The film Valkyrie, in my opinion, was surprisingly historically accurate. With the climax of the film being the assassination attempt own Hitler in 1944, the film was quite moving with powerful performances by lead actors and actresses, who did well to portray the severity of their actions. For example, the wife of the protagonist (Col. Claus von Stauffenberg) hardly says anything during the movie, but you can see the worry she has for her husband. Tom Cruise, who plays Col. Stauffenberg, does an excellent job playing a stoic military man with incredibly strong resolve, one with undoubted faith to his beloved Fatherland.
Relating to GR-331, this movie was as accurate as can be. From actual quotes from General Tresckow to Stauffenberg’s aid jumping in front of the firing squad, this movie achieved its goal of informing the public that the first country that the Nazi’s invaded was in fact Germany, and that not all citizens were willing to follow Hitler blindly.