What was the blitz in WW2?

(when the Germans bombed England) WHO EVER WROTE THAT LET ME IMPROVE.#

The Blitz was the BOMBING CAMPAIGN carried out on British cities and towns by the Germans during ww2. War was declared on September 3, 1939, but the first few months were called the 'Phoney War' as little seemed to happen. The retreat of the British forces from Dunkirk in June 1940 was followed by the intense BATTLE OF BRITAIN fought in skies over southern Britain until September 1940. The Blitz then began, and lasted until May 1941