Character mistake: When LTJG Kaffee says "whatever happened to saluting an officer when he leaves the room?" It's well known that Kaffee doesn't know much about military protocols, but Marines and Sailors do not salute while uncovered, especially indoors. Army/Air Force maybe, but not the Navy or Marine Corps.
Revealing mistake: In the scene where Tom Cruise is yelling at/questioning Dawson at the jail in the witness room, immediately after Cruise gets up in Dawson's face and says, "I'm the only friend you've got," Cruise is supposed to simply turn and walk away. But you can see from the angle behind Dawson that Cruise' first step is a step down, indicating that he was on a pedestal of some sort to bring their heights closer together.
Deliberate mistake: The extras used in the scene when Danny gets assigned the case appear again as members of the jury. If Danny's colleagues were called as jury members for a trial all would have to declare a conflict of interest and be ineligible to hear the case. (00:09:30 - 01:03:25)
Continuity mistake: During Danny's drunken yelling scene he swoops a table ALMOST clear of its papers, meaning there are still a few papers messily left on the table. However, a few shots later, those papers are mysteriously missing. (01:47:20)
Continuity mistake: In the scene where Jo is telling Danny that she sent one of the prisoners some comic books (towards the beginning of the movie)he steps inside his car and the back window is halfway down. As he drives away it is completely up and as he pulls into the next scene, it is still up, while his driver side window remains down the whole time. (00:30:00 - 00:32:00)
Factual error: In the opening scene, during the overhead shots of the Marine band, the band members are out of step with the music. In military marching, the left foot ALWAYS falls on the downbeat of the music. In all other shots, the music is properly synchronised.
Continuity mistake: Just before Danny sits down after questioning Mr. R.C. McGuire, look at his shadows on his jacket. As Jack gets up, notice the sun shadow on his jacket, it's at an angle, but Danny didn't have one.
Continuity mistake: Part of Jack's opening statement has him walking towards the jurors with his left arm bent shot from behind the jurors. The next shot is from behind Jack, looking at the jury and his left arm is by his side.
Factual error: Lt. Caffey (Tom Cruise) wants the two marines to plead guilty and take a deal because he doesn't want the to "spend the rest of their lives in Leavenworth (prison)." The United States Disciplinary Barracks is indeed located in Leavenworth, Kansas. And the US Army and US Air Force send convicted felons there to do their time. However, Marines and members of the United States Navy are sent to Portsmouth Naval Prison in New Hampshire. It is run by the Marines.Nimzoman
Other mistake: When Danny, Sam and Jo arrive on Guantanamo Bay Naval base, they are met by the driver who recommends they put on camouflage jackets so their dress whites won't be spotted by Cuban snipers distinguishing them as high ranking targets.They comply and as you see them drive away, right there on the top of their heads, bright white dress hats can be seen clear as day. While it's against regulations to remove hats outside, it's also against regulations to cover dress whites, so a half-assed measure is an odd choice.
Revealing mistake: In one scene, Tom Cruise is walking along the sidewalk with Kevin Pollak (who is pushing a pram). The camera, which obviously is moving backwards on a dolly, is in front of them. As the men walk past some bushes, watch the branch on the right-hand side. As it comes into view, we see it spring back and shake for a bit. Evidently, the camera dolly snagged it on the way past.
Continuity mistake: When Jack Ross (Kevin Bacon) calls his first witness to the stand, he steps over to the podium between himself and the defense counsel, but in the wide shot showing the witness walking across the courtroom, he is back at his table. Then in the following close-up he is once again at the podium.
Continuity mistake: During Danny's examination of Lt. Kendrick on the witness stand, he leans up against his courtroom table, shot from the back, in front of the microphone which is straight on, on the table. The next shot, from the front, shows the mic to the left of him and on an angle.
Factual error: The film's presentation of Guantanamo Bay seems unrealistic. In an attempt to make Jessep seem autocratic and akin to a dictator, they show a scene of Jessep and Danny meeting outdoors. In the background, there is a colonial-era type mansion in immaculate condition. There are no such buildings on the Naval base at Guantanamo Bay.
Character mistake: During the trial, Danny says Lt. Col. Markinson shot himself in the mouth with a .45, but in the suicide scene, Markinson's gun is a Beretta 9mm, the standard-issue U.S. Military sidearm.