The history of the organisation can be divided into three phases. From 1933 to 1938, before the organization existed, Fritz Todt's primary office was that of the General Inspector of German Roadways (Generalinspektor für das deutsche Straßenwesen) and his primary responsibility, the construction of the Autobahn network. He was able to draw on "conscripted" (i.e. compulsory) labour, from within Germany, through the Reich Labour Service (Reichsarbeitsdienst, RAD).[citation needed]