Revealing: When John Wayne and Geraldine Page's characters first meet the lead cavalry man and 'Buffalo Baker', you can see in the distance a radio tower on top of the hill/mountain.

Factual error: When Hondo is introduced to the young cavalry lieutenant, Buffalo Baker remarks that it is 1870. Later, when the survivors return to the ranch, they claim to have killed Victorio; however, Victorio was actually killed in 1880 in Mexico, by Mexican troops.

Visible crew/equipment: In the scene where Hondo is being chased by the Indians after killing Lowe and gets knocked off his horse, when he jumps back onto the horse, look in front of the animal; you can see the white shirt of the man holding the horse.

Factual error: Although Hondo's story takes place in 1869/70, he packs a Colt Peacemaker, which was not manufactured until 1873.