Battle of Britain

The Battle of Britain, also known as the Air Battle for England (German: *die Luftschlacht um England*), was a military campaign of the Second World War, in which the Royal Air Force (RAF) and the Fleet Air Arm (FAA) of the Royal Navy 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.

The primary objective of the German forces was to compel Britain to agree to a negotiated peace settlement. In July 1940, the air and sea blockade began, with the Luftwaffe mainly targeting coastal-shipping convoys, as well as ports and shipping centres such as Portsmouth. On 1 August, the Luftwaffe was directed to achieve air superiority over the RAF, with the aim of incapacitating RAF Fighter Command; 12 days later, it shifted the attacks to RAF airfields and infrastructure. As the battle progressed, the Luftwaffe also targeted factories involved in aircraft production and strategic infrastructure. Eventually, it employed terror bombing on areas of political significance and on civilians.

In November 1939, the OKW reviewed the potential for an air- and seaborne invasion of Britain: the Kriegsmarine (German Navy) was faced with the threat the Royal Navy's larger Home Fleet posed to a crossing of the English Channel, and together with the German Army viewed control of airspace as a necessary precondition. The German navy thought air superiority alone was insufficient; the German naval staff had already produced a study (in 1939) on the possibility of an invasion of Britain and concluded that it also required naval superiority. The Luftwaffe said invasion could only be "the final act in an already victorious war."

Luftwaffe's primary bombers were the Heinkel He 111, Dornier Do 17, and Junkers Ju 88 for level bombing at medium to high altitudes, and the Junkers Ju 87 *Stuka* for dive-bombing tactics. The He 111 was used in greater numbers than the others during the conflict, and was better known, partly due to its distinctive wing shape. Each level bomber also had a few reconnaissance versions accompanying them that were used during the battle.

Aftermath

The Battle of Britain marked the first major defeat of Germany's military forces, with air superiority seen as the key to victory. Pre-war theories had led to exaggerated fears of strategic bombing, and UK public opinion was buoyed by coming through the ordeal. For the RAF, Fighter Command had achieved a great victory in successfully carrying out Sir Thomas Inskip's 1937 air policy of preventing the Germans from knocking Britain out of the war.

The battle also significantly shifted American opinion. During the battle, many Americans accepted the view promoted by Joseph Kennedy, the American ambassador in London, who believed that the United Kingdom could not survive. Roosevelt wanted a second opinion, and sent William "Wild Bill" Donovan on a brief visit to the UK; he became convinced the UK would survive and should be supported in every possible way. Before the end of the year, American journalist Ralph Ingersoll, after returning from Britain, published a book concluding that "Adolf Hitler met his first defeat in eight years" in what might "go down in history as a battle as important as Waterloo or Gettysburg". The turning point was when the Germans reduced the intensity of the Blitz after 15 September. According to Ingersoll, "[a] majority of responsible British officers who fought through this battle believe that if Hitler and Göring had had the courage and the resources to lose 200 planes a day for the next five days, nothing could have saved London"; instead, "[the Luftwaffe's] morale in combat is definitely broken, and the RAF has been gaining in strength each week."