Luftwaffe began bombing London

The Luftwaffe altered its strategy from 7 September 1940 and began to bomb London, at first in daylight raids and then, after their losses became unacceptably high, at night. The raids were soon extended to provincial cities such as the notorious attack on Coventry on 14 November. The Blitz was especially intensive through October and November. It can be said to have continued for eight months, by which time Hitler was ready to launch Operation Barbarossa, the invasion of the USSR. The Luftwaffe failed its objective of reducing British war production, which actually increased. Churchill's morale during the Blitz was generally high and he told his private secretary John Colville in November that he thought the threat of invasion was passed. He was confident that Great Britain could hold its own, given the increase in output, but was realistic about its chances of actually winning the war without American intervention.