When Sgt. Quincannon (Victor McLaglen) is addressing the troops and warning them to "watch them words," he asks who owns a dog, without receiving an answer. He concludes, "Nice dog! Irish setter!" The scene was improvised on the spot by director John Ford. The dog was an unnamed Navajo pet that had fallen asleep during the setup. Multiple takes were required because McLaglen kept blowing the line, calling the dog a "cocker spaniel."
Based on the paintings and illustrations of Frederic Remington, the artist renowned for his nostalgic packaging of the bygone "real" West for an urban public.
Sergant Tyree's horse is named "Laddie".
The song "She Wore a Yellow Ribbon" is still to this day the official anthem of the United States Cavalry/Armor.
The exterior shots of Capt. Brittle quarters and the building where Major Mac Allshard, Commanding Officer Fort Starke has his HQ are still standing and in Monument Valley itself near to the town of Kanab. The HQ building is now a museum and both are open to the public.