At about the 1:30:00 mark the shot of an Indian in a red shirt and pink blanket being shot off his horse is used twice.
The apparel and war bonnets worn by the Apaches look like generic movie props and don't seem authentic for the time and place.
When Lt. Hazard is negotiating with War Eagle there is no interpreter while Hazard is speaking English only and War Eagle is speaking Apache only.
Lt. Hazard's patrol catches up with the Apaches who ambushed Mainwarring and stole the horses. Without any discussion or planning, Hazard uses a couple of hand signals and starts the attack the steal the horses back triggering a chase by the Apaches. Then improbably Hazard suddenly stops and has the scout set a fire to the sage and scrub to block the pursuing Apaches. The sequence of events is illogical and reckless.
During the major battle, Lt. Hazard's men get up on a cliff top to fire down on the hostiles. The cliff is way too high and far away for their rifle fire to be effective.
At Fort Delivery, there are never any troops on watch on the walls and ramparts. This becomes clear when General Quaint and his command show up and set up camp outside the fort without being seen. Even the open gates are not manned in many shots.
During the brawl that erupts between the troopers and Seely Jone's women it is obvious that several of the 'women' are male stunt actors with wigs.
Sgt. Kroger gathers his men and runs away when the Apaches attack the wood cutting crew leaving Lt. Hazard and the others behind. Abandoning his commanding officer on the field of action should have resulted in formal discipline, especially as Kroger and Hazard have already had several confrontations.
Lt. Mainwaring, who is acting commander when Lt. Hazard arrives, proceeds to lead a troop out to bring the spare mounts from another fort. He turns the command over to Capt. Gray. Either Capt. Gray should have already been in charge or as acting commander Mainwarring should have assigned Hazard to lead the mission to fetch the horses.
When Lt. Hazard is on patrol, his Apache scout is riding side-by-side with him at the front of the troop. The scouts, Apache or regular troopers, would have been well out in front of the troop doing their job as scouts.