As the campaign against the Soviet Union advanced eastward, the occupied territories would gradually be transferred from military to civilian administration. Hitler's final decision on its administration entailed the new eastern territories being divided into four Reichskommissariats in order to destroy Russia as a geographical entity by dividing it into as many different parts as possible. These new institutions were to be under the nominal supervision of Reichsleiter Alfred Rosenberg as head of the Reich Ministry for the Occupied Eastern Territories.