Brotherhood of Death (1976)

Downtown Distribution Company
Directed by Bill Berry
My rating: 2.5 stars out of 4
IMDb
(YouTube)

Three black men are harassed in their racist southern town. They join the Army and learn combat skills while on duty in Vietnam. Back home, the harassment continues, leading to an all-out war with the Ku Klux Klan during which their combat skills are put to good use. Blaxploitation classic pushes all the right buttons, and manages to work in social issues which sadly are still relevant today.