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Part of the Battle of Britain
British and German aircraft a dog fight.jpg
An air battle, 1940
Date13 August 1940 [1]
Result British victory [2]
Flag of the United Kingdom.svg  United Kingdom Flag of Germany (1935-1945).svg  Nazi Germany
Commanders and leaders
Hugh Dowding
Keith Park
Charles Portal
Hermann Göring
Albert Kesselring
Hugo Sperrle
Robert Ritter von Greim
Joseph Schmid
Casualties and losses
Fighter Command:
13 fighters (air) [3]
1 fighter (ground) [2]
3 fighter pilots killed [2]
RAF Bomber Command:
11 bombers (air) [2]
24 aircrew killed [2]
9 captured [4]
47 miscellaneous aircraft (ground) [2]
c. several hundred civilians [5]
47 [3] [6] –48 [7] aircraft destroyed (air)
39 severely damaged [7]
circa 200 killed or captured including:
44 killed
23 wounded
at least 45 missing [8]

Adlertag ("Eagle Day") [9] [10] [11] [12] [13] was the first day of Unternehmen Adlerangriff ("Operation Eagle Attack"), which was the codename of a military operation by Nazi Germany's Luftwaffe (German air force) to destroy the British Royal Air Force (RAF). By June 1940, the Allies had been defeated in Western Europe and Scandinavia. Rather than come to terms with Germany, Britain rejected all overtures for a negotiated peace.

Nazi Germany The German state from 1933 to 1945, under the dictatorship of Adolf Hitler

Nazi Germany is the common English name for Germany between 1933 and 1945, when Adolf Hitler and his Nazi Party (NSDAP) controlled the country through a dictatorship. Under Hitler's rule, Germany was transformed into a totalitarian state where nearly all aspects of life were controlled by the government. The official name of the state was Deutsches Reich until 1943 and Großdeutsches Reich from 1943 to 1945. Nazi Germany is also known as the Third Reich, meaning "Third Realm" or "Third Empire", the first two being the Holy Roman Empire (800–1806) and the German Empire (1871–1918). The Nazi regime ended after the Allies defeated Germany in May 1945, ending World War II in Europe.

<i>Luftwaffe</i> Aerial warfare branch of the German military forces during World War II

The Luftwaffe was the aerial warfare branch of the combined German Wehrmacht military forces during World War II. Germany's military air arms during World War I, the Luftstreitkräfte of the Army and the Marine-Fliegerabteilung of the Navy, had been disbanded in May 1920 as a result of the terms of the Treaty of Versailles which stated that Germany was forbidden to have any air force.

United Kingdom Country in Europe

The United Kingdom (UK), officially the United Kingdom of Great Britain and Northern Ireland, and sometimes referred to as Britain, is a sovereign country located off the north-western coast of the European mainland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, and many smaller islands. Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state, the Republic of Ireland. Apart from this land border, the United Kingdom is surrounded by the Atlantic Ocean, with the North Sea to the east, the English Channel to the south and the Celtic Sea to the south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of 242,500 square kilometres (93,600 sq mi), the United Kingdom is the 78th-largest sovereign state in the world. It is also the 22nd-most populous country, with an estimated 66.0 million inhabitants in 2017.


During the Battle of Britain, Hitler gave the German armed forces ( Wehrmacht ) a directive (Directive No. 16) that ordered provisional preparations for invasion of Britain. [14] This operation was codenamed Operation Sea Lion (Unternehmen Seelöwe). Before this could be carried out, air superiority or air supremacy was required. The Luftwaffe was to destroy the RAF in order to prevent it from attacking the invasion fleet or providing protection for the Royal Navy's Home Fleet which might attempt to prevent a landing by sea. On 1 August Hitler gave the Luftwaffe's commander-in-chief, Reichsmarschall (Empire Marshal) Hermann Göring and the Oberkommando der Luftwaffe (High Command of the Air Force) a directive (Directive No. 17) to launch the air assault.

Battle of Britain Air campaign between Germany and the United Kingdom during the Second World War

The Battle of Britain was a military campaign of the Second World War, in which the Royal Air Force (RAF) defended the United Kingdom (UK) against large-scale attacks by Nazi Germany's air force, the Luftwaffe. It has been described as the first major military campaign fought entirely by air forces. The British officially recognise the battle's duration as being from 10 July until 31 October 1940, which overlaps the period of large-scale night attacks known as The Blitz, that lasted from 7 September 1940 to 11 May 1941. German historians do not accept this subdivision and regard the battle as a single campaign lasting from July 1940 to June 1941, including the Blitz.

<i>Wehrmacht</i> unified armed forces of Germany from 1935 to 1945

The Wehrmacht was the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the Heer (army), the Kriegsmarine (navy) and the Luftwaffe. The designation "Wehrmacht" replaced the previously used term Reichswehr, and was the manifestation of the Nazi regime's efforts to rearm Germany to a greater extent than the Treaty of Versailles permitted.

Operation Sea Lion Cancelled plan for Nazi invasion of Britain in World War II

Operation Sea Lion, also written as Operation Sealion, was Nazi Germany's code name for the plan for an invasion of the United Kingdom during the Battle of Britain in the Second World War. Following the Fall of France, Adolf Hitler, the German Führer and Supreme Commander of the Armed Forces, hoped the British government would seek a peace agreement and he reluctantly considered invasion only as a last resort if all other options failed. As a precondition, he specified the achievement of both air and naval superiority over the English Channel and the proposed landing sites, but the German forces did not achieve either at any point during the war, and both the German High Command and Hitler himself had serious doubts about the prospects for success. Nevertheless both the German Army and Navy undertook a major programme of preparations for an invasion: training troops, developing specialised weapons and equipment, and modifying transport vessels. A large number of river barges and transport ships were gathered together on the Channel coast, but with Luftwaffe aircraft losses increasing in the Battle of Britain and no sign that the Royal Air Force had been defeated, Hitler postponed Sea Lion indefinitely on 17 September 1940 and it was never put into action.

The essential target was RAF Fighter Command. The service's destruction would deny the British their air superiority asset. Throughout July and early August, the Germans made preparations for Adlertag. The date of the assault was postponed several times because of bad weather. Eventually, it was carried out on 13 August 1940. The German attacks on 13 August inflicted significant damage and casualties on the ground, but, marred by poor intelligence and communication, they did not make a significant impression on Fighter Command's ability to defend British air space. [15]

RAF Fighter Command

RAF Fighter Command was one of the commands of the Royal Air Force. It was formed in 1936 to allow more specialised control of fighter aircraft. It served throughout the Second World War. It earned great fame during the Battle of Britain in 1940, when the Few held off the Luftwaffe attack on Britain. The Command continued until 17 November 1943, when it was disbanded and the RAF fighter force was split into two categories; defence and attack. The defensive force became Air Defence of Great Britain (ADGB) and the offensive force became the RAF Second Tactical Air Force. Air Defence of Great Britain was renamed back to Fighter Command in October 1944 and continued to provide defensive patrols around Great Britain. It was disbanded for the second time in 1968, when it was subsumed into the new Strike Command.

Göring had promised Hitler that Adlertag and Adlerangriff would achieve the results required within days, or at worst weeks. [16] It had meant to be the beginning of the end of RAF Fighter Command, but Adlertag and the following operations failed to destroy the RAF, or gain the necessary local air superiority. [15] As a result, Operation Sea Lion was postponed indefinitely.


Strategic overview

After the declaration of war on Nazi Germany by Britain and France in the aftermath of the German invasion of Poland, nine months of stalemate took place along the Western Front. After the Polish Campaign, in October 1939, the planners of the Oberkommando der Luftwaffe (Luftwaffe High Command) and the Oberkommando der Wehrmacht (Supreme Command of the Armed Forces) turned their attentions to Western Europe. [17]

France Republic with mainland in Europe and numerous oversea territories

France, officially the French Republic, is a country whose territory consists of metropolitan France in Western Europe and several overseas regions and territories. The metropolitan area of France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. It is bordered by Belgium, Luxembourg and Germany to the northeast, Switzerland and Italy to the east, and Andorra and Spain to the south. The overseas territories include French Guiana in South America and several islands in the Atlantic, Pacific and Indian oceans. The country's 18 integral regions span a combined area of 643,801 square kilometres (248,573 sq mi) and a total population of 67.3 million. France, a sovereign state, is a unitary semi-presidential republic with its capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban areas include Lyon, Marseille, Toulouse, Bordeaux, Lille and Nice.

Western Front (World War II) military theatre of World War II encompassing Denmark, Norway, Luxembourg, Belgium, the Netherlands, the United Kingdom, France, Italy, and Germany

The Western Front was a military theatre of World War II encompassing Denmark, Norway, Luxembourg, Belgium, the Netherlands, the United Kingdom, France, Italy, and Germany. World War II military engagements in Southern Europe and elsewhere are generally considered under separate headings. The Western Front was marked by two phases of large-scale combat operations. The first phase saw the capitulation of the Netherlands, Belgium, and France during May and June 1940 after their defeat in the Low Countries and the northern half of France, and continued into an air war between Germany and Britain that climaxed with the Battle of Britain. The second phase consisted of large-scale ground combat, which began in June 1944 with the Allied landings in Normandy and continued until the defeat of Germany in May 1945.

<i>Oberkommando der Luftwaffe</i> 1944-1945 command staff of the German Air Force

The Oberkommando der Luftwaffe (OKL), translated as the High Command of the Air Force, was the high command of the Luftwaffe.

The German offensive—named Unternehmen Gelb (Operation Yellow), and also known as the Manstein Plan—began in the West on 10 May 1940. The central campaign—the Battle of France—ended in Allied defeat and the destruction of the main French Army forces. The British Expeditionary Force escaped during the Battle of Dunkirk, but the Wehrmacht captured Paris on 14 June and overran ⅔ of France. The French surrendered on 25 June 1940. [18]

Manstein Plan

The Manstein Plan is one of the names used to describe the war plan of the German Army during the Battle of France in 1940. The original invasion plan was a compromise devised by General Franz Halder, the chief of the Oberkommando des Heeres staff and satisfied no one. Documents with details of the plan fell into Belgian hands during the Mechelen incident of 10 January 1940 and the plan was revised several times, each giving more emphasis to an attack by Army Group A through the Ardennes, which progressively reduced the offensive by Army Group B through the Low Countries to a diversion.

Battle of France Successful German invasion of France in 1940

The Battle of France, also known as the Fall of France, was the German invasion of France and the Low Countries during the Second World War. In the six weeks from 10 May 1940, German forces defeated Allied forces by mobile operations and conquered France, Belgium, Luxembourg and the Netherlands, bringing land operations on the Western Front to an end until the Normandy landings on 6 June 1944. Italy entered the war on 10 June 1940 and invaded France over the Alps.

French Army Land warfare branch of Frances military

The French Army, officially the Ground Army to distinguish it from the French Air Force, Armée de l'Air or Air Army, is the land-based and largest component of the French Armed Forces. It is responsible to the Government of France, along with the other four components of the Armed Forces. The current Chief of Staff of the French Army (CEMAT) is General Jean-Pierre Bosser, a direct subordinate of the Chief of the Defence Staff (CEMA). General Bosser is also responsible, in part, to the Ministry of the Armed Forces for organization, preparation, use of forces, as well as planning and programming, equipment and Army future acquisitions. For active service, Army units are placed under the authority of the Chief of the Defence Staff (CEMA), who is responsible to the President of France for planning for, and use, of forces.

With Western Europe neutralised, the OKL and OKW turned their attention to Britain, which was now home to the Allied base of operations in Europe. Hitler hoped Britain would negotiate for an armistice, for which he was prepared to offer generous terms. The tentative offers made by Hitler were rejected by the Churchill coalition government. [19] Hitler now ordered the Luftwaffe and Kriegsmarine to prepare for an amphibious assault of Britain, codenamed Operation Sealion. The Luftwaffe was to eliminate enemy air power and the Kriegsmarine was ordered to make all the necessary preparations for transporting the Heer (Army) across the English Channel. The Luftwaffe's task came first. Once the RAF had been rendered impotent, Göring and Hitler hoped that an invasion would be unnecessary. [20] If this proved not to be the case, the Luftwaffe would then support the army and prevent the Royal Navy interdicting German sea traffic. [21] [22] Göring named the offensive against the RAF as Operation Eagle Attack (Adlerangriff). [23]

Background: early battles

The losses of the spring campaign had weakened the Luftwaffe before the Battle of Britain. The service was forced to wait until it had reached acceptable levels before a main assault against the RAF could be made. [24] Therefore, the first phase of the German air offensive took place over the English Channel. It rarely involved attacks against RAF airfields inland, but encouraged RAF units to engage in battle by attacking British Channel convoys. These operations would last from 10 July-8 August 1940. [25] The attacks against shipping were not successful; only 24,500 long ton s (24,900  t ) was sunk. Mine laying from aircraft had proved more profitable, sinking 38,000 long tons (39,000 t). [26] The impact on Fighter Command was minimal. It had lost 74 fighter pilots killed or missing and 48 wounded in July, and its strength rose to 1,429 by 3 August. By that date, it was only short of 124 pilots. [27]

In the second phase of attacks, shipping, coastal airfields, radar and stations south of London were attacked during 8–18 August. The Luftwaffe gradually increased the frequency of attacks. German bombers also raided targets as far north as Liverpool during night hours. [28] The first major raid inland and against RAF airfields came on 12 August. RAF Hawkinge, Lympne, Manston and radar stations at Pevensey, Rye and Dover were to be destroyed. Portsmouth docks were also targeted. [29] The results of the raids were mixed. The Radar station at Ventnor was badly damaged and others targeted were also damaged, but not destroyed. All were in working order by the following morning. The attacks against the harbour and RAF stations had failed to destroy them. All were not in fully working order by the end of the day, but were back in action the following morning. Unknown to German intelligence, Lympne itself was not even an operational station. This sort of intelligence blunder contributed to the failure of Adlertag. [30]

The Germans had not achieved a degree of success commensurate with their exertions. Nevertheless, in the belief they were having considerable effect on Fighter Command, they prepared to launch their all-out assault on the RAF the following day. [31] By 12 August, German air strength had reached acceptable levels. After bringing its serviceable rates up, the Luftwaffe began Adlertag with 71 percent of its bomber force, 85 percent of its Bf 109 units, and 83 percent of its Bf 110 units operational. [32]

Luftwaffe preparations


Radar covered the indicated air space. Battle of Britain map.svg
Radar covered the indicated air space.

Faulty intelligence was the component that was mostly responsible for the failure of Adlertag. While the gap between the British and Germans was not yet wide in this regard, the British were starting to gain a decisive lead in intelligence. The breaking of the Enigma machine and poor Luftwaffe signals discipline allowed the British easy access to German communications traffic. The impact of Ultra on the Battle of Britain is a matter of dispute, with Official Histories claiming there was no direct impact. Whatever the truth, Ultra, and the Y service in particular, gave the British an increasingly accurate picture of German order of battle deployments. [33]

Joseph "Beppo" Schmid was commander of the Luftwaffe's Military Intelligence Branch (Abteilung 5 as Chief IC). Throughout this time, Schmid's reports made a series of errors. In July 1940, Schmid grossly overestimated the strengths of the Luftwaffe and underestimated the RAF. The most serious mistakes were made concerning radar, airfield identification, and production sites. Schmid asserted that the number of operational airfields in southern England were severely limited; estimated that the British could produce only 180–330 fighters per month (the true figure was 496) and that figure would decrease, indicating that the RAF could not sustain a long battle of attrition. Schmid also claimed the command at all levels was rigid and inflexible, with fighters being tied to home bases. In his list of omissions, Schmid failed to mention the RAF maintenance and organisation operations, which put back damaged aircraft with rapid effect. He anticipated a short battle. Crucially, Schmid failed to mention radar at all. [34] [35] [36]

The lack of sustained and concentrated attacks on radar left it free to help direct the deployment of RAF units at opportune moments. Its continued warnings of incoming raids were a crucial benefit to Fighter Command. The Luftwaffe also had poor intelligence on the type of RAF airfields. It made repeated errors, often misidentifying airfields as Fighter Command bases, which turned out to belong to RAF Coastal Command and RAF Bomber Command. On Adlertag, most of the targets on the Luftwaffe's list—if destroyed—would not have impaired Fighter Command in the slightest. [37]

Bundesarchiv Bild 183-R93434, Albert Kesselring.jpg
Albert Kesselring commanded Luftflotte 2.
Bundesarchiv Bild 146-1987-121-30A, Hugo Sperrle.jpg
Hugo Sperrle, commanded Luftflotte 3.

Targets and order of battle

The following targets were chosen for attack on 13 August 1940:

Attack on 13 August 1940
German bomber unitTarget
Kampfgeschwader 1 (KG 1) RAF Biggin Hill [38]
Kampfgeschwader 76 (KG 76) [39] RAF Kenley [39] RAF Debden [39] /RAF Biggin Hill [40] / Other unknown targets [41]
Kampfgeschwader 2 (KG 2) RAF Hornchurch [42] /RAF Eastchurch [43] /RAF Manston
Kampfgeschwader 3 (KG 3)RAF Eastchurch [38] [Notes 1] [44]
Kampfgeschwader 53 (KG 53) RAF North Weald [45]
Erprobungsgruppe 210 Radar Stations; Rye, Pevensey, Dover. RAF Hawkinge/RAF Manston/RAF Kenley [46]
Kampfgeschwader 4 (KG 4)Unknown targets (lack of records)/some mine laying operations in English Channel [47]
Kampfgeschwader 40 (KG 40) RAF Dishforth
Kampfgeschwader 26 (KG 26)RAF Dishforth [48] /Linton-on-Ouse [44]
Kampfgeschwader 30 (KG 30) RAF Driffield [49]
Kampfgeschwader 27 (KG 27)Ports of Bristol/Birkenhead/Liverpool [50]
Lehrgeschwader 1 (LG 1) [51] RAF Worthy Down [51] / Ports of Southampton, Portsmouth and surrounding airfields [52] /RAF Detling [53] [54] /Other unspecified operations [55]
Sturzkampfgeschwader 3 (StG 3)StG 3 was to take part. For unknown reasons it was removed from the order of battle on 13 August. [56] Another source asserts that the unit had its missions cancelled owing to poor weather. [57]
Kampfgeschwader 51 (KG 51) RAF Bibury [58] /Spithead harbour [59] /Ventnor radar station
Kampfgeschwader 54 (KG 54)Fleet Air Arm base Gosport [60] /RAF Croydon [61] RAF Farnborough [62] RAF Odiham [63]
Kampfgeschwader 55 (KG 55) Plymouth [64] /Feltham [65] /RAF Middle Wallop [66]
Sturzkampfgeschwader 1 (StG 1) RAF Warmwell [15] /RAF Detling [54]
I., and II./Sturzkampfgeschwader 2 (StG 2) Portland area and airfields [15] /RAF Middle Wallop/RAF Warmwell [15] /Yeovil
Sturzkampfgeschwader 77 (StG 77)RAF Warmwell/Portland [62]

RAF preparations


Hugh Dowding, C-in-C Fighter Command. Hugh Dowding.jpg
Hugh Dowding, C-in-C Fighter Command.

The keystone of the British defence was the complex infrastructure of detection, command, and control that ran the battle. This was the "Dowding System", after its chief architect, Air Chief Marshal Sir H.C.T. "Stuffy" Dowding, the commander-in-chief of RAF Fighter Command. Dowding modernised a system created up from 1917 by Major General E B Ashmore. [67] The core of Dowding's system was implemented by Dowding himself: the use of Radio Direction Finding (RDF or radar) was at his behest, and its use, supplemented by information by the Royal Observer Corps (ROC), was crucial to the RAF's ability to efficiently intercept incoming enemy aircraft. The technology was named RDF with misleading intent – the vague description would disguise the full nature of the system to the enemy if its existence ever became known. [68] [69]

The first indications of incoming air raids were received by the Chain Home Radio Direction Finding (RDF) facilities, which were located along the coastlines of Britain. In most circumstances, RDF could pick up formations of Luftwaffe aircraft as they organised over their own airfields in northern France and Belgium. Once the raiding aircraft moved inland, the formations were also plotted by the ROC. The information from RDF and the Observer Corps were sent through to the main operations room of Fighter Command Headquarters at RAF Bentley Priory. The plots were assessed to determine whether they were "hostile" or "friendly". If hostile, the information was sent to the main "operations room", which was in a large underground bunker. [70]

Plotting raids

Here, the course information of each raid was plotted by Women's Auxiliary Air Force (WAAF), who received information by telephone. [71] Additional intelligence was provided by the Y Service radio posts, which monitored enemy radio communications, and the Ultra decoding centre based at Bletchley Park, which gave the RAF intelligence on the German order of battle. [72] Colour-coded counters representing each raid were placed on a large table, which had a map of Britain overlaid and squared off with a British Modified Grid. As the plots of the raiding aircraft moved, the counters were pushed across the map by magnetic "rakes". This system enabled the main "Fighter Controller" and Dowding to see where each formation was heading, at what height, and in what strength. This allowed an estimate to be made of possible targets. The age of the information was denoted from the colour of the counter. The simplicity of the system meant that decisions could be made quickly. [70]

Communication and interception

This information was simultaneously sent to the headquarters of each Group where it was cross-checked through a filter room before being sent through to another operations room, housed in an underground bunker. Because Group had tactical control of the battle, the operations room was different in layout from the main Headquarters at Bentley Priory. The main map on the plotting table represented the Group command area and its associated airfields. Extensive radio and telephone equipment transmitted and received a constant flow of information from the various sector airfields as well as the Observer Corps, AA Command and the navy. The "Duty fighter controller" was the Group GOC's personal representative and was tasked with controlling how and when each raid would be intercepted. If the telephone system failed engineers would be on site within minutes to repair the broken links. [70]


KG 2 raid

Dornier Do 17s. These aircraft were flown by KG 2 through the Battle of Britain. Bundesarchiv Bild 101I-342-0603-25, Belgien-Frankreich, Flugzeuge Dornier Do 17.jpg
Dornier Do 17s. These aircraft were flown by KG 2 through the Battle of Britain.

On the morning of 13 August, the weather was bad and Göring ordered a postponement of raids. [62] However, the Dornier Do 17s of KG 2 were not informed and took off at 04:50 for their target. They were to meet with their escorts from ZG 26 over the Channel. ZG 26 received the cancellation order, but II., and III./KG 2 did not. KG 2 had formed up by 05:10, led by Geschwaderkommodore Johannes Fink. Part of the ZG 26 formation that had taken off—led by Oberstleutnant Joachim Huth—tried to warn the Dorniers of the cancellation. Unable to contact the bombers by radio, Huth tried to signal them by flying in front of them and performing aerobatics. Fink ignored him and flew on. KG 2 flew around the coast to his target, Eastchurch airfield on the Isle of Sheppey. Albert Kesselring had issued orders for bombers to abandon missions if their escorts did not show up, but Fink did not want to be accused on failing to obey orders and continued onward even though the Bf 110s turned back. The return leg would take KG 2 across No. 11 Group's territory, which could have been disastrous without fighter escort. But owing to the Observer Corps misjudging the direction of the bombers, owing to low-lying cloud, [73] and the radar not picking up the direction of the German bombers, the WAAF plotted the course of the raid incorrectly and the RAF failed to prevent the target being attacked. [1]

For an hour after dawn on 13 August, there were few German tracks upon the plot tables in operations rooms, and none at all in the central and eastern Channel. The first signs of concentration, however, came earlier than usual, for between 05:30 and 05:40 two formations of 30 or more aircraft were located in the Amiens area. For 30 minutes, they remained over land, but at 06:10 they began moving inland. The Observer Corps and radar tracked them and guided the RAF units to intercept. Unaware of the German intent, the controllers directed three full Squadrons and detachments of three others were alerted by 06:15. No. 151 was protecting a convoy in the Thames, No. 111 was protecting RAF Hawkinge and No. 74 Squadron RAF was covering RAF Manston. Parts of No. 85, No. 43 and No. 238 Squadron RAF were also airborne near London. By 06:25, the German formations were well over the Channel. No. 238 was moved to cover their own base at RAF Warmwell. No. 257 Squadron RAF was also ordered to take off at 06:20 to patrol Canterbury. Not satisfied with the strength of the forces already airborne, controllers dispatched No. 601, 213, 64 and 87 Squadrons to intercept between 06:30 and 06:35. The first combats began at 06:30. [74]

Owing to the mistake by the Observer Corps, and the Geschwader being missed approaching the eastern, instead of central Channel by radar, KG 2 hit the RAF airfield. KG 2 claimed 10 Spitfires destroyed on the ground. In fact, no Fighter Command fighters were lost. For some time afterward, this wrong claim convinced German intelligence that Eastchurch was a fighter station and the Luftwaffe would launch seven fruitless raids on it in the coming weeks. Added to this mistake was the failure to keep up pressure. Raids were spaced out, giving the field time to recover. [75] The station was used by RAF Coastal Command, which lost five Bristol Blenheims in the attack and one Coastal Command Spitfire. However, severe damage was done to the infrastructure. Much equipment and ammunition was destroyed and 16 of the Command's personnel were killed. [76] RAF Eastchurch was back in operation by 16:00. [77] [78]

Eventually the bombers were intercepted. KG 2 lost five Do 17s in the attempt. Six Dorniers were also badly damaged. In return, accurate fire from the Dornier gunners shot down two Hurricanes from the attacking Squadrons; No. 111, No. 151 and No. 74 Squadron led by Adolph Malan. Malan himself shot down one Do 17. [79] Another source suggests the destruction of five Do 17s and another seven damaged. [80] German manpower losses amounted to 11 killed in action and nine prisoners of war. [57]

Coastal airfields and ports

Messerschmitt Bf 110s of 1./LG 1. The type suffered heavy losses on Adlertag. Bundesarchiv Bild 101I-427-0412-033, Flugzeug Messerschmitt Me 110.jpg
Messerschmitt Bf 110s of 1./LG 1. The type suffered heavy losses on Adlertag.

Most units of Luftflotte 2 received the order to abandon morning operations, but some began their attacks aimed at airfields and ports in southern Britain. KG 76 abandoned its attack on Debden [81] but struck at RAF Kenley and other airfields in Kent and Essex. Losses and results are unknown. [39] KG 27 also abandoned most of its operations. III./KG 27 did attempt to make it through to the Bristol docks, losing one He 111 to No. 87 Squadron RAF in the attempt. Little damage was done. [82]

The cancellation order had not reached Luftflotte 3 HQ at all. Its commander, Hugo Sperrle ordered attacks to commence. At 05:00, 20 Junkers Ju 88s of I./KG 54 took off to bomb the Royal Aircraft Establishment's airfield at 'RAF Farnborough' (RAE Farnborough). At 05:05, 18 Ju 88s from II./KG 54 took off for RAF Odiham. At 05:50, 88 Junkers Ju 87s of StG 77 began heading for Portland Harbour. The raids were escorted by about 60 Bf 110s of Zerstörergeschwader 2 (Destroyer Wing 2; ZG 2), and V./LG 1 and 173 Bf 109s from Jagdgeschwader 27 (JG 27), JG 53 and JG 3, which all flew ahead of the bomber stream to clear the airspace of enemy fighters. StG 77's target was obscured by cloud, but KG 54 continued to their target. RAF fighters from RAF Northolt, RAF Tangmere and RAF Middle Wallop intercepted. Four Ju 88s and one Bf 109 from JG 2 was shot down. The German fighters claimed six RAF fighters and the bombers another 14. In reality, the bombers only damaged five. The Bf 109s destroyed only one and damaged another. Of the five RAF fighters damaged by the bombers, two were write-offs. Of the 20 claimed, just three fighters were lost and three pilots were wounded. None were killed. [62] [83]

Further missions by II./KG 54 to RAF Croydon were cancelled. [61] I./KG 54 struck at the Fleet Air Arm (FAA) base at Gosport. [60] ZG 2 was supposed to provide escort during one these attacks, and in a breakdown of communications, arrived over the target without their Ju 88s, which had been ordered to stand down. One Bf 110 was shot down by No. 238 Squadron RAF. [84]

At 11:10, V./LG 1 Bf 110s took off in advance of a raid by KG 54, possibly to tempt RAF fighters into battle before the main assault, so the RAF would be out of position. The bombers' mission was cancelled. The order did not reach V./LG 1 who continued to their target area. The 23 Bf 110s continued to the target of Portland. They ran into No. 601 Squadron RAF Hurricanes and lost six Bf 110s destroyed and three damaged. Only one Hurricane was shot down and another damaged. [62] A second source states only four Bf 110s were destroyed, [85] whilst a third gives the loss of five destroyed and five damaged. [86] The Zerstörergeschwader optimistically claimed 30 RAF fighters destroyed (in reality RAF fighter losses in aerial combat amounted to 13 throughout the entire day), for a loss of 13 Bf 110s. [87] The morning's effort had been a fiasco. [15] The attacks showed a serious German technical failure in air-to-air communication. [16]

Renewed attacks

Junkers Ju 88s. In the mid-afternoon, this aircraft formed the backbone of German bomber formations. Bundesarchiv Bild 101I-363-2258-11, Flugzeug Junkers Ju 88.jpg
Junkers Ju 88s. In the mid-afternoon, this aircraft formed the backbone of German bomber formations.

The official go-ahead was given at 14:00. At 15:30, some 58–80 Ju 88s from I., II., and III./LG 1, escorted by 30 Bf 110s of V./LG 1, took off to bomb Boscombe Down and Worthy Down. RAF Andover was to be bombed as well, with the support of 52 Ju 87s from StG 1 and StG 2 who were to strike at RAF Warmwell and Yeovil. I./JG 53 flew a fighter sweep ahead of the bombers from Poole to Lyme Regis in order to tempt the RAF into battle. I./JG 53 made landfall at 16:00. The sweep failed to attract and divert RAF squadrons. Instead, all it succeeded in doing was to alert the RAF defences a critical five minutes earlier. When the main wave of LG 1 and StG 2 arrived over the coast, they were greeted by 77 RAF fighters. [88]

II., and III./JG 53 and III./ZG 76 flew escort for the Ju 87s. ZG 2 and JG 27 flew escort for LG 1. In response the whole of No. 10 Group RAF intercepted. One Staffel (Squadron) of II./StG 2 was badly hit by No. 609 Squadron RAF; six out of nine Ju 87s were shot down. [15] StG 1 and 2 gave up on their original targets owing to clouds. Both headed for Portland. [15]

I./LG 1 abandoned Boscombe Down and bombed Southampton instead. No. 238 Squadron had been detailed to intercept, but the fighter escort was too strong and the bombers were not diverted from their course. Several warehouses were destroyed and a cold storage plant was also knocked out. All fires were under control by dusk. [89] One III./LG 1 dropped its bombs by RAF Middle Wallop Sector Station by mistake. Only Andover airfield was hit, and it was used for bomber operations, not fighters. [15] III./LG 1 lost two Ju 88s. [57] The 13 Ju 88 Gruppen (Groups) had lost six destroyed and many damaged. They had escaped lightly. [90] The bombing succeeded in destroying a bicycle factory, a furniture warehouse and a refrigerated meat depot. [91] Luftwaffe intelligence had not identified the Southampton Spitfire factory—on the waterfront near the docks—as an important target. Poor intelligence suggested it was a bomber factory. Only later, in September, was it attacked and severely damaged. However, even then the Germans were unaware of the damage inflicted to Spitfire production. The factory would later be broken up and production dispersed. [92]

Ju 87 operations

Ju 87Bs. The Ju 87s severely damaged RAF Detling. Bundesarchiv Bild 183-1987-1210-502, Polen, Stukas.jpg
Ju 87Bs. The Ju 87s severely damaged RAF Detling.

StG 77 was also in action, escorted by JG 27 Bf 109s. StG 77s 52 Ju 87s were joined by 40 Ju 88s of KG 54. Both formations were heading for No. 10 Group RAF's airfields. StG 77 was targeting RAF Warmwell. The Geschwader failed to find its target, dropping its bombs at random. The other Ju 87 units had attracted much attention and StG 77 escaped unnoticed. [93]

Erprobungsgruppe 210 were sent further east for an operation to attack targets near Southend. They took off at 15:15 and were escorted by ZG 76. Unfortunately, they found unbroken cloud over Essex. No. 56 Squadron RAF intercepted, but Erprobungsgruppe 210 dropped their bombs over Canterbury. II./StG 1 was sent to bomb airfields near Rochester. It failed to find the target and returned without incident. IV./LG 1—also with Ju 87s—was sent after RAF Detling. JG 26 went out on a fighter sweep to clear the skies in advance of the attack. JG 26 lost one Bf 109 over Folkestone from an unknown cause. The Ju 87s bombed the station and 40 Bf 109s strafed it, killing the commander. [2] The operations block was hit, causing high casualties. The losses were disastrous for No. 53 Squadron RAF, which lost a number of Blenheims on the ground. [94] The commander killed was Group Captain E P Meggs-Davis. [95] One Squadron Leader was killed—a J.H Lowe—and a further two were wounded. One of the wounded men was a First World War ace Robert J. O. Compston. [96] The station's casualties amounted to 24 killed and 42 wounded. [97] However, Detling was not an RAF Fighter Command station and the attack did not affect No. 11 Group RAF in any way. [98]

South East raids

I., II., and III./KG 55 were also in action. III./KG 55 bombed Heathrow Airport. Results are unknown and losses are unclear. KG 55 suffered heavy losses the previous day, so its operations seemed limited. On 12 August it lost 13 Heinkel He 111s and their crews. The next day, 14 August, they would lose their Geschwaderkommodore (Wing Commander) Alois Stoeckl. [99] [100]

In the afternoon, a force of 80 Do 17s of KG 3—escorted by JG 51, JG 52, JG 54 and 60 Bf 109s from JG 26 (some 270 aircraft in all)—headed for Eastchurch airfield and the Short Brothers factory at Rochester. III./KG 3 broke away from the main formation and attacked Eastchurch while II./KG 3 headed for Rochester. Significant damage was done to the factory producing the Short Stirling heavy bomber. The RAF's No. 3, No. 64, No. 111, No. 151, No. 234, No. 249, No. 601 and No. 609 Squadrons intercepted. According to the account of JG 26, the British fighters made little impression on the bombers. [101] Three JG 51 Bf 109s were shot down in skirmishes with RAF fighters. [102]

RAF Bomber Command also took part in the day's fighting. Although Charles Portal—AOC (Air Officer Commanding)—had protested against the pointlessness of attacking airfields in Scandinavia, the Air Ministry insisted on such raids. No. 82 Squadron RAF sent 12 Bristol Blenheims to bomb KG 30 airfields at Aalborg, Denmark. One pilot turned back complaining of "fuel problems" and was court-martialled. That bomber was the only one to return. The rest fell to AAA fire and fighters. [2] Some 24 airmen were killed and nine were captured. [4]

Night raids

As darkness fell at the close of Adlertag, Sperrle sent nine Kampfgruppe 100 (Bombing Group 100) He 111s to conduct a strategic bombing raid against the Supermarine Spitfire factory at Castle Bromwich, Birmingham. Despite the group being a specialist night strike unit which had high expertise in night navigation, only four of the crews found their targets. The eleven 551 lb (250 kg) bombs dropped were not sufficient to disrupt fighter production. Around five of the 11 fell inside the compound. Casualties were small as workers had gone to shelter. Serious damage was done only to offices and a tool room, while a gas main was fractured. [103] Another group, led by Gruppenkommandeur Hauptmann (Captain) Friedrich Achenbrenner, dispatched 15 He 111s from bases in Brittany across the Irish Sea to strike at the Short Brothers factory at Queen's Island, Belfast Northern Ireland. Five Short Stirling aircraft were destroyed. KG 27 also took part in the missions, and bombed Glasgow during the night although their specific target is unclear. Other bombers, commencing the night stage of Adlertag, resolutely flew the length and breadth of Great Britain, bombing Bristol, Cardiff, Swansea, Liverpool, Sheffield, Norwich, Edinburgh and Aberdeen. Very little damage was done, though some rail tracks were cut temporarily and around 100 casualties were suffered. [104] [105] It is unknown if any German aircraft were lost. One German airman was found wandering around the countryside in Balcombe, Somerset. No other traces of the aircraft or other crew members were found. [103]


Effect of raids

The Germans had maintained the attacks on airfields in south-eastern England which they had started the previous day. On 12 August, most of the Kentish airfields had been attacked; and on 13 August, the Germans concentrated on the second line airfields south of London. The concentration on Detling and Eastchurch was a failure, as both were Coastal Command stations and bore no relation to Fighter Command. The Germans may have reasoned that if bases such as Manston, Hawkinge and Lympne were neutralised through the attacks on 12 August, then Fighter Command may have had to move onto these airfields. In fact, the bombing of 12 August had failed to knock out these strips, and Adlertag had failed to destroy or render Detling or Eastchurch nonoperational. [106] Owing to poor intelligence, weather conditions, and RAF resistance, attacks on other targets had failed or been unsuccessful.


Overclaiming in aerial warfare is not uncommon. During the Battle of Britain (and, indeed, the rest of the Second World War), both sides claimed to have shot down and destroyed more enemy aircraft on the ground and in the air than they had in reality. RAF Fighter Command claimed 78 German aircraft shot down on 13 August 1940. [2] Another source states that official RAF claims amounted to 64. [107] Actual German losses amounted to 47 [3] –48 [7] aircraft destroyed and 39 severely damaged. [7] Conversely, the Luftwaffe claimed to have destroyed 70 Hawker Hurricanes and Spitfires in the air and a further 18 Blenheim bombers in the air alone. This was an exaggeration of about 300 percent. [108] [109] Another 84 RAF fighters were claimed on the ground. [15] Actual RAF losses in the air amounted to 13 fighters and 11 bombers, with 47 aircraft of various kinds on the ground. [2]

Battle of Britain

The failure of Adlertag did not deter the Luftwaffe from continuing its campaign. The assault against RAF airfields continued throughout August and into September 1940. The battles involved large numbers of aircraft and heavy losses on both sides. The Luftwaffe failed to develop any focused strategy for defeating RAF Fighter Command. At first, it attempted to destroy RAF bases, then switched to strategic bombing by day and night. It tried to achieve the destruction of several British industries at the same time, switching from bombing aircraft factories, to attacking supporting industries, import or distribution networks such as coastal ports. An attempt was even made against unrelated targets, such as destroying the morale of the British population. [110]

The failure of the Luftwaffe to identify the radar chain and distinguish RAF fighter bases from those of other RAF commands undermined its ability to destroy the British fighter defences. The Luftwaffe underestimated British radar, and they had not realised its importance in the British operational system. [111] [112] To the contrary, OKL believed that the radar stations would benefit the German effort by sending RAF forces into large-scale air battles for the Luftwaffe to decimate. The RAF aircraft industry supported the losses and its pilots were replaced sufficiently to limit the RAF's decline in strength and deny the Germans victory. Conversely, the RAF were able to ensure the serviceability rates and aircrew numbers of the Luftwaffe declined in August–September. [Notes 2]

Having failed to defeat the RAF, the Luftwaffe adopted a different and clearer strategy of strategic bombing known as The Blitz. However, as with the campaign against the RAF, the types of targets differed radically and no sustained pressure was put under any one type of British target. [117] Disputes among the OKL staff revolved more around tactics than strategy. [118] This method condemned the offensive over Britain to failure before it had even begun. [119] The end result of the air campaign against Britain in 1940 and 1941 was a decisive failure to end the war. As Hitler committed Germany to ever increasing military adventures, the Wehrmacht became increasingly overstretched and was unable to cope with a multi-front war. By 1944, the Allies were ready to launch Operation Overlord, the invasion of Western Europe. The Battle of Britain ensured that the Western Allies had a base from which to launch the campaign and that there would be a Western Allied presence on the battlefield to meet the Soviet Red Army in central Europe at the end of the war in May 1945. [120] [121]


  1. de Zeng writes there is nothing published on KG 3. It was one of the most obscure bomber units, owing to the loss of most of its records at the end of the war. Their work is the most detailed available.
  2. Bungay notes that by between 27 August to 4 September 1940 that German bomber unit strength had shrunk to an average of 20 out of 35–40. Bf 109 units had declined to 18 out of 35–40 and Bf 110 units had shrunk even lower. Bungay also notes that the RAF pilot losses were 125 a week and the force was short by 150 pilots by 31 August 1940. Only 150 pilots could be replaced up to 21 September. Bomber pilots were converted to cope. Overall trend was up from July 1940. Murray focuses on German crew losses. Bf 109 units were running at 67 percent, Bf 110 units 46 percent, and bombers were at 59 percent establishment by 14 September. One week later it was 64, 52 and 52 percent respectively. It seemed that the Germans were "running out of aircraft". Wood and Dempster assert that RAF operational strength hardly declined, from 64.8 percent on 24 August to 64.7 percent on 31 August, and finally 64.25 percent on 7 September 1940. [113] [114] [115] [116]

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  1. 1 2 Bungay 2000, p. 207.
  2. 1 2 3 4 5 6 7 8 9 10 Bungay 2000, p. 211.
  3. 1 2 3 Bungay 2000, p. 371.
  4. 1 2 Donnelly 2004, pp. 88–89.
  5. Note excluding 4 casualties from Australia; the Commonwealth War Graves Commission lists only 25 Civilian casualties 13 August 1940
  6. Taylor and Moyes 1968, p. 23.
  7. 1 2 3 4 Hough and Richards 2007, p. 162.
  8. Mason 1969, pp. 240–243.
  9. Hough and Richards 2007, p. 154.
  10. Murray 1983, p. 50.
  11. Bungay 2000, p. 203.
  12. Fiest 1993, p. 28.
  13. Mason 1969, p. 236.
  14. Trevor-Roper 2004, pp. 74–79.
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  16. 1 2 Mackay 2003, p. 71.
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  18. Hooton 2007, pp. 47–48, p. 77, p. 86.
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  23. Hooton 2010, p. 75.
  24. Murray 1983, p. 44.
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  26. James 2000, p. 43.
  27. James 2000, p. 45.
  28. James 2000, pp. 49–62.
  29. James 2000, pp. 63–64, 70.
  30. James 2000, p. 70.
  31. James 2000, p. 71.
  32. Murray 1983, p. 51.
  33. Murray 1983, p. 47.
  34. Bungay 2000, pp. 187–188.
  35. Hooton 1994, pp. 19–20.
  36. Ray 2009, pp. 46–47.
  37. Mason 1969, pp. 236–237.
  38. 1 2 de Zeng 2007 Vol 1, p. 14.
  39. 1 2 3 4 de Zeng 2007 Vol 2, p. 228.
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  41. de Zeng 2007 Vol 2, p. 236.
  42. de Zeng 2007 Vol 1, p. 24.
  43. de Zeng 2007 Vol 1, p. 33.
  44. 1 2 de Zeng 2007 Vol 1, p. 48.
  45. de Zeng 2007 Vol 1, p. 171.
  46. Bungay 2000, pp. 203–212.
  47. de Zeng 2007 Vol 1, pp. 49–54.
  48. de Zeng 2007 Vol 1, p. 75.
  49. de Zeng 2007 Vol 1, p. 118.
  50. de Zeng 2007 Vol 1, p. 104.
  51. 1 2 de Zeng 2007 Vol 2, p. 360.
  52. de Zeng 2007 Vol 2, p. 266.
  53. de Zeng 2007 Vol 2, p. 370.
  54. 1 2 Ward 2004, p. 105.
  55. de Zeng 2007 Vol 2, p. 354.
  56. de Zeng 2010, p. 100.
  57. 1 2 3 Goss 2000, p. 79.
  58. de Zeng 2007 Vol 1, p. 155.
  59. de Zeng 2007 Vol 1, p. 146.
  60. 1 2 de Zeng 2007 Vol 1, p. 179.
  61. 1 2 de Zeng 2007 Vol 1, p. 184.
  62. 1 2 3 4 5 Bungay 2000, p. 208.
  63. James 2000, p. 74.
  64. de Zeng 2007 Vol 1, p. 195.
  65. de Zeng 2007 Vol 1, p. 198.
  66. de Zeng 2007 Vol 1, p. 193.
  67. Bungay 2000, pp. 62, 447 Note 23.
  68. Hough and Richards 2007. p. 51.
  69. Parker 2000, p. 117.
  70. 1 2 3 Bungay 2000, pp. 61–69.
  71. Parker 2000, p. 123.
  72. Bungay 2000, p. 192.
  73. Collier 1980, p. 51.
  74. James 2000, pp. 71–73.
  75. Bungay 2000, pp. 207–208.
  76. Mason 1969, p. 238.
  77. James 2000, p. 73.
  78. Hough and Richards 2007, p. 157.
  79. Hough and Richards 2007, pp. 155–157.
  80. Goss 2005, p. 60.
  81. de Zeng 2007 Vol 2, p. 232.
  82. Mason 1969, p. 241.
  83. MacKay 2001, p. 31.
  84. Mason 1969, pp. 238–239.
  85. de Zeng 2007 Vol 2, p. 372.
  86. Mackay 2000, p. 51.
  87. Weal 1999, p. 47.
  88. Mason 1969, p. 239.
  89. James 2000, p. 77.
  90. Weal 2000. p. 54.
  91. Korda 2009, p. 167.
  92. Mason 1969, p. 237.
  93. Mason 1969, pp. 239–240.
  94. Warner 2005, p. 258.
  95. RAF Station Commanders – South East England
  96. Saunders 2013, p. 211.
  97. Saunders 2013, p. 212.
  98. Mason 1969, p. 240.
  99. Dierich 1975, p. 39.
  100. Hall and Quinlan 2000, p. 18.
  101. Baker 1996, p. 113.
  102. Mason 1969, p. 242.
  103. 1 2 James 2000, p. 80.
  104. Mason 1969, p. 243.
  105. Goss 2000, p. 80.
  106. James 2000, p. 79.
  107. Bishop 2010, p. 179.
  108. Addison and Crang 2000, p. 58.
  109. Terraine 1985, p. 186.
  110. Murray 1983, p. 54.
  111. Parker 2000, p. 311.
  112. Bungay 2000, pp. 68–69.
  113. Bungay 2000, p. 298.
  114. Murray 1983, p. 52
  115. Parker 2000, p. 309.
  116. Wood and Dempster 2003, p. 306.
  117. Overy 1980, pp. 34, 36.
  118. Hooton 1997, p. 38.
  119. Bungay 2000, p. 379.
  120. Addison and Crang 2000, p. 270.
  121. Bungay 2000, pp. 393–394.


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