On 20 August 1940, Winston Churchill gave one of his most famous speeches to the House of Commons. The youtube video below gives a small section of the speech, including the famous line - 'Never in the field of human conflict was so much owed by so many to so few.'
The recording below was made after the war, along with several of Churchill's other famous wartime speeches.
The great air battle which has been in progress over this Island for the last few weeks has recently attained a high intensity. It is too soon to attempt to assign limits either to its scale or to its duration. We must certainly expect that greater efforts will be made by the enemy than any he has so far put forth. Hostile air fields are still being developed in France and the Low Countries, and the movement of squadrons and material for attacking us is still proceeding.
It is quite plain that Herr Hitler could not admit defeat in his air attack on Great Britain without sustaining most serious injury. If, after all his boastings and blood-curdling threats and lurid accounts trumpeted round the world of the damage he has inflicted, of the vast numbers of our Air Force he has shot down, so he says, with so little loss to himself; if after tales of the panic-stricken British crushed in their holes cursing the plutocratic Parliament which has led them to such a plight; if after all this his whole air onslaught were forced after a while tamely to peter out, the Fuehrer's reputation for veracity of statement might be seriously impugned. We may be sure, therefore, that he will continue as long as he has the strength to do so, and as long as any preoccupations he may have in respect of the Russian Air Force allow him to do so.
On the other hand, the conditions and course of the fighting have so far been favourable to us. I told the House two months ago that whereas in France our fighter aircraft were wont to inflict a loss of two or three to one upon the Germans, and in the fighting at Dunkirk, which was a kind of no-man's-land, a loss of about three or four to one, we expected that in an attack on this Island we should achieve a larger ratio. This has certainly come true. It must also be remembered that all the enemy machines and pilots which are shot down over our Island, or over the seas which surround it, are either destroyed or captured; whereas a considerable proportion of our machines, and also of our pilots, are saved, and soon again in many cases come into action.
The gratitude of every home in our Island, in our Empire, and indeed throughout the world, except in the abodes of the guilty, goes out to the British airmen who, undaunted by odds, unwearied in their constant challenge and mortal danger, are turning the tide of the world war by their prowess and by their devotion. Never in the field of human conflict was so much owed by so many to so few.
If you would like to read the whole speech take a look at The Churchill Centre.