Major-General Keller was popular with his troops, who appreciated his manners and outspoken language; however, a drinking problem and several breaches of security measures before D-Day cost him the support of both his superior officers and his own staff.
Generalmajor Keller var populær blandt tropperne, som satte pris på hans manerer og klare tale; men problemer med drikkeri og adskillige brud på sikkerheden inden D-dag betød at han mistede støtten fra såvel sine overordnede som sin stab.