Operation Deny Flight

Operation Deny Flight
Operation Deny Flight
Part of NATO intervention in Bosnia
F-15C 53FS 36FW Aviano 1993.jpeg
An F-15C is met by maintenance personnel at Aviano Air Base during Operation Deny Flight
Date April 12, 1993–December 20, 1995
Location Bosnia and Herzegovina
Result Operation changes to Operation Deliberate Force
 NATO  Republika Srpska
Commanders and leaders
United States Leighton W. Smith, Jr.
Canada Lewis Mackenzie [1]
Republika Srpska Ratko Mladić
Casualties and losses
United Kingdom 1 BAE Harrier
United States 1 F-16C
United States 1 F/A-18C Hornet crashed in Adriatic sea, killing pilot [2][3]
United States 1 Predator ACTD
United States 1 Sikorsky CH-53E Super Stallion damaged [4]
United Nations Hundreds of POWs [5]
Republika Srpska 5 J-21 Jastrebs
Republika Srpska 1 ammunition depot [6]
Republika Srpska 2 command posts [6][7]
Republika Srpska 1 airstrip damaged [6]
Republika Srpska 4 SA-6 missile sites [7][8]
Republika Srpska several armored vehicles

Operation Deny Flight was a North Atlantic Treaty Organization (NATO) operation that began on April 12, 1993 as the enforcement of a United Nations (UN) no-fly zone over Bosnia and Herzegovina. The United Nations and NATO later expanded the mission of the operation to include providing close air support for UN troops in Bosnia and carrying out coercive air strikes against targets in Bosnia. Twelve NATO members contributed forces to the operation and, by its end on December 20, 1995, NATO pilots had flown 100,420 sorties.

The operation played an important role in shaping both the Bosnian War and NATO. The operation included the first combat engagement in NATO's history, a February 28, 1994 air battle over Banja Luka, and in April 1994, NATO aircraft first bombed ground targets in an operation near Goražde. These engagements helped show that NATO had adapted to the Post-Cold War era and could operate in environments other than a major force on force engagement on the plains of Central Europe. Cooperation between the UN and NATO during the operation also helped pave the way for future joint operations. Although it helped establish UN-NATO relations, Deny Flight led to conflict between the two organizations. Most notably, significant tension arose between the two after UN peacekeepers were taken as hostages in response to NATO bombing.

The operations of Deny Flight spanned more than two years of the Bosnian War and played an important role in the course of that conflict. The no-fly zone operations of Deny Flight proved successful in preventing significant use of air power by any side in the conflict. Additionally, the air strikes flown during Deny Flight led to Operation Deliberate Force; a massive NATO bombing campaign in Bosnia that played a key role in ending the war.


Background and Operation Sky Monitor

In October 1992, at the beginning of the Bosnian War, the United Nations Security Council passed Resolution 781. This resolution prohibited unauthorized military flights in Bosnian airspace. Following the resolution, NATO began Operation Sky Monitor during which NATO forces monitored violations of the no-fly zone, without taking any military action against violators. By April 1993, NATO forces had documented more than 500 violations of the no-fly zone.[9] In response to these "blatant" violations of Bosnian air space, and implicitly of resolution 781, the UN Security Council issued Resolution 816.[10]

While Resolution 781 prohibited only military flights, Resolution 816 prohibited all flights in Bosnian air space, except for those expressly authorized by the UN Flight Coordination Center in Zagreb. The resolution also authorized UN member states to "take all necessary measures...to ensure compliance" with the no-fly zone restrictions.[10] In response to this resolution, NATO commenced Operation Deny Flight on April 12, 1993. Initially Deny Flight was intended only to enforce the no-fly zone; however several NATO members, including the United States, were eager to find ways to end the war and improve the situation of civilians, and hoped that military action could do so. The US had already taken unilateral actions to aid civilians caught in the conflict by dropping humanitarian supplies into Bosnia under Operation Provide Promise, and many US officials argued for the use of military force. These officials were eager to expand US air operations through Deny Flight, hoping that an aggressive no-fly zone and possible air strikes would end the conflict more quickly.[11]

Enforcement of no-fly zone

A USAF F-15C takes off for a sortie to enforce the no-fly zone

After its adoption, Operation Deny Flight was relatively successful in preventing fixed-wing aircraft from flying over restricted air space in Bosnia. During the monitoring phase of Operation Sky Monitor, unauthorized fixed-wing flights averaged twenty per month, but during Deny Flight, the average was three.[12] During the conflict, there were only an estimated 32 fixed-wing military aircraft in Bosnia, all of them former Yugoslav National Army planes under the control of the Bosnian Serbs. Thus, NATO primarily needed to prevent incursions into Bosnian airspace from Croatia and Serbia.[13]

The first serious violation to the no-fly zone came on February 28, 1994, when six Serb J-21 Jastreb jets bombed a Bosnian factory. US Air Force F-16s shot down four of the six Serb jets over Banja Luka, in what became known as the Banja Luka incident.[14] This engagement was the first combat engagement in Deny Flight, and its only significant air to air combat engagement. Perhaps more importantly, the Banja Luka incident was also the first combat engagement in the history of NATO.[15] The Serbs acknowledged the loss of a fifth aircraft in the incident.[16]

While Deny Flight was relatively successful in stopping flights of fixed-wing aircraft, NATO forces found it very difficult to stop helicopter flights, which presented a more complicated challenge. All sides in the conflict used extensively for non-military purposes, and some of these flights were authorized by the UN. Under the operation's rules of engagement, NATO fighters were only authorized to shoot down helicopters that committed a hostile act. Otherwise, NATO fighters issued orders to "land or exit", in other words, land the aircraft or leave the no-fly zone. Typically, helicopters in Bosnian airspace complied with these orders by landing, but then took off again after NATO forces departed.[17] None of the parties in the conflict respected the ban on helicopter flights, as evidenced when Ratko Mladić responded to a BBC journalist's question about his violation of the ban with the statement, "The commander of the Bosnian Serb armed forces does not ride on a donkey."[18]

Deceptive markings on helicopters further complicated matters for NATO pilots. Many of the combatants painted their helicopters to look like those of organizations that the UN's Zagreb Flight Coordination Center had authorized to fly in restricted space. For example, Republika Srpska often painted a Red Cross logo on their helicopters, and Croatian helicopters were given markings similar to those of UN humanitarian aid helicopters. The questionable identity of these helicopters became particularly problematic after the Black Hawk Incident in Iraq, because NATO pilots became more reluctant to engage potential belligerents without clear identification. As a result of the rules of engagement and difficulties in aircraft identification, NATO forces proved unable to stop most unauthorized helicopter flights, resulting in a documented total of 5711 unauthorized flights during the conflict.[19]

Close air support and air strikes

Even before Operation Deny Flight began, a number of US officials lobbied for a large role for NATO air power in Bosnia. In particular, as part of Bill Clinton's platform during his 1992 campaign for President of the United States he promised a "lift and strike" policy, which included the use of air strikes against the Bosnian Serbs. After the commencement of Deny Flight, US officials, including President Clinton, pushed for an expanded mission.[20] After the Bosnian Serbs rejected the Vance-Owen Plan on May 6, 1993, Clinton and other US officials intensified these calls and they discussed the possibility of using large-scale strikes to coerce the Serbs into acceptance. Ultimately, no such strikes were approved or carried out, but American officials became more open to the idea of using air power for coercion.[17]

In June, partly in response to pressure from the United States, the Security Council passed Resolution 836 which authorized NATO forces to provide close air support for UNPROFOR forces upon request. The procedure to request air support was quite difficult, as it involved the "dual key" of both UN and NATO approval. UN approval required contact with the United Nations headquarters in New York City, making effective coordination nearly impossible given the difference in time zones. The UN approval process was later somewhat streamlined when UN Secretary-General Boutros Boutros-Ghali delegated the authority to authorize air strikes to his special representative in Bosnia, Yasushi Akashi.[7] Even after this simplification, however, "dual key" remained a problem as all requests first had to be processed through the UN Air Operations Center in Kiseljak then pass up the entire UNPROFOR chain of command to Akashi. After Akashi approved the request, he would make a request to NATO commanders who then had to pass orders back down their chain of command and coordinate with forces on the ground.[21]

Due to the difficult "dual key" authorization measure, NATO did not fulfill its close air support mission for several months. Nonetheless, NATO soon began further planning for a third mission: coercive air strikes as advocated by the United States. NATO first prepared to use Deny Flight to carry out air strikes in August 1993 as part of a plan to end the Siege of Sarajevo. After diplomatic intervention, the plan was not executed, but a precedent was established for the possible use of air strikes. Thus, in February 1994, after the Sarajevo Marketplace Bombing, NATO issued an ultimatum to the Serbs to withdraw all heavy weapons from an exclusion zone around Sarajevo or face bombing. The Serbs complied with NATO demands, so no strikes were carried out.[22]

Attack on Goražde

In April 1994, the Bosnian Serbs launched an attack on the UN Safe Area of Goražde. Initially, US Secretary of Defense William Perry told reporters that the United States would "not enter the war to stop" the Serbs from overrunning Goražde, and other senior officials publicly downplayed the possibility of using air strikes.[23] Several days into the attack, however, a number of UNPROFOR soldiers were injured, and one was killed by Serb fire. Thus, General Michael Rose, the UNPROFOR Commander, requested NATO strikes under the mandate of UNSCR 836.[24]

On April 10, in response to the request, two US Air Force F-16s dropped bombs on Serb targets, including a tank and a command post. The next day, two US Marine Corps F/A-18C aircraft strafed additional targets in the area. That same day, General Ratko Mladić, the Bosnian Serb commander, called General Rose and threatened the safety of his forces, saying "one more attack and I will shoot down aircraft – cannot guarantee safety of UNPROFOR and will attack UNPROFOR and your headquarters".[25] Making good on his threat, from April 12 to April 14, Mladić ordered his forces to surround 150 UNPROFOR peacekeepers, effectively taking them hostage. Mladić then telephoned General Rose and told him "that if NATO did not stop its actions, not one UN soldier would leave alive".[26] Some of the UNPROFOR hostages were from NATO member states, notably the United Kingdom and France, who pushed for an immediate end to the strikes out of fear for the safety of their personnel. In response to the British and French concerns, NATO temporarily recalled its forces, but on April 15, in response to increased Serb attacks, aircraft were again deployed to the area.[27]

As Mladić had promised, the Serb army around Goražde attempted to shoot down NATO aircraft. On April 15, 1994, a French Dassault Étendard IV jet was hit by ground fire while conducting a reconnaissance mission in the area. The jet was damaged, but returned safely to its carrier, the Clemenceau (R 98).[7] The next day, April 16, a British Sea Harrier from the carrier HMS Ark Royal[28] was called in by UN forces to strike a tank. After making several unsuccessful passes at the target, the Sea Harrier was targeted by a Serb surface-to-air missile and shot down. The pilot ejected safely and was rescued, but his plane was destroyed.[29] After the Harrier shootdown, NATO did not carry out any further strikes around Goražde, and on April 17, Mladić released most of the hostages he had taken. Over the next several days, the Serbs agreed to, and then broke, several ceasefires in the Goražde area. In an effort to secure Goražde and force the Serbs to honor agreements, NATO and the UN issued an ultimatum for the Serbs to cease their attacks and withdraw their forces or face additional air strikes on April 22. The Serbs complied with the ultimatum, requiring a withdrawal of heavy weapons from a 20 kilometers (12 mi) zone and all forces from a 3 km (1.9 mi) zone. Because of the Serb compliance, NATO ceased its operations around Goražde.[7]


In February 1994 (when air strikes were originally threatened), NATO had created a heavy weapons exclusion zone around Sarajevo, and collected weapons at a number of sites. On August 5, the Bosnian Serb Army seized several weapons from the Illidža Weapons Collection site in clear violation of the exclusion zone agreement. During the seizure, the Serb forces injured a Ukrainian UNPROFOR peacekeeper. In response to the attack, the UN once again requested NATO air support. Two US A-10 aircraft repeatedly strafed Serb targets, and the Serbs returned the seized weapons to the collection site.[30]

On September 22, UNPROFOR again requested NATO air support in the Sarajevo area after Serb forces attacked a French armored personnel carrier. In response, two British SEPECAT Jaguar aircraft struck and destroyed a Serb tank.[7]

Attack on Bihać, bombing of Udbina and hostages

Bihać is located in Bosnia
The location of Bihać within Bosnia

In October and November 1994, during the Siege of Bihać, the Muslim-Croat Federation launched a large offensive around the town of Bihać, in far northwestern Bosnia. The Serbs soon launched a counterattack, and in support of their operations, launched air strikes with aircraft based at a former JNA military airport in Udbina, south of Bihać, located in Croatian territory that was at the time controlled by the Republic of Serbian Krajina. The Serb aircraft dropped napalm and cluster bombs. Although most of the ordnance came from old, unreliable stocks and failed to explode, the attacks were a clear violation of the no-fly zone, and a challenge to NATO.[31] NATO immediately looked for ways to respond, but its forces were not permitted to carry out operations in Croatian airspace, and due to Bihać's proximity to the border, Serb aircraft could attack into Bosnia, then cross back into Croatia before being intercepted. As such, NATO was powerless to stop the incursions.[32]

In recognition of the situation, the Security Council passed Resolution 958, which allowed NATO aircraft to operate in Croatia. On November 21, NATO acted under its new authority with a strike on the Udbina airfield. The strike, which involved 39 aircraft, was the largest combat operation in NATO's history up to that time; nonetheless, it was criticized as a "pinprick" that did little real damage to Serb capabilities, only temporarily disabling runways.[33] The NATO forces deliberately refrained from attacking Serb planes at the airfield, and only targeted runways and anti-air capabilities.[34] Following the Udbina strike, NATO continued to launch strikes in the area, and on November 23, after a NATO reconnaissance plane was illuminated by the radar of a surface-to-air missile (SAM) system, NATO planes attacked SAM sites at Otoka and Dvor with AGM-88 HARM anti-radiation missiles.[33] The Serbs reacted to these strikes by immediately seizing 250 UNPROFOR hostages, and a total of 500 by early December. While the hostages were treated fairly well, some were used as human shields, including three who were forced to lie on the tarmac at the Serbs' Banja Luka airbase.[35]

After the strikes at Otoka and Dvor, the Bosnian Serbs continued to target NATO aircraft with surface to air missiles, while advancing against the Bihać enclave. On November 24, Serb forces fired radar-guided missiles at two British Tornado F3 aircraft. The next day, the Serbs fired on two NATO F-16s.[36] In response to this growing SAM threat, and the UNPROFOR hostages, NATO suspended flights in Bosnian airspace on December 2.[35]

Shortly after the suspension of NATO flights, former US President Jimmy Carter personally negotiated a four-month ceasefire in Bosnia. Although there were some violations of this ceasefire, most of the parties in the conflict heeded it. NATO ordered its planes back in the air, but due to the diminished hostilities, they did not engage in any significant operations for the next several months.[37] The reduced tensions resulting from the Carter ceasefire and the cessation of NATO air operations also led to the release of most of the UNPROFOR hostages over the next several weeks.[38][39][40]

Expansion of the air campaign in 1995

An EF-111 flying over the Alps in support of Deny Flight in May 1995

Although 1994 ended peacefully with the Carter ceasefire, NATO continued planning for new operations. Both NATO and UN officials believed that after the ceasefire expired in March, the fighting would resume. As such, planners at the Balkans Combined Air Operations Center (CAOC) began drawing up plans for new air operations. By late December, the planners developed a plan called "Dead Eye", designed to eliminate Serb SAM capabilities, so that NATO could regain uncontested air superiority. Over the next several months, the planning for "Dead Eye" gradually evolved into the plan for Operation Deliberate Force, a massive bombing of Serb targets that was eventually executed in August and September 1995.[41]

Bombing of Pale and the hostage crisis

While NATO was planning its new strategy, the cease-fire expired, and, as predicted, fighting resumed. As the fighting gradually widened, Bosnian forces launched a large-scale offensive in the area of Sarajevo. In response to the attack, the Bosnian Serbs seized heavy weapons from a UN-guarded depot, and began shelling targets.[42] As a retaliation for these actions, the UN commander, Lt. General Rupert Smith requested NATO air strikes. NATO honored the request on May 25 and May 26, 1995 by bombing a Serb ammunition dump at Pale.[7] The mission was carried out by USAF F-16s and Spanish Air Force EF-18As Hornet armed with laser-guided bombs.[43] The Serbs then seized 377 UNPROFOR hostages and used them as human shields for a variety of targets in Bosnia, forcing NATO to end its strikes.[44]

Facing a second hostage crisis, General Smith and other top UN commanders began shifting strategies. The UN began to redeploy its forces to more defensible locations, so that they would be harder to attack or take hostage. More importantly, Gen. Rose established the UN Rapid Reaction Force, a heavily-armed unit with more aggressive rules of engagement, designed to take offensive action if necessary to prevent hostage-taking and enforce peace agreements.[45]

Downing of Scott O'Grady

Captains T.O. Hantford, Scott O'Grady, and Bob Wright at a press conference after O'Grady's rescue

After the seizure of the 377 hostages, NATO did not carry out further air strikes, but it did continue regular air patrol operations in support of the no-fly zone. On June 2, 1995, Captain Scott O'Grady of the United States Air Force was sent on a routine no-fly zone patrol in his F-16. While on patrol, O'Grady's F-16 was shot down by a Serb SA-6 surface-to-air missile system near Mrkonjić Grad. O'Grady ejected safely, but was trapped in Serb territory. According to many US officials, he may have been deliberately targeted so that the Serbs could take an American hostage.[46]

After O'Grady was shot down, tensions increased greatly between NATO and the Bosnian Serbs. A number of US commanders called for immediate retaliatory air strikes; however, the Serbs still held the majority of the hostages seized after the bombing of Pale. The threat to the hostages prevented NATO from acting more forcefully, and the Serbs released 121 hostages immediately after the incident in an effort to cool tensions. Nonetheless, the situation remained explosive for the next six days until O'Grady was rescued on June 8 by the 3rd Battalion 8th Marines, ending the calls for immediate offensive action. Shortly thereafter, the Serbs released the remaining hostages.[47] As a result of the incident, NATO ordered that all further sorties be accompanied by aircraft designed for suppression of enemy air defenses (SEAD).[48] The 2001 film Behind Enemy Lines is loosely based on this event.[49]

On August 14, a USAF MQ-1 Predator UAV was shot down by Serb antiarcraft fire in the same area.[50][51]

Response to Srebrenica

A month after the O'Grady incident, on July 6, the Bosnian Serb Army began attacking the UN safe area of Srebrenica. Dutch peacekeepers in the area considered calling for NATO air strikes in response to the attack, but decided against them because the Serbs were not using heavy weapons, and out of fear of another hostage crisis.[52] On July 10, as the fighting intensified, the Dutch troops finally requested close air support from NATO, but due to communication problems in the "dual key" system, the request was not authorized until the next day.[53]

On July 11, NATO prepared for a large-scale mission in Srebrenica involving 60 aircraft. At 2:30 PM, the first wave of the assault, two Dutch F-16s, bombed two Serb tanks on the outskirts of town. Two USAF F-16s were dispatched next (to attack an artillery piece), but failed to find their target. Soon thereafter, the Serbs seized several Dutch peacekeepers as hostages and threatened to kill them if NATO did not call off its attacks. The Dutch commander reported this back to his government, and Dutch Defense Minister Joris Voorhoeve immediately telephoned the NATO operations center and ordered an end to the attacks.[54]

By the end of the day, Srebrenica had fallen to the Serb Army, who began a brutal campaign of ethnic cleansing that left roughly 7000 dead. In the wake of this tragedy, many observers blamed NATO for failing to use its airpower more forcefully. David Rohde, a journalist, later wrote that "if NATO close air support had been used earlier ... the 7,079 missing might still be alive today".[55] This feeling that NATO could have prevented thousands of deaths by acting more strongly led to increased planning for Operation Deliberate Force.[56]

The London Conference

After the events at Srebrenica, sixteen nations met at the London Conference, which began on July 21, 1995, to consider new options for Bosnia. As a result of the conference, UN Secretary-General Boutros Boutros-Ghali gave General Bernard Janvier, the UN military commander, the authority to request NATO airstrikes without consulting civilian UN officials.[57] The North Atlantic Council, NATO's top political body, and the UN also agreed to use NATO air strikes in response to attacks on any of the other safe areas in Bosnia. The participants at the conference also agreed in principle to the use of large-scale NATO air strikes in response to future acts of Serb aggression.[58]

Operation Deliberate Force

A US Air Force F-16C Fighting Falcon lands during Operation Deliberate Force

On August 28, 1995, Serb forces launched a mortar shell at the Sarajevo marketplace killing 37 people. Admiral Leighton Smith, the NATO commander, recommended that NATO launch retaliatory air strikes against the Serbs under the plan established for Operation Deliberate Force.[59] On August 30, 1995, NATO officially launched Operation Deliberate Force with large-scale bombing of Serb targets. This bombing superseded Operation Deny Flight's role for air strikes and close air support, but Deny Flight remained an active operation, still enforcing the no-fly zone over Bosnia.[60]

Until September 20, 1995, when Operation Deliberate Force ended, the role played by Deny Flight was minimal. After the suspension of Operation Deliberate Force; however, several further operations were carried out under Deny Flight. On October 4, 1995, Deny Flight aircraft fired HARM missiles after being targeted by surface to air missiles. On October 8, 1995, the UN requested close air support near Tuzla. Due to bad weather conditions, NATO aircraft were unable to locate their targets, but on October 9, in the final combat engagement of Deny Flight, NATO aircraft returned and destroyed a Serb command and control bunker.[7]

Termination of Deny Flight

Adm. Leighton Smith speaks at the ceremony transferring authority to IFOR.

After the adoption of the Dayton Accords, a peace agreement for Bosnia, Deny Flight's mission was no longer necessary. On December 15, 1995, the United Nations Security Council officially terminated the resolutions that had authorized the operation, and on December 16, the North Atlantic Council agreed to terminate Operation Deny Flight, effective December 20. On December 21, 1995, NATO held a formal closure ceremony for Deny Flight in Vicenza. Many of the forces assigned to Deny Flight were transferred to Operation Decisive Endeavor, to provide support for new IFOR peacekeepers in Bosnia.[7]

Structure of forces

Throughout the course of its operation, Deny Flight was directed by Allied Forces Southern Europe (AFSOUTH) in Naples, under the command of the Commander-in-Chief of Allied Forces Southern Europe.[7] At the beginning of the operation, Admiral Jeremy Boorda served as the commanding officer; he was replaced by Admiral Leighton Smith in 1994.[12] Smith and Boorda, however, delegated day to day authority to Allied Air Forces Southern Europe (AIRSOUTH) commanded by Lieutenant General Joseph W. Ashy (until 1994) and then Lt Gen Michael Ryan.[61] While AIRSOUTH maintained day to day command, "mission tasking and operational control" were delegated to the commander of the NATO 5th Allied Tactical Air Force (5ATAF), initially Lt Gen Antonio Rosetti[62] and later Lt Gen Andrea Fornaserio, both of the Italian Air Force.[61]

To simplify the chain of command and coordinate activities, NATO established the Combined Air Operations Center (CAOC) in Vicenza, Italy, which assumed practical day-to-day control of Deny Flight and reported to the commander of the 5ATAF. Each squadron participating in the operation sent a liaison officer to the CAOC to ensure coordination.[12] The initial director of the CAOC was Lt Gen James Chambers of the US Air Force.[62] In November 1994, Major General Hal Hornburg replaced him.[63] In practice, most tactical level decisions about Deny Flight were made by the director of the CAOC, and he had the authority to order NATO pilots to engage violators of the no-fly zone.[62]

Twelve NATO countries provided forces to Operation Deny Flight: Belgium, Canada, Denmark, France, Germany, Italy, the Netherlands, Norway, Spain, Turkey, the United Kingdom and the United States. Together, these twelve states contributed a total of 4,500 personnel who were based at air bases in five countries: France, Germany, Greece, Italy, and the United Kingdom and on aircraft carriers in the region.[7] Eight of the participating countries contributed a total of 239 aircraft to the operation, of which nearly half, 108, came from the United States.[7] Within the United States, the US Navy and US Marine Corps provided the most support for the operation, and together they flew 70% of all of the air defense sorties flown during Deny Flight.[12] American aircraft also provided the majority of the airstrikes during the conflict; of the 1,150 bombs dropped by NATO forces, 88% came from American aircraft.[12]

Impact and legacy

Operation Deny Flight lasted for 983 days and included 100,420 sorties[64] carried out by 4,500 personnel from 12 NATO countries.[7] It included the first combat engagement in NATO history, the Banja Luka incident, and many of NATO's first out of area operations. As such, Deny Flight "represented a momentous act, if only in symbolic terms, in that the alliance assumed a combat mission in a nondefensive capacity and out-of-area".[65] Beyond this symbolic effect, Deny Flight had important consequences for NATO military policy, international relations, and the war in Bosnia.

Effect on military policy

A US Marine Corps F/A-18 prepares for a mission in Bosnia in December 1995

As one of the first major combat tests of NATO airforces, Deny Flight provided several important military lessons. Most importantly, Deny Flight helped to prove the effectiveness, or drive the development of several technologies. For example, during the operation, the F/A-18D Hornet was proven to be a "highly resourceful multirole platform" for the United States Marine Corps.[66] Deny Flight was also important in the move towards precision-guided munitions, as nearly 70% of the munitions dropped by NATO during the conflict were precision-guided,[12] versus only 8% during the Gulf War.[67] For the Royal Navy, Deny Flight led to a re-evaluation of the Sea Harrier and a number of upgrades to it. In particular, the Royal Navy added the Paveway II laser-guided bomb to the Harrier, giving it a precision capability, and upgraded electronics aboard the aircraft in response to the necessities of combat in Bosnia.[68] The lessons of Bosnia also led the Royal Air Force to deploy the Harrier GR7 aboard Royal Navy carriers for future operations in order to deliver more offensive force projection capability.[69]

The four NATO aircraft shot down during Operation Deny Flight also forced NATO members to consider new defensive measures for their aircraft, including increased stealth capabilities.[12] Deny Flight also demonstrated the necessity of better communications and integration among forces operating together, and led to some calls for technical training of UN personnel to work with NATO military systems.[12] Finally, the rules of engagement established under Deny Flight also played an important role in shaping the rules of engagement for later NATO operations other than war, including Operation Joint Endeavor, and even NATO operations in Afghanistan.[70]

Effect on the Atlantic relationship

Operation Deny Flight, and other NATO operations during the Bosnian War, resulted in significant tension within NATO and the Atlantic relationship. Deny Flight and other early operations "forced the Allies to consider the question of NATO's military responsibility for territory outside of its traditional defense perimeter, and it was one over which they were deeply divided".[71] Disagreements between the United States and its European allies over when and how to use air power "made intra-alliance diplomacy more problematic" during the period.[72] Many of these problems in the relationship were the result of concerns from European nations who had forces on the ground in UNPROFOR that might be taken hostage. The fact that the United States pushed for air strikes without placing its own forces on the ground in Bosnia greatly exacerbated this problem.[73][74]

Deny Flight also helped set the path for future UN-NATO relations. Throughout the operation, NATO "felt the frustration of having its wings clipped by a parallel UN authority",[75] while United Nations officials worried about the effect that NATO air strikes would have on the perceived neutrality of the United Nations.[76] Frustration with the "dual key" procedure of authorization for NATO action also led NATO officers to reject such an arrangement in the future. Admiral Leighton Smith, the commander of NATO's forces during Deny Flight, expressed this sentiment quite bluntly, saying "Don't ever have another dual key."[77] These difficulties in negotiating the UN-NATO relationship during Deny Flight were a major factor in the decision to place later NATO forces in the Balkans under the sole control of the NATO chain of command.[78][79] While many of these effects on UN-NATO relations were negative, Deny Flight also had positive implications. During the operation, NATO and the UN exchanged liaison officers for the first time in their respective histories, establishing a precedent for military cooperation between the two.[80] The communication and coordination failures during Deny Flight also instilled "a desire for mutual understanding and common solutions" between the two organizations.[81] This desire for cooperation was crucial to the establishment of IFOR, and later UN-NATO cooperation in Bosnia and elsewhere.[81]

Effect on the Bosnian War

Deny Flight also played a significant role in shaping the war in Bosnia, although its exact impact is debated. While Richard Holbrooke, the American special envoy for Bosnia, recognized Operation Deliberate Force as "a historic development in post-Cold War relations" and as a crucial element in ending the war in Bosnia,[82] the actual impact of Deny Flight on the course of the conflict was more muted. None of the air strikes in Deny Flight were on the scale of those in Deliberate Force, and they did not significantly change the balance of power. Notably, however, Deny Flight was successful in that it "neutralised the Bosnian Serbs' advantage in fixed-wing air-power".[83] Deny Flight also paved the way for Operation Deliberate Force. According to Robert E. Hunter, then the US Ambassador to NATO, Deny Flight was crucial to the process of building "consensus support for increasingly robust use of airpower over Bosnia", which eventually culminated in Operation Deliberate Force.[84]

While the material impact of Deny Flight was minimal, it did have a significant political impact. From the very beginning, according to Michael Beale, "the operation's implied objective was to demonstrate UN and NATO determination to stabilize the situation in Bosnia so that a peaceful settlement could be achieved".[85] Given the many violations of Deny Flight by helicopters, and the frequent failure of coordination between NATO and the UN, it is uncertain whether Deny Flight accomplished this mission. Nonetheless, NATO's limited air strikes under Deny Flight "demonstrated its determination to protect United Nations personnel" and Bosnian civilians, according to Michael R. Gordon, chief military correspondent for The New York Times. This determination eventually held the key to peace.[24]

See also

  • Strategic Bombardment in the Kosovo War


  1. ^ http://sanseverything.wordpress.com/2008/09/22/lewis-mackenzie-the-sorrow-and-the-disgrace/
  2. ^ F-18 Hornet ejection history
  3. ^ U.S. Jet Crashes in Adriatic, Pilot Dies
  4. ^ http://www.afsouth.nato.int/archives/operations/DenyFlight/DenyFlightFactSheet.htm
  5. ^ West flexes muscle, Karadzic warns against action
  6. ^ a b c Ripley, Tim (2001). Conflict in the Balkans, 1991-2000. Osprey Publishing, pp. 21-24.ISBN 1841762903
  7. ^ a b c d e f g h i j k l m AFSOUTH Fact Sheet
  8. ^ Air pictorial: journal of the Air League, Volume 57. Air League of the British Empire, 1995
  9. ^ Beale, pp. 19–20
  10. ^ a b "Resolution 816"
  11. ^ Beale, p. 19
  12. ^ a b c d e f g h Simmons
  13. ^ Beale, pp. 21
  14. ^ Beale, pp. 2–3
  15. ^ Owen, p. 21
  16. ^ Serbian officially admitted 5 Aircraft lost (Serbian)
  17. ^ a b Beale, p. 20
  18. ^ "Ratko Mladic's very personal war"
  19. ^ Beale, pp. 19–21
  20. ^ Safire
  21. ^ Starr (1993)
  22. ^ Beale, p. 22
  23. ^ Gordon (April 5, 1994)
  24. ^ a b Gordon (April 11, 1994)
  25. ^ Burg, p. 147
  26. ^ Beale, p. 25
  27. ^ Bucknam, p. 137
  28. ^ Operation Deny Flight AFSOUTH Fact sheets
  29. ^ Bucknam, p. 138
  30. ^ Bucknam, p. 163
  31. ^ Beale, p. 28
  32. ^ Sudetic
  33. ^ a b Bucknam, pp. 182–83
  34. ^ "NATO, Expanding Bosnia Role, Strikes a Serbian Base in Croatia"
  35. ^ a b Beale, p. 29
  36. ^ Bucknam, pp. 183–84
  37. ^ Beale, p. 32
  38. ^ "Serbs Release 55 Canadians But Renew Attack on Enclave"
  39. ^ "Bosnian Serb leader parlays with Carter, promises peace moves"
  40. ^ "Carter Undertakes Bosnia Peace Initiative"
  41. ^ Bucknam, pp. 204–205
  42. ^ Beale, p. 33
  43. ^ Ripley, p. 23
  44. ^ Bucknam, p. 215
  45. ^ Bucknam, p. 216
  46. ^ Bucknam, p. 218
  47. ^ Bucknam, p. 220
  48. ^ "Deny Flight shootdown may put USAF on the offensive"
  49. ^ Behind Enemy Lines (2001) - Trivia
  50. ^ Major Robert C. Nolan II: The Pilotless Air Force?. The Research DepartmentAir Command and Staff College, March 1997, page 6
  51. ^ University of Texas at Arlington
  52. ^ Bucknam, pp. 246–247
  53. ^ Bucknam, p. 248
  54. ^ Bucknam, p. 249
  55. ^ Rohde, p. 354.
  56. ^ Bucknam, pp. 250–252
  57. ^ Beale, p. 34
  58. ^ Bucknam, p. 253
  59. ^ Davis
  60. ^ Beale, p. 36
  61. ^ a b Davis, p. 48
  62. ^ a b c Bucnman, p. 63
  63. ^ Bucknam, p. 198
  64. ^ "SFOR/KFOR Air Component"
  65. ^ Papacosma
  66. ^ Slick
  67. ^ Boot, p. 347
  68. ^ "Flexing Joint Muscle: Mixed air groups aboard carriers"
  69. ^ "RAF Harriers could add teeth to RN carriers"
  70. ^ Spence
  71. ^ Moore, pp. 28–29
  72. ^ Foster, p. 15
  73. ^ Foster, p. 16
  74. ^ Burg, pp. 149–150
  75. ^ Foster, p. 17
  76. ^ Allin, p. 25
  77. ^ Starr (1995)
  78. ^ Allin, p. 26
  79. ^ Wallander, p. 719
  80. ^ Leurdijk
  81. ^ a b Schulte, p. 28
  82. ^ Holbrooke, p. 102
  83. ^ Schulte, p. 21
  84. ^ Owen
  85. ^ Beale, p. 20.



  • Beale, Michael (1997). Bombs over Bosnia: The Role of Airpower in Bosnia-Herzegovina. Maxwell Air Force Base, Montgomery: Air University Press. OCLC 39892597. 
  • Boot, Max (2006). War Made New. New York: Gotham Books. ISBN 1-592-40222-4. OCLC 69104262. 
  • Bucknam, Mark (2003). Responsibility of Command. Maxwell Air Force Base: Air University Press. ISBN 1-58566-115-5. OCLC 52199670. 
  • Burg, Steven; Shoup, Paul (1999). The War in Bosnia-Herzegovina. Armonk: M.E. Sharper. ISBN 1-56324-308-3. OCLC 44955248. 
  • Davis, Bradley (2000). "The Planning Background". Deliberate Force. Maxwell Air Force Base: Air University Press. ISBN 1-58566-076-0. OCLC 43095788. 
  • Foster, Edward (1995). NATO's Military in the Age of Crisis Management. London: Royal United Services Institute for Defence Studies. ISBN 0-85516-099-3. OCLC 32775929. 
  • Holbrooke, Richard (1999). To End a War. New York: Modern Library. ISBN 0-37575-360-5. OCLC 40545454. 
  • Moore, Rebecca (2007). NATO's New Mission. Westport: Praeger Security International. ISBN 0-275-99296-9. OCLC 74966600. 
  • Ripley, Tim (2001). Conflict in the Balkans, 1991-2000. London: Osprey Publishing. ISBN 1841762903. 
  • Rohde, David (1997). A Safe Area, Srebrenica: Europe's Worst Massacre Since the Second World War. London: Pocket Books. ISBN 0-67100-499-9. OCLC 37329422. 


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