At the beginning of September Britain launched air attacks on some of Germanyís industrial areas - and Berlin itself. The air raids on Germany are said to have angered Hitler so much that on 7th September he ordered the Luftwaffe to bomb British cities. Whatever the reason, the Luftwaffe changed tactics and shifted their attacks away from Britainís air defence installations. Under attack instead were major population centres, especially London and its docks. It was the beginning of the blitz.