“Brothers Under Fire” (*1/2 out of four) was a colorless action melodrama about a world-weary military captain (Kiefer Sutherland) whose squadron (Ashton Sanders, Fredy Yate, and others) are on leave for a wedding in Mexico but soon find themselves under siege from a bloodthirsty Mexican cartel (Omar Chaparro, Solly McLeod, and others) and have to fight to the death to survive. You can only imagine what Sam Peckinpah or Walter Hill would have done with material like this but Justin Chadwick instead turns this into a plodding bore. Sutherland walks through a token paycheck role.