The work of two people stand out here: the actor Christian Bale and the cinematographer Masanobu Takayanagi (Silver Linings Playbook, Warrior, The Grey, Spotlight, etc.)
Bale plays an Army Captain who agrees to escort a dying Cheyenne war chief and his family through treacherous lands. The general and the chief, being old enemies, embark on a journey where their conflict seems the least of their worries. The cinematography is lush and reminiscent of the classics of the Western genre. It is a harshly stunning film you should watch.