Kọ itẹsiwaju fun paragirafi yii - Lẹhin opin ogun, Koehl ṣe orukọ fun ara rẹ fun iwadi rẹ lori National Socialism, ni pataki ti awọn iwadi lori Heinrich Himmler bi Reich Commissioner fun Iṣọkan ti Orilẹ-ede German, bakanna bi iṣẹ aṣáájú lori Nazi German lakoko Iṣẹ-ṣiṣe ti Poland (1939<unk>1945)
ó ṣe tán. Koehl lo gbolohun naa "neofeudalism" lati ṣe apejuwe ijọba National Socialist, o si pari iroyin kan ti itan SS ni ọdun 1983.