Several western films have emerged showcasing well-known performers—one representing blue, another grey—forced into a partnership following the conclusion of the American Civil War. This particular film casts Charlton Heston as the central figure leading a group assigned to subdue Apache raiders originating from Mexico. When I refer to a “group,” it’s more accurately described as an unlikely collection of undisciplined individuals, and only the resolve of Heston and his Confederate counterpart, "Tyreen" (Richard Harris), will enable them to cross the border and confront their powerful adversary. It turns out this entire operation is also unlawful. What follows is a fairly captivating clash between the personalities of Harris and Heston, supported by a solid cast including James Coburn, Slim Pickens, and Jim Hutton, resulting in an adventure film structured around episodes with minimal suspense but ample action sequences, clever exchanges, and a roster of prominent actors. The movie’s length does feel noticeable, as it requires some time to gain momentum; however, once it does, there's enough to maintain interest. It isn't exceptional, nor is this the finest work from anyone involved, yet the visuals are impressive, and the narrative itself holds merit.

Source on TMDB