Written by the screenwriter from Wyoming named Guy Walter Trosper. The exact script of the film, here: (https://www.scripts.com/script/devil%27s_doorway_6828). Produced by Nicholas Nayfack, directed by ANTHONY MANN. Filmed in Colorado. Many of the references on the history of Wyoming's declaration as an independent State or Territory, on the course of the Pacific Union Railroad and the Overland Trail, the resistance of the Indians, the Civil War and the South Rebels are omitted in the translations of the film. The subtitles of the film are obviously censored -in every language- due to its uncompromising, historical theme about South Rebels and Indian gods or legends (so, a major improvement of the subtitles to follow the exact script should be prioritized). Alternative titles: THE GATE OF HELL/THE ROAD TO PERDITION/BROKEN LANCE/THE LAST OF THE SLAVES.