A Thunder of Drums (1961) on Netflix

The trials and tribulations of bitter veteran Captain Maddocks and argumentative rookie Lieutenant McQuade at a cavalry desert outpost.

Captain Maddocks will never be promoted beyond Captain because of a mistake that he made in the past. Lt. McQuade is a green rookie who is now under the command of the tough Captain and he does not seem to be able to do anything right. Lt. McQuade also has trouble with Tracey, but it will be the renegade Indians that will test him and teach him the importance of following orders.

—Tony Fontana <tony.fontana@spacebbs.com>

A cavalry outpost in a desert country, where both Comanches and Apaches make frightening enemies, is the domain of bitter Captain Stephen Maddocks, who will never be promoted because of a mistake he once made and has to do with half staff. From arrival Lieutenant Curtis McQuade, Maddock's former general's inexperienced son, finds his veteran commander tough and difficult, but eminently experienced and always sadly right in Indian matters. Furthermore McQuade gets into a dispute with a fellow officer, whom he outranks, rivaling for Lt. Thomas Gresham's lady, Tracey Hamilton who was his former girlfriend. Once Maddocks has no other choice than use McQuade against the Indian danger, desert patrol life proves to be a hard school but Curtis is a good pupil...

—KGF Vissers