The Battle of Britain was the first major campaign to be fought only by air forces, and it was also the largest and longest aerial bombing campaign until then.
Part I: Strategic targets
In July 1940, coastal shipping convoys and shipping centres, such as Portsmouth, began to be the main targets. A month later, the Luftwaffe shifted its attacks to RAF airfields and infrastructure, which were other useful war targets. As the battle progressed, the Luftwaffe also targeted aircraft factories and ground infrastructure.
Coastal radar stations were bombed and so for a time, only one radar mast was standing. The British used a backup system of human observers to get information to the headquarters of Fighter Command. Most historians agree that Germany won that part of the campaign.[27]
Part II: Civilian targets
Eventually the Germans switched to attacking population centres, such as towns and cities, as well as factories. After the RAF bombed Berlin, and German air force bases in France, Hitler cancelled his orders not to bomb population centres and ordered attacks on British cities.[27]p305 The attacks on civilians were terror bombing tactics designed to cause panic and damage morale.
On 7 September 1940, a massive series of raids with nearly 400 bombers and more than 600 fighters targeted docks on the Thames in London day and night. This was called the "London blitz".
The RAF 11 Group rose to meet them in greater numbers than the Luftwaffe expected; 12 Group's Big Wing took 20 min to gain formation and missed its intended target, but it came across another formation of bombers while it was still climbing. The delay was blamed on being requested too late.[28][29]
The Luftwaffe began to stop its morning raids, with attacks on London starting late in the afternoon for 57 nights of attacks in a row.[30]
Fighter Command had been suffering low morale since it was short of men and machines, and the break from airfield attacks allowed it to recover and so week by week, the defenders were getting stronger, and the losses suffered by the Luftwaffe were growing.
On 15 September, two massive waves of German attacks were prevented by the RAF, with every aircraft of 11 Group being used that day. The total casualties on that important day were 60 German and 26 RAF aircraft shot down. The German defeat caused Hitler to order two days later a delay of the preparations for the invasion of Britain. In the face of increasing losses in men, aircraft and the lack of good replacements, the Luftwaffe later switched from daylight to night-time bombing.
On 27 September, a Junkers Ju 88 returning from a raid on London was shot down in Kent.[31] The German airmen survived to fight a battle against British troops stationed locally. That was said to be the first time in nearly 300 years that armed invaders had fought with British soldiers on British soil.[31]
Dowding system
The keystone of the British defence was the detection, command, and control, which ran the battle. It was called the Dowding System, after its chief architect, Air Chief Marshal Sir Hugh Dowding, the leader of RAF Fighter Command.
The core of the system was the use of Radio Direction Finding (RDF, later called radar after radio detection and ranging).[32] Its use, as was by information by the Royal Observer Corps, was crucial and allowed the RAF to intercept the incoming German aircraft.[33]
Radar operators were linked via telephone, whose wires were laid deep underground with concrete anti-bomb protection,[33]p47 to an operational centre, which was Fighter Command Control at Bentley Priory.[33] During the battle, several Coastal Command and Fleet Air Arm units came under Fighter Command control.
Fighters
The Germans' Messerschmitt Bf 109E and 110C fought against the British air superiority fighterss the workhorse Hawker Hurricane Mk I and the less numerous Supermarine Spitfire Mk I. The Bf 109E had a better climb rate and was 10 to 30 mph faster than the Hurricane, depending on the altitude.[27]p266 In September 1940, the more powerful Mk IIa series 1 Hurricane started to enter service but only in small numbers.[34] That version was capable of a maximum speed of 342 mph, 25 to 30 mph faster than the Mk I.[35]
The performance of the Spitfire during the Dunkirk evacuation came as a surprise although the German pilots retained a strong belief that their 109 was the superior fighter.[36] However, the Bf 109E had a much larger turning circle than either the Hurricane or the Spitfire.[27] The two British fighters had eight Browning 303 machine guns, but most Bf 109Es had two machine guns and two wing cannons. The Bf 109E and the Spitfire were superior to each other in key areas. For instance, at some altitudes, the Bf 109 could outclimb the British fighter.
Aftermath
The failure of Germany to achieve its objective of destroying Britain's air defences or forcing Britain to negotiate an armistice or an outright surrender is considered to be its first major defeat and one of the crucial turning points in the war.[27]p388
If Germany had gained air superiority, Adolf Hitler might have launched Operation Sea Lion, his planned invasion of Britain.
References
↑1 RCAF Squadron was not formed under Article XV because the unit was formed in Canada in 1937. When it was sent to Britain in 1940, it was manned by RCAF (including some American) officers, paid at Canadian pay rates, and its Canadian built Hurricanes were supplied by the Canadian government. In effect 1 RCAF Sqn. was a sovereign Canadian unit under the operational control of the RAF.[2][3] By contrast, the Polish and Czech manned squadrons were formed as RAF units and fell completely within the RAF's administrative and operational structure.
↑Note: The British date the battle from 10 July to 31 October 1940, which represented the most intense period of daylight bombing. Foreman 1988, p. 8. German historians usually place the beginning of the battle in mid-August 1940 and end it in May 1941, with the withdrawal of the bomber units in preparation for Operation Barbarossa, the campaign against the Soviet Union, which began on 22 June 1941. Foreman 1988, p. 8
↑Quoting Luftwaffe General Werner Kreipe: Terraine states the outcome as "decisive", Kreipe describes it as a strategic failure and turning point in the Second World War. Kreipe also states the "German Air Force was bled almost to death and suffered losses that could never be made good throughout the course of the war" and quotes Dr Klee: "The invasion and subjugation of Britain was made to depend on that battle, and its outcome therefore materially influenced the further course and fate of the war as a whole".[4]
↑Fighter Command's victory was decisive. Not only had it survived, but it also ended the battle stronger than it had ever been. On 6 July its operational strength stood at 1,259 pilots. On 2 November, the figure was 1,796, an increase of over 40%. It had also seriously mauled its assailant. In a lecture held in Berlin on 2 February 1944, the intelligence officer of KG 2, Hauptmann Otto Bechle, showed that from August to December 1940 German fighter strength declined by 30% and bomber strength by 25%.[6]
↑"The Battle was one of the great turning points in the Second World War—a defensive victory which saved the Island base and so, once Russia and the United States became involved, made future offensive victories possible."[7]
↑"As it was, the pragmatism of Dowding and his Fighter Command staff, the self-sacrifice of their pilots and the innovation of radar inflicted on Nazi Germany its first defeat. The legacy of that defeat would be long delayed in its effects, but the survival of an independent Britain which it assured was the event that most certainly determined the downfall of Hitler's Germany."[10]
↑"Given the ambiguous results of subsequent air campaigns against Germany. Japan, North Korea, and North Vietnam, it is probably fair to say that the Battle of Britain was the single most decisive air campaign in history."[11]
↑"A decisive battle has been defined as one in which a 'contrary event would have essentially varied the drama of the world in all its subsequent stages'. By this reckoning, the Battle of Britain was certainly decisive."[14]
↑Bungay quoting Drew Middleton in The Sky Suspended: In 1945 the Soviets asked Gerd von Rundstedt which battle of the war he considered to be most decisive. Expecting him to say "Stalingrad", he said "The Battle of Britain". The Soviets left immediately.[15]
↑754 single-seat fighters, 149 two-seat fighters, 560 bombers and 500 coastal aircraft. The RAF fighter strength given is for 0900 1 July 1940, while bomber strength is for 11 July 1940.[16]
↑Figures taken from Quartermaster General 6th Battalion returns on 10 August 1940. According to these, the Luftwaffe deployed 3,358 aircraft against Britain, of which 2,550 were serviceable. The force was made up by 934 single-seat fighters, 289 two-seat fighters, 1,481 medium bombers, 327 dive-bombers, 195 reconnaissance and 93 coastal aircraft, including unserviceable aircraft. The number of serviceable aircraft amounted to 805 single-seat fighters, 224 two-seat fighters, 998 medium bombers, 261 dive-bombers, 151 reconnaissance and 80 coastal aircraft.[17]
↑The Luftwaffe possessed 4,074 aircraft, but not all of these were deployed against Britain. The force was made up of 1,107 single-seat fighters, 357 two-seat fighters, 1,380 medium bombers, 428 dive-bombers, 569 reconnaissance and 233 coastal aircraft, including unserviceable aircraft. The Luftwaffe air strength given is from the Quartermaster General 6th Battalion numbers for 29 June 1940.[16]
↑1,023 fighters, 376 bombers and 148 aircraft from Coastal Command.[source?]
↑Overy 2001, p. 267 in Addison and Crang's The Burning Blue quotes A.J.P Taylor "a true air war, even if on a small scale and had decisive strategic results".