Harvey forgot that a firing cannon has a recoil; during the scene in which, as Travis, he fires in response to a surrender demand, the cannon came down on his foot, breaking it — he didn't scream in pain until after Wayne had called "Cut!". Wayne praised his professionalism.
Filming ended on 15 December. A total of 560,000 feet of film was produced for 566 scenes. Despite the scope of the filming, it lasted only 3 weeks longer than scheduled. By the end of development, the film had been edited to three hours and 13 minutes