Crew or equipment visible: During the opening titles, as refugees file past the camera, its shadow is visible during the whole shot.
Anachronisms: At the end of the film, as everyone rides slowly toward the camera, a red pickup truck enters from the right and casually drives alongside the river in the background.
Anachronisms: The cavalry uniforms are Indian Wars vintage, not Civil War uniforms.
Anachronisms: After the Civil War (1861-65) when the cowboys are around the campfire, Webster talks of sending a letter and that it could go Pony Express. The Pony Express dissolved in October of 1861. It also did not go into South Texas where the cowboys apparently where traveling.
Anachronisms: In the opening scene, Union soldiers are marching past the screen carrying a flag with 48 stars on it. During the Civil War the Union flag only had either 34 or 35 stars.
Anachronisms: The movie is set in 1865. The Confederates are using 1873 Springfield Trapdoor rifles, The Mexican bandit leader is using a 1873 Trapdoor Carbine, John Wayne is using his 1873 Colt Peacemaker and an 1892 Winchester 30-30 rifle.
Factual errors: Looking closely, you can see the rifle of the tenth member of the firing squad. Also you can plainly see his shadow on the ground at a 10 o' clock position. There are several other shots that confirm the number.
Anachronisms: At the end of the last close up shot of John Wayne in the movie, a green pickup truck can be seen entering the frame in the background on the opposite side of the river.
Factual errors: When Mrs. Langdon wants to break up the brawl that broke out in the Fourth of July celebration, she grabs a rifle and fires three shots into the air in quick succession. The rifle she used was a single-shot carbine, which requires that the shooter manually eject the shell and reload between each shot. It would have been impossible to fire three shots as quickly as she did without ejecting and reloading.