 The bombing prevented increases in German production and caused resources to be diverted from offensive to defensive purposes but German civilian morale did not break.The Berlin defences and essential services were maintained and war production in greater Berlin did not fall.In 2006, Adam Tooze, an economic historian, wrote that the British bombing of Hamburg in July 1943 appeared to vindicate the hopes of the British leaders in Bomber Command, that it had become a decisive weapon and that the theory of strategic bombing had been vindicated.