The racial subtext, was it necessary?
I like this movie a lot and it has stood the test of time well but what almost ruins the entire film was near the end when they both sit down facing each other at the com and Hackman brings up the horse discussion from earlier. Implying that the horses are the best because they are white, it just felt like it was a deciding factor in his hostility towards Washington's character, and therefor undermined his entire standing as Captain.
Don't be afraid to dream a little bigger darling...