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British Special Forces in the Falklands War: Facts, Myths and Strategy

During the Falklands War, Argentina's mere five air-launched AM-39 Exocet missiles posed a disproportionately large threat to a task force 8,000 miles away from Britain, thereby influencing the course of the war.

When we hear the words “Falklands War”, a clear picture immediately comes to mind: the British Navy, sent by a resolute Margaret Thatcher, and a dazzling victory over Argentina's unexpected invasion. The pages of history are filled with the glorious moments of this victory. Naval and air battles, bloody land clashes like Goose Green and Tumbledown. However, the situation was more complex than it initially appeared.

Cover image: British Type 42 guided missile destroyer HMS Sheffield (hit by an AM-39 Exocet anti-ship missile fired from an Argentine Navy Dassault-Breguet Super Étendard attack aircraft on 4 May 1982). The missile strike opened a 15-by-4-foot gash in the ship's starboard side at the second deck level, between the galley, the forward auxiliary machinery room, and the forward machinery room. The Exocet missile strike on HMS Sheffield resulted in the loss of 20 sailors. The ship sank six days later while being towed away, as the resulting fires could not be brought under control. HMS Sheffield went down in history as the first ship in the British Navy to be sunk by enemy fire since the Second World War.

During the most critical stages of the Falklands War, Argentina's French-made Super Étendard fighter-bomber aircraft and the AM-39 Exocet anti-ship missiles launched from these aircraft emerged as the greatest and most urgent strategic threat to the British Task Force. This weapon system emerged as an asymmetric element with the potential to single-handedly alter the course of the war and became central to British military planning. The danger posed by the Exocet profoundly affected the strategic fabric of the war, not only by striking ships but also by limiting the tactical mobility of the British navy and forcing the command echelon to consider extremely risky countermeasures.

Five AM-39 Exocet anti-ship missiles arrived in Argentina in November 1981 (on board the ARA Cabo de Hornos) with the first five Super Étendard fighter aircraft. The Argentine Navy's possession of the AM-39 Exocet missile system created a serious military imbalance for the British task force during the Falklands campaign. This imbalance was fundamentally due to the British fleet's lack of Airborne Early Warning (AEW) capability. The absence of AEW support left British ships twice as vulnerable. Super Étendard aircraft could approach at low altitude below the horizon, giving Argentine pilots the tactical advantage of entering the attack range without being detected by British radars and then quickly retreating. The launched Exocet missiles flew just 1-2 metres above the sea surface thanks to ‘Sea-Skimming’ technology. This feature kept the missile below the horizon of the ship's radar, creating a ‘blind spot’.

This technical and tactical gap meant that the target usually detected the missile only in the final seconds before impact. The inability of the ship's defence systems to find an effective countermeasure against this missile posed a vital strategic threat to the British navy. It has been stated that the crew of HMS Sheffield had only 10 seconds to react. HMS Sheffield was severely damaged by an AM-39 Exocet missile fired from an Argentine Super Étendard aircraft on 4 May 1982 and sank while being towed on 10 May 1982.

Consequently, Argentina's mere five air-launched AM-39 Exocet missiles became a disproportionately large threat to a task force 8,000 miles from Britain, affecting the course of the war.

The photograph above, taken in 2006, shows a Dassault-Breguet Super Étendard aircraft loaded with an AM-39 Exocet anti-ship missile. The building in the background refers to the British Navy's ship losses during the 1982 Falklands War. The Dassault-Breguet Super Étendard aircraft in the Argentine Navy were decommissioned in 2023.

Argentina had initially ordered a total of 15 AM-39 Exocet missiles, but the export of the remaining 10 missiles was blocked due to an embargo by the French Government. This was clear and unequivocal support from French President François Mitterrand to British Prime Minister Margaret Thatcher. Shortly after the war began, Mitterrand decided to impose an embargo on the shipment of 10 additional Exocet missiles to Argentina, which had already been paid for. This decision fundamentally affected the course of the war by preventing Argentina from replenishing its limited missile stockpile. The French government also sent information obtained from Aérospatiale and even a Super Étendard and a Mirage aircraft for testing purposes to the UK to help the British understand the missile's technical characteristics.

In this section, we will see how, faced with the threat posed by the AM-39 Exocet missiles, the British command was prepared to take incredibly risky decisions in order to avoid losing the Falklands War.

Strategic Necessity and High Risk

The Falklands War forced the British command to embark on an extremely delicate and risky path in the midst of a conventional conflict: special forces operations against the Argentine mainland. These audacious plans were based on a simple but brutal military reality. The threat posed by Exocet missiles, which could only be eliminated by destroying them at their source, created a strategic necessity. However, this necessity also brought with it an uncertain gamble that could lead to potential military disaster and unforeseeable diplomatic consequences. This article examines the logic behind these high-risk ventures, their systematic planning deficiencies, and ultimately what they meant for British war efforts by looking at three key special forces operations planned for mainland Argentina – Plum Duff, Mikado and Kettledrum – from a tactical and strategic perspective.

The Exocet Threat and Strategic Dilemma

The French-made Exocet missiles carried by the Argentine Navy's Super Étendard fighter-bombers were not merely a threat to the British Task Force sailing in the South Atlantic, but an existential danger. The sinking of HMS Sheffield on 4 May 1982 after being struck by an Exocet missile painfully demonstrated how concrete and deadly this threat was. This incident sent shockwaves through the British command structure. The two aircraft carriers forming the backbone of the Task Force, HMS Hermes and HMS Invincible, were extremely vulnerable to a similar attack. The loss of even one of these ships could have meant the failure of the entire operation.

This situation presented British strategists with a critical dilemma. The survival of the Task Force depended on the destruction of Argentina's limited number of Exocet missiles and the Super Étendard aircraft that carried them. Striking their main bases in Rio Grande seemed the most effective solution. However, this would have meant a direct attack on the Argentine mainland and carried the risk of dangerously escalating the war, triggering a diplomatic crisis internationally, and increasing support for Argentina from other Latin American countries. Therefore, the statement in the assessment sent by Task Force Commander Admiral Woodward to headquarters at Northwood immediately after the sinking of the Sheffield, that ‘an attack on Rio Grande would be essential to the recovery of the Falkland Islands,’ was not only a tactical suggestion but also an acceptance of a major strategic risk.

The Role and Expectations of Special Forces

The search for a solution to the Exocet threat naturally turned to the Special Air Service (SAS), Britain's most elite military unit. The successful operation that ended the siege of the Iranian Embassy in London in 1980, broadcast live on international television channels, had elevated the SAS to an almost invincible position in the eyes of the public and political leaders.

This perception that they could ‘do anything’ led military planners to view even the most complex and risky missions as within the capabilities of the SAS. However, this perception overshadowed the risks and uncertainties inherent in special forces operations. As post-conflict analyses have detailed, only 47% of all special forces operations are considered successful.

This statistical reality stood in stark contrast to the ‘invincible’ image held by the public. The SAS's exaggerated reputation paved the way for the planning of daring but unrealistic operations, such as Israel's Entebbe raid, which were of the ‘coup de main’ (sudden and bold strike) style. The war cabinet and senior commanders, approaching the capabilities of the SAS hierarchy with almost blind faith, came close to approving missions that could potentially end in disaster.

The urgent and demanding strategic pressure created by the Exocet threat pushed the SAS to undertake a nearly impossible mission on the Argentine mainland. The first link in this chain was Operation Plum Duff, designed as a precursor to a larger attack and planned for intelligence gathering.

1) Operation Plum Duff: Intelligence Failures and Field Realities

Operation Plum Duff was not merely a simple reconnaissance mission; it was also designed as the cornerstone of Operation Mikado, the most daring and potentially disastrous plan of the Falklands War. This section examines Plum Duff as a case study illustrating how critical intelligence is in operational planning and how even the best-laid plans can unravel when confronted with field realities. However simple the mission appeared on paper, inadequate intelligence, primitive maps, and the harsh weather conditions of Patagonia combined to turn it into a struggle for survival for the team carrying it out. Patagonia is the region in the south of Chile and Argentina. It lies between the Rio Colorado in Argentina and the Bio Bio rivers in Chile to the south, and the Strait of Magellan to the north.

The Mission and Planning Process

Operation Plum Duff had a two-stage objective: the primary goal was for an eight-man SAS team from B Squadron, 6th Battalion to conduct a covert reconnaissance around the Rio Grande airbase in Argentina's Tierra del Fuego region. The secondary objective was to launch an attack on Super Étendard aircraft and Exocet missiles if an opportunity arose. However, the planning process for this ambitious mission was riddled with alarming deficiencies, lacking basic military requirements:

Intelligence: Captain Andy L. and his team, who were to carry out the mission, were provided with almost no tactical intelligence about the target area. There was no concrete information about the location, number, defensive positions, or air defence capabilities of enemy forces. The team was being sent into the unknown, in the truest sense of the word.

Maps: The materials provided to the team by the planners were more like historical artefacts than operational maps. One was a page torn from a school atlas from the 1930s, completely lacking in operational scale and detail. The other was a topographical map based on measurements taken in 1931 and last updated in 1942. The decision to launch a mission with such inadequate resources was a direct result of the command's overconfidence in the SAS's ‘invincibility myth’ that they could overcome any obstacle.

Method of Transfer: During the planning phase, no clear information was provided on how the infiltration would be carried out. A number of uncertain options were on the table, such as a submarine, a motorboat or a helicopter. This uncertainty prevented the team from making specific preparations for the mission.

Logistics and Transport

The transport of the SAS team from the UK to the Falkland Islands was a complex and multi-stage logistical operation. The team first flew to Ascension Island on a VC10 aircraft. They then parachuted into the South Atlantic from a Hercules XV200 aircraft and were rescued by the RFA Fort Austin and transferred to the HMS Hermes aircraft carrier.

A Westland WS-61 Sea King helicopter, code-named “Victor Charlie” (ZA290), one of the Task Force's most valuable and limited assets, was assigned to the mainland infiltration mission. This decision further increased the pressure on the Task Force's already overstretched air assets. The fact that the helicopter would be sacrificed on a one-way mission also demonstrated the high priority of the operation and the desperation of the command echelon.

Execution: Collision with Patagonian Reality

In the early hours of 18 May 1982, the Sea King helicopter carrying the SAS team took off from HMS Invincible and headed for Tierra del Fuego. The mission encountered a series of deadly obstacles from the outset:

Bad Weather Conditions: The helicopter soon entered a front of dense fog and freezing rain.

Visibility dropped to almost zero, making low-altitude flying extremely dangerous.Enemy Detection: As it approached the Argentine coast, the helicopter was detected on radar by the ARA Hipólito Bouchard destroyer patrolling the area.

More importantly, the destroyer contacted the Rio Grande base, which confirmed that there were no friendly aircraft in the area, putting the entire regional command on alert before the helicopter attempted to land.

Forced Landing: Unable to reach its planned landing point, the helicopter made a forced landing near Estancia la Sara, kilometres away from its intended target, when its fuel reached a critical level and weather conditions prevented further progress.

Critical Decision: Looking out of the helicopter door, Captain Andy L. saw indistinct lights and movements in the fog. He believed the area was held by enemy forces who could hear the helicopter and pinpoint its position. He decided that landing his team in an area with a high probability of ambush would be suicidal. He ordered the pilot not to drop the team and to implement the contingency plan by heading for Chile.

Outcome and Assessment

Operation Plum Duff ended in complete failure, not achieving its objective. The helicopter managed to escape to Chile, but the crew were captured and the Westland WS-61 Sea King helicopter was destroyed by the crew. The night vision goggles used in the infiltration attempt were broken and thrown into the sea. The SAS team was then secretly extracted from Chile after a long and arduous process. The reasons for the failure lie in fundamental weaknesses in the planning stage.

Reasons for Failure

Analysis

Lack of Intelligence

The team was sent blindly, with no information about the enemy's position, strength, or state of readiness. This forced the commander in the field to assume the worst-case scenario in the face of uncertainty and made the decision to cancel the mission the only responsible military option.

Inadequate Maps

It was impossible to conduct a precision infiltration operation using 40-50-year-old maps. This not only made navigation difficult but also demonstrated that the command level failed to grasp the seriousness of the operation.

Extreme Weather Conditions

Patagonia's unpredictable and harsh weather conditions were not sufficiently considered in operational planning. Thick fog made both navigation and stealth impossible for the helicopter.

Unrealistic Planning

The fact that the mission relied on a one-way helicopter flight and that the team was equipped with only four days' worth of supplies indicates that the planners either underestimated the risks involved in the mission or did not expect the team to survive.

After the operation, the SAS command attempted to make Captain Andy L. the scapegoat by blaming him for the failure. According to Captain L.'s later account, an environment was created in which he was told that ‘going out and failing, getting mowed down in a hail of bullets, would be better than coming back alive.’ However, given the conditions on the ground and the inadequacy of available resources, it is clear that his decision was the only logical and correct military decision that saved the team's lives.

Plum Duff's failure deprived Operation Mikado of its most critical element: up-to-date and reliable field intelligence. This called into question the feasibility of the main assault plan, which will be examined in the next section, from the outset.

2) Operation Mikado: A Bold Plan, a Deadly Reality

Operation Mikado was the most daring, creative, and controversial military plan devised during the Falklands War. This operation is the most striking example of how the myth of ‘invincibility’ woven around special forces clashed with the brutal realities of the battlefield. While appearing on paper as a bold ‘coup de main’ strike, when the enemy's preparations and the geographical challenges of the terrain were taken into account, this plan became a near-certain suicide mission for those involved. Mikado highlights the fine line between boldness and pragmatism in military planning and the potential disaster that can arise when that line is crossed.

Concept and Objectives

Operation Mikado's basic concept relied on shock and surprise. The plan envisaged two C-130 Hercules transport aircraft carrying SAS soldiers from B Squadron landing directly on the runway of Argentina's Rio Grande air base. After landing, the SAS soldiers would exit the aircraft in specially modified Land Rover vehicles, destroy the Super Étendard aircraft and Exocet missiles at the base, and then the Hercules aircraft would take off and leave the area.

This plan was largely inspired by the successful Entebbe raid by Israeli special forces in 1976. However, there was a world of difference between the inspiration and the operational conditions under which Mikado was planned. Entebbe had been carried out at a civilian airport against relatively unprepared and lightly armed enemies. Rio Grande, on the other hand, was one of the most strategic military bases in a country at war and was heavily defended. This fundamental difference was largely overlooked by the planners.

Logistical and Tactical Planning

The backbone of the operation was the Royal Air Force (RAF), which made extraordinary efforts to make this mission technically possible. However, the plan itself was fraught with extremely risky and almost impossible elements:

Air-to-Air Refuelling: In order to reach a target 8,000 miles away, C-130 Hercules aircraft were equipped with air-to-air refuelling capability in record time. This technological achievement formed the basis of the operation.

Infiltration Route: A complex route was planned for the Hercules aircraft to secretly infiltrate Argentine airspace via Chile, flying at extremely low altitude while following valleys. This route entailed severe turbulence, precise navigation challenges, and the risk of detection.

Landing Procedure: The most dangerous phase of the plan was the requirement for two heavy transport aircraft to land simultaneously on an unlit runway, possibly in strong tailwinds. This was an extremely dangerous manoeuvre even under peacetime conditions.

Laarbruch and Kinloss Exercises: Similar exercises conducted by the RAF and SAS prior to the war had demonstrated a fatal flaw in this mission concept: Hercules aircraft were detected by radar and symbolically ‘shot down’ when approaching a well-defended airfield. The decision by senior SAS and RAF command to disregard this concrete evidence constitutes one of the operation's most glaring analytical failures. This was not merely a situational weakness but also an institutional blindness stemming from the RAF hierarchy's myopic doctrine that ‘the Hercules will never be sent anywhere it could come under fire.’

Opposing Force Analysis: The Rio Grande Defence

To understand why Operation Mikado was characterised as a ‘suicide mission,’ it suffices to examine the defensive arrangements of the Rio Grande airfield under the command of Capitán de Navío Miguel Pita. More importantly, Pita was a highly capable commander who had trained at Fort Monckton in England and with the SBS, and therefore knew the mentality and tactics of British special forces intimately. The defence he prepared was a clever countermeasure designed against a known threat rather than a general military preparedness.

Military Strength: Approximately 3,000 marines, among Argentina's most elite troops, were deployed at and around the base.

Air Defence Weapons: The base was protected by a layered air defence system that was lethal against slow and large targets such as C-130s. These included radar-guided Rheinmetal 20mm, Bofors 40mm and Hispano-Suiza 30mm anti-aircraft guns.

Command and Control: The base's command centre was run from bomb shelters metres below ground, known as ‘El Pozo’ (The Pit).

Physical and Psychological Barriers: Pita had equipped the perimeter of the runway and strategic approach routes with fake minefields to impede the movement of SAS vehicles. He had marked the gaps between these fields, knowing they would be photographed by American satellites and that this misleading information would reach the SAS. This was not only a physical defence, but also a psychological and deception-based one.

Cancellation Decision and Analysis

Operation Mikado was definitively cancelled not for a single reason, but due to a combination of military and strategic factors. These factors confirmed the inherent illogicality and impracticability of the plan:

Lack of Intelligence: The failure of Operation Plum Duff deprived Mikado of its most vital element: up-to-date field intelligence. Launching such an operation without any concrete information about the defence of the Rio Grande was a blind gamble.

Logistical Imperative: The sinking of the MV Atlantic Conveyor on 25 May (using Argentina's third and fourth missiles) placed the British Task Force in a critical situation in terms of Chinook helicopters and logistical supplies. Following this loss, the two C-130 Hercules aircraft assigned to the operation became indispensable for transporting urgent supplies to the Task Force.

Strategic Value Loss: After Argentina used its last air-launched Exocet missile on 30 May, the Super Étendards at Rio Grande ceased to be primary strategic targets. There was no longer a target that would justify such a high-risk operation.

Although the cancellation of Mikado was a disappointment for the SAS soldiers and RAF pilots who were to take part in the operation, it was a strategic gain for the British war effort. This cancellation also reflected broader command-and-control issues concerning the use of special forces and another similarly problematic operation involving the Special Boat Service (SBS), which will be discussed in the next section.

3) Operation Kettledrum: An Overlooked SBS Mission

Operation Kettledrum is a prime example demonstrating that the systematic planning and command-control deficiencies in the special forces operations planned against mainland Argentina during the Falklands War were not unique to the SAS, but also extended to Britain's elite naval commando unit, the Special Boat Service (SBS). This operation highlights the dangerous communication breakdown between central planners in London and field commanders in the South Atlantic, and how unrealistic objectives can lead to disaster.

Mission Definition and Objective

Operation Kettledrum's objective was defined as an SBS team, operating from the diesel-electric submarine HMS Onyx, conducting a raid on targets in the port of Puerto Deseado, in southern Argentina. However, this objective fundamentally conflicted with the strategic priorities at that stage of the war. The Super Étendard aircraft, the source of the Exocet threat, were based in Rio Grande, not Puerto Deseado. Consequently, the operation made no concrete contribution to the primary strategic threat, undermining the rationale for the plan from the outset.

Command, Control and Planning Problems

The most critical problem with Operation Kettledrum was the breakdown in the chain of command. The plan had been developed by the Special Operations Group (SOG) in London. However, this plan had been prepared without consulting or informing Commodore Clapp and Brigadier General Thompson, the commanders of the Amphibious Task Group in the area where the operation was to be carried out.

Field commanders at San Carlos were not informed about the operation until the last minute, and when they learned of the plan, they described it as utter ‘madness.’ This command disconnect mirrored the ‘security bubbles’ and weak integration issues criticised by General Moore regarding the SAS, indicating a systemic problem. There were critical tactical obstacles that the planners in London had overlooked:

The strong tidal currents in the Puerto Deseado River made it extremely difficult to infiltrate secretly from a submarine and to withdraw after the operation.

Conducting operations in shallow and dangerous waters posed significant risks for a conventional submarine like HMS Onyx.

Cancellation and Assessment of the Operation

Operation Kettledrum was cancelled before it ended in disaster. The most important factor in this decision was the common sense and realistic assessments of the commanders on the ground.

The commander of HMS Onyx and the SBS team leaders on board combined their strong and logical objections to the plan's feasibility with ‘objections from San Carlos’ and relayed them up the chain of command.

This incident is proof of how theoretical assumptions in central planning collapse when confronted with operational reality on the ground. The clear assessment by the commanders on the ground that the risks of the mission far outweighed the potential gains led to the cancellation of the ‘paper’ plan in London. The cancellation of Kettledrum stands out as a rare but vital example of how experience on the ground and realistic risk analysis can correct errors in central planning.

Operations Plum Duff, Mikado and Kettledrum were not isolated failures or cancellations, but rather symptoms of deeper and more systematic problems concerning the use of British special forces in the Falklands War. These problems were concentrated in the areas of command and control, intelligence and planning, and will be analysed in detail in the next section.

Overall Assessment and Lessons Learned

The three special forces operations planned against mainland Argentina during the Falklands War but either failed or were cancelled—Plum Duff, Mikado, and Kettledrum—contain critical lessons for British military planning and command doctrine. These operations, despite their bold and daring nature, were built on a fundamentally flawed intelligence understanding, a weak command and control structure, and unrealistic expectations. Ultimately, the failure of these missions saved Britain from a potential military and diplomatic disaster, resulting in a strategic gain.

Command, Control and Communication

The operations analysed revealed a tendency for British special forces, particularly the SAS, to operate dangerously independently of the main task force in conventional warfare. As Army Commander General Moore noted in his post-war report, the SAS's integration with the main command centre was a serious problem: ‘No link was established, and the 3rd Commando Brigade had very little idea what was happening on a relatively exposed flank.’ The fact that special forces operated within their own ‘security bubbles’ and through dedicated communication channels led to dangerous friction and coordination failures within an integrated command structure. The fact that the SAS's operational report was concealed from General Moore at the end of the war demonstrates how deep and institutionalised this disconnect was.

The Role of Intelligence and Planning

The common denominator of all three operations was planning based on inadequate, outdated and often erroneous intelligence. This situation proves how vital the fundamental military principle is that the success of special forces operations depends not so much on sheer audacity as on meticulous planning and reliable intelligence.

Operation Plum Duff is a textbook example of how a reconnaissance mission, conducted with primitive maps and zero tactical intelligence, was doomed to failure.

Operation Mikado was planned despite concrete evidence from the Laarbruch and Kinloss exercises. The doctrinal blindness of the RAF hierarchy, which held that ‘the Hercules would never be sent anywhere it could come under fire,’ paved the way for these facts to be ignored.

These operations clearly demonstrate the potential consequences of disregarding the fact that intelligence is not a ‘wish’ but a ‘prerequisite’ for an operation.

Strategic Impact and Consequences

The actual execution and failure of these operations could have had devastating strategic consequences for Britain's war effort. Ironically, the cancellation or failure of these operations played a positive role in winning the war.

The probable failure of Operation Mikado would have resulted in the loss of an entire SAS squadron and two C-130 Hercules aircraft, which were vital for the logistical resupply of the Task Force. This would have dealt an irreparable blow to British war efforts, particularly after the loss of the MV Atlantic Conveyor.

An overt attack on the Argentine mainland could have dangerously escalated the war and increased diplomatic and even military support for Argentina from other Latin American countries that had remained neutral until then.

Ultimately, the fact that these bold but flawed plans were never implemented was a strategic stroke of luck for Britain. The failure of Plum Duff and the cancellation of Mikado and Kettledrum spared British special forces and critical military assets from unnecessary destruction. These operations have gone down in military history as proof that even the most daring plans are doomed to failure without solid intelligence, realistic risk analysis, and an integrated command structure.