Chuck Hicks (Battling Bruno) was Heavyweight boxing champ of the U.S. Navy's 6th Fleet and later boxed professionally under the name "Chuck Daley".
Bruno's rank is UnterOffizier, the equivalent of Sergeant.
Chuck Hicks actually played a Stalag 13 guard many times but this was the first time he ever received a credit.
The title is derived from the English expression "The bigger they are, the harder they fall" concerning advice to an underdog against a stronger opponent or daunting situation.