United Nations Protection Force The United Nations Protection Force ( UNPROFOR ) , was the first United Nations peacekeeping force in Croatia and in Bosnia and Herzegovina during the Yugoslav wars . It existed between the beginning of UN involvement in February 1992 , and its restructuring into other forces ( United Nations Preventive Deployment Force - UNPREDEP and United Nations Confidence Restoration Operation - UNCRO ) in March 1995 . In French , its name was FORPRONU ( " Force de Protection des Nations Unies " ) . Personnel . The UNPROFOR was composed of nearly 39 , 000 personnel , 320 of whom were killed on duty . It was composed of troops from Argentina , Australia , Bangladesh , Belgium , Brazil , Canada , Colombia , Czech Republic , Denmark , Egypt , Estonia , Finland , France , Germany , Ghana , India , Indonesia , Ireland , Italy , Jordan , Kenya , Lithuania , Luxembourg , Malaysia , Nepal , Netherlands , New Zealand , Nigeria , Norway , Pakistan , Poland , Portugal , the Russian Federation , Slovak Republic , Spain , Sweden , Switzerland , Tunisia , Turkey , Ukraine , the United Kingdom and the United States . The commanders of the UNPROFOR were : Prominent officers : Mandate . Croatia . UNPROFOR was created by UN Security Council Resolution 743 on 21 February 1992 during the Croatian War of Independence . The initial mandate of the UNPROFOR was to ensure conditions for peace talks , and security in three demilitarized " safe - haven " enclaves designated as United Nations Protected Areas ( UNPAs ) located in various regions before the Republic of Croatia was admitted into the UN as a member but were controlled by the self - styled Republic of Serbian Krajina . In 1992 , the mandate was extended to so - called " pink zones " controlling access to the UNPAs ( UNSC Resolution 762 ) , some border control and monitoring of civilian access to the Pink Zones ( UNSC Resolution 769 ) , and control of the demilitarisation of the Prevlaka peninsula near Dubrovnik ( UNSC Resolution 770 ) . Bosnia and Herzegovina . In contrast to that of Croatia , the UNPROFOR mandate for Bosnia and Herzegovina was not to monitor a preexisting cease - fire , but to keep the population alive while the war ended . The mandate can essentially be divided into four phases , but it is important to note that the old responsibilities continued even as new tasks were added . On 31 March 1995 , UNPROFOR was restructured into three coordinated peace operations . On 20 December 1995 the forces of the UNPROFOR were reflagged under the NATO led Implementation Force ( IFOR ) whose task was to implement the General Framework Agreement for Peace in Bosnia and Herzegovina ( GFAP — otherwise known as the Dayton Accords or Dayton Agreement ) . Course of Action . February 1992 – March 1993 . Cedric Thornberry was director of UNPROFOR Civil Affairs at the beginning of the mission in February 1992 . By the end of its first mandate in March 1993 , UNPROFOR had had some success in restoring peace in Croatia , notably obtaining the removal of the Yugoslav People ' s Army ( JNA ) in May 1992 . However , civil unrest was such that terror , discrimination and " ethnic cleansing " were still present . Local Serb forces managed to complete their cleansing of the UNPA areas , started in 1991 , that left only 279 Croats there out of a pre - war population of 102 , 000 . The situation was problematic mostly because of the non - cooperation of local Serb authorities , and because of later major Croat military offensives . Additionally , the situation for which the UNPROFOR had been designed had significantly changed . The Croat part now refused to negotiate its sovereignty on the UNPAs and Pink Zones , which the Serb part would not accept . Establishment of the " Republic of Serbian Krajina " further complicated the situation . The Opening of the Sarajevo Airport was conducted by the Canadian Operational Force , which moved within the Theater of Operations from Croatia ( Surac ) to the combat zone of Sarajevo . The Canadian Force included the French - speaking Royal 22 Régiment , with the attachment of N Company of the English - speaking 3rd Battalion , The Royal Canadian Regiment . The Canadian Contingent was deployed by train from Canadian Forces Base Baden - Soellingen and CFB Lahr , Germany . In spite of hostile actions , Sarajevo international airport had successfully remained open . In the period from 3 July 1992 to 31 January 1993 , the humanitarian airlift organised by UNHCR under UNPROFOR protection brought in 2 , 476 aircraft carrying 27 , 460 tons of food , medicines and other relief goods . Distribution of humanitarian aid was disrupted due to non - cooperation and even hostile actions ( mines , small arms fire , RPG ) of the parties in the field , especially from the Bosnian Serb forces . Nonetheless , from November 1992 to January 1993 , a total of some 34 , 600 tons of relief supplies had been delivered to an estimated 800 , 000 beneficiaries in 110 locations throughout Bosnia and Herzegovina . March 1993 – February 1994 . Croat incursions . On the 6 July 1993 , new tensions arose following the Croatian government ' s decision to re - open the strategic Maslenica bridge on 18 July - Croatia was cut in half while the bridge was in Serb hands . The UNPROFOR mandated to monitor the withdrawal of Croatian forces from the area had been unable to deploy , due to the refusal of access by Croat authorities . The Serbs shelled the bridge which was partially destroyed on 2 August . On 12 August , negotiations for a cease - fire began in Geneva , but were unsuccessful . Eventually , Croat forces retreated to their positions of before the incursion . Operation " Deny Flight " . In mid - March , unidentified airplanes dropped bombs onto villages in the vicinity of Srebrenica violating the " No - Flight zones " for the first time . The Bosnian Serbs were blamed for the bombing but denied it . On 31 March , a resolution was voted authorising the nations contributing to the UNPROFOR to take " all necessary measures " to prevent military flights from the belligerents in the no - flight zones ( " Operation Deny Flight " ) . French , Dutch and American airplanes were deployed to enforce the resolution . In total , until 1 December 1994 , 3317 violations were observed . On 28 February 1994 , four military aircraft were shot down by NATO fighters over Bosnia and Herzegovina . Safe areas . From March 1993 , Serb para - military units killed a great number of civilians , destroyed habitations , prevented the UNHCR from delivering humanitarian aid , and forced thousands of Bosniak refugees to flee to the town of Srebrenica . 30 or 40 persons were dying daily from military action , starvation , exposure to cold or lack of medical treatment . Resolution 819 attempted to address this issue by declaring Srebrenica a " Safe Area " . Resolution 836 authorized UNPROFOR " acting in self - defense , to take the necessary measures , including the use of force , in reply to bombardments against the safe areas by any of the parties or to armed incursion into them or in the event of any deliberate obstruction in or around those areas the freedom of movement of UNPROFOR or of protected humanitarian convoys " . To implement the deterrence , around 7600 reinforcements were sent and air support was organised in coordination with NATO . War in Bosnia . In May 1993 , intense fighting broke out in Central Bosnia between Bosniaks and Bosnian Croats . Croat para - military forces , committed exactions against Serbs and Bosniaks . The massacre in the village of Ahmići , on 16 April 1993 , is an example of the savagery of the terror . Tihomir Blaškić was the officer of the Croat HVO army formation who was tried and convicted at the ICTY over his responsibility for this massacre . Blaškić served almost nine years in prison before the appeals panel acquitted him of most of the charges in July 2004 , as the defence proved that he did not command all the HVO units in the area or any paramilitary units . On 24 September , the Security Council was informed by the Croatian Government that if the mandate of UNPROFOR was not amended to promote energetic implementation of the relevant resolutions of the Security Council , Croatia would be forced to request UNPROFOR to leave the country not later than 30 November 1993 . Subsequent redefinition of the mandate occurred . At the end of the year , the warring parties attempted to come to a cease - fire . The truce was implemented between Croat and Serb forces , but fighting went on in Bosnia between Bosniaks and Croats , and the humanitarian situations continued to deteriorate . Notably , Sarajevo continued to be bombarded by Bosnian Serb forces . It was also reported that units of the regular Croat army were supporting Bosnian Croat forces with heavy equipment and men , removing their insignias . This led to further protests from the UN . Use of force began to be discussed at a NATO summit held in Brussels on 10 and 11 January 1994 . The Bosnian Serbs , following talks with high - ranking officials of the Russian Federation in Moscow , agreed to open the Tuzla airport for humanitarian purposes . At the same time , the relieving of UN troops in Srebrenica was allowed and the Canadian contingent was replaced by a Dutch contingent . The situation in Sarajevo , however , remained extremely tense , with Bosnian Serb sniper fire deliberately aimed at civilians , and artillery and heavy mortar fire aimed at population areas . This strongly shaped Western public opinion , as a number of journalists were operating in Sarajevo , and murdered civilians were seen in the evening news on a regular basis . On 4 February 1994 , a mortar shell fired at a suburb of Sarajevo killed 10 people and wounded 18 . The next day , February 5 , 1994 , a mortar exploded in Sarajevo ’ s Markale market , leaving 68 dead and 200 injured in what was so far the bloodiest incident in Sarajevo in the 22 months of fighting . Exasperation at these provocations grew to the point where an ultimatum was sent , requiring the removal or surrender to the UNPROFOR of all heavy guns 20 km from Sarajevo ( Bosnian and Bosnian Serb , with an exception for Pale ) within ten days . The ultimatum was satisfied on 17 February , with the heavy weapons that were not removed being regrouped in seven UNPROFOR - controlled spots . On 23 February 1994 , the cease - fire was brokered between Croat and Bosnian forces - the Washington Agreement - which ended their one - year long war and united the sides as the Federation of Bosnia and Herzegovina . UNPROFOR ' s role in this was to monitor the cease - fire and in addition even helped to rebuild local infrastructure and staff checkpoints within the federation area . March 1994 – November 1994 . Positive developments and extension of mandate . On 24 March 1994 , a plan for the re - opening of the Tuzla airport , for UNPROFOR and humanitarian use only , was published . On 29 March 1994 , in Zagreb , representatives of the Government of Croatia and the local Serb authorities in UNPAs concluded a cease - fire agreement aiming to achieve a lasting cessation of hostilities . Concurrently , the mandate of the UNPROFOR was extended for another six months , and reinforcements were sent , amounting to 10 , 000 troops and a few hundred policemen and observers . During 1994 , UNPROFOR troops in Bosnia came under increased military attacks , resulting in several battle engagements ( Operation Bøllebank , Operation Amanda ) , with Bosnian Serb forces . Assault Against Safe Areas . Shortly after the cease - fire between Croat and Serb forces , the Bosnian Serbs launched an assault against the Safe area of Goražde , heavily shelling the town and surrounding villages . Protests and exhortations from the UN Security Council turned out to be ineffective , and on 10 and 11 April 1994 , NATO launched air strikes against Bosnian Serb positions . In retaliation , Bosnian Serb forces captured many UN personnel , using them as human shields at sites expected to be bombed . The bombings turned out to be much less effective than the recent Gulf War , which had conditioned the public ' s understanding of air strikes . In spite of the demonstration of power of the NATO , and protests of good faith from the Serbs , the shelling continued . In a similar situation to what had happened in Sarajevo , an ultimatum was issued , and by the 24th , most of the Serb troops had complied . These incidents led to another reflection about the status of the Safe Areas . Attempts at Peace . Several Peace Plans had been rejected ( the Carrington - Cutiliero plan , the Vance - Owen plan , the " HMS Invincible " package , the Owen - Stoltenburg plan , and the European Union Action Plan ) . At the end of July , a blueprint was designed by the Contact Group , consisting of the United States , Great Britain , France , Germany and Russia , which was accepted by the Croat , Serb and Bosnian parties . The Bosnian Serbs , however , refused the plan . In early August , in an attempt to coerce the Bosnian Serbs into accepting the plan , the Serbian government cut political and economic relationships with the Bosnian Serb leaders . This decision was welcomed by the UN Security Council . On 23 September , the UN Security Council officially welcomed the agreement of the warring parties to the peace plan , condemned the Bosnian Serb refusal , and strengthened the sanctions against the Bosnian Serb entity . Bosnian Serb Isolation . On 23 September 1994 , in retaliation to the Bosnian Serb obstruction to the Peace Plan , the Security Council , by its Resolution 942 , severed all commercial and monetary links to the Bosnian Serb entity . Notably , this cut the flow of fuel to the Bosnian Serbs , a hard strategic blow . Due to the extreme position taken by the Bosnian Serb government , the Yugoslav Federation ( Serbia and Montenegro ) itself had to take a strong stance against the Bosnian Serb entity . This led to the quasi - complete diplomatic isolation of the Bosnian Serb entity . Deterioration in Security . In August 1994 , the situation deteriorated again , particularly due to sniper activity , and despite the anti - sniper agreements . In Sarajevo , the bloody " Sniper Alley " became famous and infamous . Deliberate attacks against UNPROFOR personnel or aircraft became frequent . In October , the Bosnian Muslim forces , trapped in the Bihać pocket , attacked the Bosnian Serb forces in an attempt to end the siege of the city . The attack and the ensuing counter - attack by the Bosnian Serbs induced terror in the local population and another massive exodus of refugees . In deliberate contradiction with the " Safe Area " status of Bihać and the " No - flight " zones , Bosnian Serb airplanes made repeated attacks in the Bihać area , using cluster bombs and napalm . In reaction to this threat , on 21 November , NATO airplanes destroyed the Udbina airstrip , located in the UNPA Sector South in Croatia . The following days , NATO airplanes again had to intervene , against Bosnian Serb anti - air missiles sites which had opened fire upon British jets , and against artillery sites which shelled Bihać . Instead of lowering their profile , the Bosnian Serbs retaliated by taking UN personnel hostage and restraining humanitarian aid transit . On the diplomatic scene , all efforts to come to a cease - fire turned out to be to no avail , here again mostly because of Bosnian Serb obstruction — Dr . Karadžić declined the invitation of the UN Secretary - General . UN hostages and the Vrbanja bridge . On the 26 May 1995 following NATO air raids on Pale as the Bosnian Serbs defied another UN ultimatum on heavy weapons , around 400 Blue Helmet s were taken hostage , brought to strategic points as human shields , and shown in chains on Serbian TV . On the 27 May 1995 , General Mladić along with General Nuhić launched an assault against the UN observation point of the Vrbanja bridge . At 5 in the morning , the French captain commanding the position lost contact with the 12 men and went to investigate . A Serb dressed with a blue helmet and French body armour and uniform attempted to take him hostage , but was deterred by the escort , and the officer managed to escape . In the following hours , after intense shelling by ERC 90 Sagaie armoured vehicles , the French stormed the post , killing four Serbs and capturing four others . Two French soldiers were killed . At 12 o ' clock , the Bosnian Serb radio broadcast that General Mladić had ordered to On the 30 May , Ratko Mladić phoned Rupert Smith and agreed not to put hostage Blue Helmets in chains , but to merely " bring " them on strategic sites . He also demanded " excuses " for the death of the four Serbian soldiers killed by the French at Vrbanja bridge , threatening to " be unable to guarantee the safety " of the UN forces in Goražde . The Fall of Srebrenica . On 12 July 1995 UNPROFOR failed to deter the Bosnian Serb attack on Srebrenica because they were not able to sufficiently reinforce the Dutch battalion in place , and the city was overrun . When the dual key practices effectively prevented any serious air support from materialising all the Dutch could do was evacuate the women and children . The Serbs held the Muslim men and massacred thousands of them . The safe area of Zepa also fell to Bosnian Serbs on 25 July The events in Srebrenica led to the Peacekeeping Best Practices Unit ( PBPU ) report NATO initiated " Operation Deliberate Force " on August 30 , 1995 in response to further provocations by Serb forces . At this point , UNPROFOR had become “ militarily engaged ” with NATO against the Bosnian Serb Army . NATO and UNPROFOR were increasingly difficult to separate by fall of 1995 in terms of both policy and actions taken on the ground . In retaliation for the NATO bombings , the Serbs proceeded to retrieve their confiscated heavy weapons from the UN - controlled concentration points by force . The peace - keepers , massively out - numbered , had to surrender after brief symbolic fights . In several instances , Blue Helmets were surrounded in weapon storage areas by massively superior Serbian forces . General Hervé Gobillard , commanding officer for UN troops in Sarajevo , stated that the peacekeepers were " merely limited in their movements , yet [ had ] arms , ammunition food for many days and strict orders to defend their positions " , but in the light of the hostage - takings , concerns were raised and the UN - led bombing stopped . Also , Serbian retaliations against civilians because of the bombings caused 70 dead and 150 wounded in Tuzla , and 5 dead in Goražde . Later one winter ’ s day British UN troops carrying side arms were confronted by General Mladić skiing down the piste at Sarajevo ’ s former Olympic skiing resort but made no move for their guns ; skiing behind Mladić were four bodyguards . Despite his Hague warrant , they decided to carry on skiing . Later NATO had a rethink , sending commandos to arrest war crimes suspects , but Mladić simply went underground . No amount of NATO action or UN demands , or even a $ 5 million bounty announced by Washington , could bring him in . Operation Storm and Dayton Agreement . The above actions and the operations by Croat Forces in the Krajinas in Operation Storm in August 1995 altered the political geography of BiH . Collectively these ultimately led to the Dayton Agreement and the deployment of the NATO led IFOR on 20 December 1995 to ensure the adherence of the Former Warring Factions ( FWF ) to the Military Annexes of The General Framework Agreement for Peace in Bosnia and Herzegovina . Some of UNPROFOR troops were folded into the new IFOR forces , but for all intents and purposes , UNPROFOR no longer operated in Bosnia and Herzegovina . Perception in Participating Countries . The situation of the field was complex , due to the fact that there were three warring parties , and numerous para - military units , responsible for the most atrocious exations , and outside of the regular chain of command . Also , most of the parties would use ambiguous tactics . For instance ( and not exhaustively ) : A great deal of resentment and frustration arose in the participating countries , especially in those whose troops had been in contact with the most outrageous situations ; for instance ( and not exclusively )