Opinion on targeting steadily shifted as the war progressed, and by November 1940, the view was developing that the civilian population of Germany was a legitimate target in "total war". By June 1941, RAF thinking had been reversed from seeing any civilian casualties as collateral damage when attacking a military target, to deliberately targeting civilians in an attempt to destroy their morale. This was expected to reduce industrial production and therefore hinder the German war effort. The target was no longer factories, but the people who worked in them and lived in the surrounding area. This became known as "area bombing". This change was not driven by the inaccuracy of bombing at this stage, but by studying which parts of the German Blitz on Britain had had most effect.