Operation Jackal
Part of theBosnian War and theCroatian War of Independence
Dubrovnik Metković Mostar Stolac Čapljina Location of Mostar, Stolac and Čapljina in Bosnia and Herzegovina and in relation to Dubrovnik
Date 7 – 26 June 1992 Location Bosnia and Herzegovina Result Croatian victory
Belligerents
Croatia Herzeg-Bosnia	Republika Srpska
Commanders and leaders
Janko Bobetko	Radovan Grubač
Units involved
Croatian Army Croatian Defence Council	Army of Republika Srpska
Strength
4,670 soldiers	Unknown

Operation Jackal (Serbo-Croatian:Operacija Čagalj, also known asOperation June Dawns (Operacija Lipanjske zore), was an offensive of theBosnian War fought between a combinedCroatian Army (HV) andCroatian Defence Council (HVO) army against theArmy of Republika Srpska (VRS) from 7–26 June 1992. The offensive was aCroatian pre-emptive strike against the VRS, aBosnian Serb military formed in May 1992 fromYugoslav People's Army (JNA) units that were stationed inBosnia and Herzegovina. The HV concluded that the JNA offensive operations of April and May 1992, resulting in thecapture of Kupres and much of theNeretva River valley south ofMostar, were aimed at capturing or threatening the CroatianPort of Ploče and possiblySplit. To counter this threat, the Croatian leadership deployed the HV, under the command ofGeneralJanko Bobetko, to the "Southern Front" including the area in which Operation Jackal was to be conducted.

The offensive marked the first significant Bosnian Serb defeat in the war and placed the HV in a favourable position to push back the VRS and remnants of the JNA holding positions north and east ofDubrovnik. The HV later re-established overland links with the city which had been undersiege by the JNA since late 1991. The attack resulted in an HV/HVO victory and the capture of approximately 1,800 square kilometres (690 square miles) of territory in and around Mostar andStolac.

In August 1990, aSerbianuprising occurred in Croatia centred on theDalmatian hinterland around the city ofKnin,^[1] parts of theLika,Kordun, andBanovina regions, as well as in settlements ineastern Croatia with significant Serb populations.^[2] The areas were subsequently named theRepublic of Serbian Krajina (RSK). The RSK, supported bySerbia,^[3] declared its intention to integrate with Serbia, and was denounced by theGovernment of Croatia as a rebellion.^[4] Tensions rose and by March 1991 theCroatian War of Independence had broken out.^[5] With thedisintegration of Yugoslavia, in June 1991 Croatia issued itsdeclaration of independence^[6] which became official on 8 October^[7] after a three-month moratorium.^[8] The RSK then initiated a campaign ofethnic cleansing against Croatian civilians and most non-Serbs were expelled by early 1993.^[9][10]

In May 1991, theCroatian National Guard (ZNG), subsequently renamed theCroatian Army (HV) in November,^[11] was formed as a result of growing support for the RSK from theYugoslav People's Army (JNA) and the inability of theCroatian Police to cope with the situation.The establishment of themilitary of Croatia was hampered by a UNarms embargo introduced in September.^[12] The final months of 1991 saw the fiercest fighting of the war culminating in theBattle of the Barracks,^[13] theSiege of Dubrovnik,^[14] and theBattle of Vukovar.^[15]

In January 1992, theSarajevo Agreement was signed by representatives of Croatia, the JNA and the UN, and a ceasefire called.^[16] After a series of unsuccessful ceasefires, theUnited Nations Protection Force (UNPROFOR) was deployed to Croatia to supervise and maintain the agreement.^[17] The conflict largely passed on to entrenched positions, and the JNA soon retreated from Croatia intoBosnia and Herzegovina, where a new conflict was anticipated.^[16]

As theYugoslav People's Army (Jugoslavenska narodna armija – JNA) withdrew from Croatia following the acceptance and start of implementation of theVance plan, its 55,000 officers and soldiers born in Bosnia and Herzegovina were transferred to a newBosnian Serb army, which was later renamed theArmy of Republika Srpska (VRS). This reorganisation followed the declaration of the Serbian Republic of Bosnia and Herzegovina on 9 January 1992, ahead of the 29 February – 1 March 1992 referendum on independence of Bosnia and Herzegovina. This declaration would later be cited as a pretext for theBosnian War.^[18] Bosnian Serbs began fortifying the capital,Sarajevo, and other areas on 1 March. On the following day, the first fatalities of the war were recorded in Sarajevo andDoboj. In the final days of March, the Bosnian Serb army bombardedBosanski Brod with artillery, drawing a border crossing by the HV 108th Brigade in response.^[19] On 4 April, JNA artillery began shelling Sarajevo.^[20] The JNA and the VRS in Bosnia and Herzegovina faced theArmy of the Republic of Bosnia and Herzegovina (ARBiH) and theCroatian Defence Council (HVO), reporting to theBosniak-dominated central government and theBosnian Croat leadership respectively, as well as the HV, which occasionally supported HVO operations.^[19]

In April 1992, the JNA renewed offensive operations against the HV and the HVO in areas of western and southernHerzegovina nearKupres andStolac. The JNA's 2nd Military District, commanded byColonel GeneralMilutin Kukanjac, deployed elements of the 5thBanja Luka Corps and the 9th Knin Corps to the Kupres region, capturing the town from the HV and the HVO jointly defending the area in the1992 Battle of Kupres on 7 April and threateningLivno andTomislavgrad to the southwest. The 4th Military District of the JNA, commanded byGeneralPavle Strugar, employed the 13thBileća Corps and the 2ndTitograd Corps to capture Stolac and most of the eastern bank of theNeretva River south ofMostar.^[21] The fighting around Mostar and JNA artillery attacks on the city started on 6 April, with the town ofŠiroki Brijeg coming under attack by theYugoslav Air Force on 7–8 April.^[22] While a Croatian attack of 9 April failed to capture a JNA-controlled airfield in Mostar, the Bosnian SerbTerritorial Defence Force captured two nearbyhydroelectric power plants on the Neretva River and the JNA pushed the HV/HVO force from Stolac on 11 April.Čapljina, 25 kilometres (16 miles) southwest from Mostar, came under intermittent JNA artillery and air attacks.^[23] A ceasefire was arranged on 7 May, but the JNA and the Bosnian Serb forces resumed the attack the next day.^[23] The attack succeeded in capturing a large part of Mostar and some territory on the west bank of the Neretva River.^[21] On 12 May, the transfer of JNA forces based in Bosnia and Herzegovina to the VRS was completed,^[24] and those JNA units which had not been transferred to the VRS withdrew from Bosnia and Herzegovina to the newly declaredFederal Republic of Yugoslavia^[25]

While the JNA planned the offensive to pre-empt a Croatian attack on Serb-held territory, Croatia saw the moves as a prelude to JNA attacks on southern Croatia, specifically aimed at thePort of Ploče and possiblySplit.^[26] To counter the perceived threat, the HV deployed additional troops to the area redesignated as the "Southern Front". HV GeneralJanko Bobetko, appointed to command the Southern Front, reorganised the HVO command structure and assumed command of the HVO in the area to stop the expected JNA/VRS offensive and regain the lost territory along the Neretva River. In late May, Bobetko launched an attack along theAdriatic coast, and in its immediatehinterland, towards besiegedDubrovnik linking up with the HV force in the city and breaking the JNA encirclement of the city by 1 June. The attack coincided with a JNA withdrawal towardsDubrovnik Airport inKonavle and positions within Bosnia and Herzegovina borders,^[27] 2 to 10 kilometres (1.2 to 6.2 miles) away from the coast.^[28] On 23 May, the HV/HVO captured the Hum Mountain south of Mostar.^[23]

The HV and the HVO committed 4,670 troops to Operation Jackal.^[29] The HVO deployed various units stationed or raised in the area, mostly drawn from Mostar, Široki Brijeg, and Čitluk. The HV contributed the4th Guards Brigade, elements of the 116th Infantry Brigade and the 156th Infantry Brigade. The HV troops were deployed around Čapljina, for the main attack across the Neretva River and on the right flank of the axis, while the HVO troops were deployed to their left, as well as in the Čapljina area. The VRS Herzegovina Corps (former JNA 13th Bileća Corps), commanded byMajor General Radovan Grubač, consisted of the 10th and 13th Brigades as well asLjubinje Territorial Defence troops in the area of Mostar and Stolac.^[30][31]

Operation Jackal, or alternatively Operation June Dawns,^[29] commenced on 7 June 1992. The attacking HV/HVO force moved east and north from Čapljina towards Stolac and Mostar aiming to push the VRS back from the Neretva River and capture positions around Mostar. The HV/HVO force captured the first objective of the offensive, the town ofTasovčići located across the Neretva River, opposite Čapljina, on 8 June.^[32] The HV component of the force which captured Tasovčići, the 156th Infantry Brigade, was detached from the force tasked with continued advance to captureKlepci andPrebilovci to protect the right flank of the Neretva bridgehead.^[33] The HV 116th Infantry Brigade held the Neretva River valley south of the bridgehead and east ofMetković.^[34]

As the VRS Herzegovina Corps positions around Tasovčići collapsed, the attacking forces were able to quickly move east along its planned line of advance.^[32] On 11 June, the Mostar HVO forces attacked VRS positions on the west bank of the Neretva River, south of the city of Mostar in support of the main attack. The advance was immediately successful, capturing the villages of Varda, Kruševo,Jasenica, Slipčići and the Orlovac Mountain.^[23] The HVO captured JNA/VRS Heliport Barracks in Mostar the same day.^[29] On 12 June, the HVO pushed all remaining VRS forces east across the river.^[35]

The 1st Herzegovina Brigade of the HVO and the 156th Infantry Brigade advanced northeast from Čapljina and captured villages ofBivolje Brdo andLokve ten kilometres (6.2 miles) away from the Neretva crossing point. The 116th Infantry Brigade, spearheading the Tactical Group-2, consisting of the brigade and supporting HVO troops, staged a rapid breakthrough and reached outskirts of Stolac, approximately 20 kilometres (12 miles) east of the Neretva crossing.^[36] The advance northeast towards Mostar continued north through Pijesci andGubavica and reached the southern approaches to Mostar on 14 June. HVO units attacking from Čapljina secured Stolac by capturing VRS positions in Hodovo, approximately eight kilometres (5.0 miles) north of Stolac, on 15 June. The same day, the 4th Battalion of the Mostar HVO captured JNA "Sjeverni logor" barracks in Mostar while other elements of the HVO Mostar force captured nearby Fortica Hill overlooking the city.^[29] The final part of the northward advance of the force that set off from Čapljina was routed through the villages ofBuna andBlagaj,^[32] which were also captured on 15 June.^[29] In order to complete a link up with the advancing HV and HVO units, the Mostar HVO forces, supported by the HV's 4th Battalion of the 4th Guards Brigade, moved south from the city through Jasenica.^[36] The two advancing forces met at theMostar International Airport on 17 June.^[32]

The HV and the HVO completely pushed the VRS from Mostar, advancing further east along the slopes of theVelež Mountain and capturing high ground overlooking the city by 21 June. The ARBiH supported the eastward push from the city only in a secondary role. Even though the front lines did not move significantly to the east, the city of Mostar was relatively secure from future VRS attacks.^[32] The offensive is considered to have ended on 26 June, when the HVO captured the Merdžan Glava peak of the Velež Mountain.^[29]

The HV and the HVO captured approximately 1,800 square kilometres (690 square miles) of territory during Operation Jackal, and the supporting attacks around Mostar, as well as handing the VRS their first significant defeat in the Bosnian War.^[29] The offensive removed a direct threat posed by the JNA and the VRS to Metković,^[37] and it accomplished the Croatian objective of capturing positions that were favourable to staging further offensives against JNA and VRS forces still positioned near Dubrovnik. The follow-upOperation Tiger was the first HV offensive to exploit the success of Operation Jackal and improve Croatian military positions on the Southern Front in general but specifically around Dubrovnik.^[32] HV deployment to Bosnia and Herzegovina not only gained them significant experience in the execution of large-scale military offensives,^[38] but also denied the Bosnian Serb VRS forces the chance to pursue a decisive victory.^[39]

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43°05′N17°58′E / 43.08°N 17.96°E /43.08; 17.96

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