 During the course of filming, Lee Marvin and Perry Lang (qv) got  into an argument. While filming the scene where they come to  Crucifix Hill (where the Nazis are planning an ambush), Lang kept  waving and gesturing his arms while he spoke. After the scene was  finished, Lee Marvin growled at Lang "What the fuck was all that  crap about?" To which Perry Lang cursed out Marvin. According to the  other actors in the Reconstruction Documentary, neither Marvin nor  Lang spoke to one another for the next week. Finally, Marvin began  talking to Lang and treated him with respect for standing up to him.