Reason No. 3: Status of Nazi-controlled territories

This map...

...distinguishes on the German side between the Reich proper (shown in dark brown), areas which are permanently under German occupation (shown in medium brown) and those puppet regimes and voluntary allies which, at least in theory, are sovereign states. Countries of the last category are mostly shown in beige. The CSA, Vichy-France, Italy, Spain and Turkey have their own colors. As a permanently occupied country, the remaining USA have the same status like territories painted in medium brown.