In late-1944 Hahn was promoted to the rank of SS-Standartenfuher (colonel) and reassigned to the Western Front and stationed in the Rhenish town of Cochem, where he served as commander of "Einsatzgruppe L" during the Battle of the Bulge.
1944 Hahn was promoted to the rank of SS-Standartenfuher (colonel). This was in late.-1944 Hahn was reassigned to the Western Front. This was in late. He served as commander of "Einsatzgruppe L" during the Battle of the Bulge.-1944 Hahn was stationed in the Rhenish town of Cochem. This was in late. He served as commander of "Einsatzgruppe L" during the Battle of the Bulge.