<P> 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 . </P>
<P> 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 . </P>
when did the battle of britain ww2 start
when did the battle of britain ww2 start
July 1940
July 1940