja, north of the city of Osijek,[11] and out of Erdut, Aljmaš and Dalj east of Osijek.[12] The advance was followed by intermittent fighting around Osijek, Vukovar and Vinkovci.[13] At several points, JNA positions approached to within several hundred yards of Osijek city limits.[14]

The JNA units near Osijek were subordinated to the 12th (Novi Sad) Corps,[15] commanded by Major General Andrija Biorčević.[16] In the city itself, the JNA had several barracks which housed the 12th Proletarian Mechanised Brigade and the 12th Mixed Artillery Regiment.[17] The 12th Proletarian Mechanised Brigade contained one of a handful battalions maintained by the JNA at full combat readiness.[18] Osijek was established as their starting point in a planned westward offensive toward Našice and Bjelovar.[15]

Croatian forces in the area were formally subordinated to the Operational Zone Command in Osijek headed by Colonel Karl Gorinšek.[19] In practice, the city's defense was overseen by Branimir Glavaš, then head of the National Defence Office in Osijek, according to information presented at Glavaš trial in the 2000s. Glavaš formally became commander of city defenses on 7 December 1991.[20]

The JNA first attacked Osijek by mortar fire on 31 July 1991,[21] and heavily bombarded the city's center on 19 August 1991.[22] The attacks came from positions north, east and south of Osijek,[23] and were supported by JNA garrisons stationed in Osijek itself.[24] On 7–9 September, an inconclusive battle was fought in Tenja, within three kilometres (1.9 miles) of the city.[25] The JNA garrisons were besieged by Croatian forces in mid-September. After a barracks in the city centre was captured on 15 September 1991,[26] the remaining JNA garrison tried to break through the Croatian troops besieging the barracks and, after heavy fighting, reached JNA positions south of Osijek on 17 September 1991.[17] The intensity of the shelling increased thereafter, peaking through November and December. After a ceasefire was arranged in January 1992, following the acceptance of the Vance plan, the artillery attacks dropped off and became intermittent,[27] and ceased by June.[23]

After JNA captured Vukovar on 18 November, the JNA 12th (Novi Sad) Corps, supported by the Serbian Ministry of Interior-trained Serb Volunteer Guard paramilitaries,[28][29] started to advance west between Vinkovci and Osijek on 20 November.[28] The city of Osijek appeared to be the next target of the JNA,[30] which was later confirmed by General Života Panić, commander of the JNA 1st Military District.[31]

On 21 November 1991, the JNA captured the villages of Stari Seleš, Novi Seleš and Ernestinovo situated approximately ten kilometres (6.2 miles) south of Osijek. Laslovo, five kilometres (3.1 miles) south of Ernestinovo, was captured three days later. Those developments threatened Đakovo and pointed to the potential encirclement of Osijek.[12] On 4 December 1991, the Special Envoy of Secretary-General of the United Nations Cyrus Vance visited Osijek to inspect the damage.[32] In early December, the JNA made modest advances, capturing Antunovac located six kilometres (3.7 miles) south of Osijek on 5 December 1991.[12] On the same day, an armoured JNA force unsuccessfully attacked positions held by the Croatian 106th Brigade in Rosinjača Forest near Nemetin, approximately two kilometres (1.2 miles) east of Osijek.[33] On 6 December, the JNA pushed Croatian troops out from Tenja. The JNA captured Paulin Dvor, less than three kilometres (1.9 miles) kilometers west from Ernestinovo, on 16 December.[12] The Croatian Army managed to contain the JNA attacks, even though the fighting continued south of Osijek until January 1992.[28]

During its height, the intensity of the bombardment was reported to reach as high as one shell per minute,[34] and the artillery attacks were compounded by Yugoslav Air Force strikes against the city.[35] According to Croatian sources, a total of 6,000 artillery shells were fired against Osijek in the period.[36] Prior to the start of the bombardment, the civilian population of Osijek totaled 104,761 city residents and 129,792 municipal residents.[37] These numbers were significantly reduced as civilians fled the fighting. It is estimated that only about a third of the population remained in the city by the end of November,[38] with some sources placing the estimate even lower, suggesting that the population of the city was reduced to just 10,000 civilians during the most intense periods of the bombardment.[39] Those who remained in Osijek through the fighting generally slept in bomb shelters.[14]


Partially repaired bombardment damage in Osijek

By June 1992, approximately 800 people had been killed by the bombardment.[27] By the end of the Croatian War of Independence in 1995, a total of 1,724 people from Osijek had been killed, including 1,327 soldiers and 397 civilians.[40] The city itself suffered great damage during the war, with the bulk of direct damage occurring as a consequence of the 1991–92 bombardment.[41] Direct war damage sustained by the city was estimated at a total of US$1.3 billion.[42] The damage was regularly recorded by 400 volunteers during the bombardment.[43]

Although media reported on the bombardment of Osijek, journalists in the city itself felt that it was receiving an unduly low level of media coverage compared to wartime events elsewhere in Croatia.[44] The attacks on Osijek were welcomed by the Pravoslavlje newspaper published by the Serbian Orthodox Church, which appeared to give a blessing to the attack as a part of a "holy war", setting it in the context of World War II massacres and concentration camps in the Independent State of Croatia.[45]

In 2008, Croatian authorities formally charged Colonel Boro Ivanović, commanding officer of the JNA 12th Proletarian Mechanised Brigade, and twelve other JNA officers with war crimes against the civilian population. The charges include causing the deaths of 307 civilians in Osijek and surrounding areas, injuries to another 171 civilians, and the destruction of at least 1,188 different structures. As of 2013, all of the indicted officers remain at large in Serbia.[46] Glavaš and five other persons had been charged and convicted of eleven counts of murder, one of attempted murder, and one of torture of Serb civilians found in the JNA barracks, which surrendered on 15 September. Glavaš was handed a sentence of ten years in prison and the remainder received prison sentences of between five to eight years.[26][47] To avoid extradition, before the conviction became final Glavaš fled to Bosnia and Herzegovina, having been granted citizenship. His sentence was reduced to eight years and became final in 2010, when he was arrested and imprisoned in Bosnia and Herzegovina.[48]

The JNA withdrew from Croatia in 1992, but continued to contribute personnel and equipment to the Army of the Republic of Serbian Krajina (ARSK) in the areas previously held by the JNA.[49] Although the United Nations Protection Force peacekeepers deployed to the area on the basis of the Vance plan and placed most of the ARSK heavy weapons in storage,[50] Osijek was intermittently bombarded throughout the war—the last artillery strike occurred in September 1995.[51] The hostilities ceased in November 1995 through the Erdut Agreement securing restoration of Croatian rule in the region.[52]



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