Battle of Britain » Diary
The crucial period of the battle was between 24 August and 15 September. Fighter Command came closest to losing when its vital sector airfields around London were attacked. The decisive turning point came on 7 September when the Luftwaffe switched its attention to the capital. This tactical blunder allowed Fighter Command to recover its strength rapidly to inflict, on 15 September, losses significant enough to show the Germans the battle could not be won.