"New Mexico" is a definite western of the 1950s. Up until the 1950s, most westerns either never mentioned the natives or they were shown as mindless savages. However, in the 50s, filmmakers began showing them more sympathetically...no longer killers, but people.
The film begins with a prologue with President Lincoln visiting the west in 1860 (I am pretty sure this never occurred) and affirming his commitment to the natives. Then the film skips ahead a few years.... Lincoln is dead* and it's back to the same place out west. However, instead of honoring the President's commitments, the new cavalry leader deliberately stirs up the Indians by his insensitive actions. Soon, the natives attack...killing him and leaving Captain Hunt (Lew Ayers) in charge. Hunt is determined to find the Indian leader and come up with some compromise....but as the story progresses it's obvious this is not gonna happen.
This is a decent film but I am sure some will hate the ending, which is very dark and unusual. I didn't mind it, as I must have seen 302,003 other westerns over the years....and at least this made "New Mexico" different. Not a brilliant film....but worth your time....as well as being unusual since you'd never expect Lew Ayers in a western.
*To show that Lincoln was killed, you see a closeup of a firing revolver. While mistakes with guns are common, I was surprised with this one because John Wilkes Booth's weapon was a tiny Derringer....which looks absolutely nothing like a revolver. A bit sloppy...but no major deal.