Fun Fact!
In the film Hostiles (2017), Christian Bale’s character (Capt. Joseph J. Blocker) wears a different colored campaign hat than the rest of the soldiers in the party.

(Promotional image for Captain Joseph Blocker)
This is because the movie takes place in 1892, and the U.S Army only began issuing the beige/brown hats to recruits in 1883, however Blocker is a veteran of the 1876 Indian-American wars, when the black hats were still issued to cavalry troopers

(Lt. Rudy Kidder (Jesse Plemons) )

U.S Cavalry Troops in 1876 and 1875 respectively.

A member of the Tenth U.S. Cavalry poses with three Apache Scouts, Fort Whipple, Arizona, circa 1885.

U.S Cavalry Uniform circa 1890 – 1896