In 1946 he was handed over to the Americans and took part in the U.S. Army Historical Division project and wrote a monograph on the mobile warfare aspect of the Ardennes Offensive.
In 1946 he was handed over to the Americans and imprisoned in Germany. While held at the latter camp, he took part in the U.S. Army Historical Division project and wrote a monograph on the mobile warfare aspect of the Ardennes Offensive.