Dances with Wolves (1990)

A Union Lieutenant during the Civil War gets send to a remote outpost and soon comes across a lonely wolf and a group of Sioux Indians. He becomes one of them over time and when another group of troops comes along he is found and is seen as a traitor. He is taken into custody but soon escapes by the help of his Indian friends.

I give this movie a 5 out of 5.

Starring Kevin Costner (Hidden Figures, Criminal, Draft Day, Man of Steel) as Lieutenant Dunbar, Mary McDonnell (Battlestar Galactica, Donnie Darko, Margin Call, Major Crimes) as Stands With a Fast, Graham Greene (The Green Mile, Wind River, Skins, Antlers) as Kicking Bird, Rodney A. Grant (Ghosts of Mars, Wild Wild West, The Doors, Dark Blood) as Wind In His Hair, the late Floyd 'Red Crow' Westerman [1936-2007] (Hidalgo, The Doors, Swing Vote, DreamKeeper) as Ten Bears, Tantoo Cardinal (Wind River, Legends of the Fall, Shouting Secrets, Ghostkiller) as Black Shawl, the late Robert Pastorelli [1954-2004]  (Eraser, Striking Distance, Beverly Hills Cop II, Be Cool) as Timmons, the late Charles Rocket [1949-2005] (Dumb and Dumber, Short Cuts, Hocus Pocus, Shade) as Lietenant Elgin, the late Maury Chaykin [1949-2010] (My Cousin Vinny, Mousehunt, WarGames, Casino Jack) as Major Fambrough, the late Jimmy Herman [1940-2013] (Reindeer Games, North of 60, Hank Williams First Nation, Supernatural) as Stone Calf, Nathan Lee Chasing His Horse (Into the West, The Red Man' s View, DreamKeeper, The Broken Chain) as Smiles A Lot, Michael Spears (Into the West, Yellow Rock, Z Nation, The Activist) as Otter, introducing Jason R. Lone Hill as Worm, Tony Pierce (Near Dark, The Bodyguard, Tales from the Crypt, Haraka) as Spivey and introducing the late Doris Leader Charge [1930-2001] as Pretty Shield.

https://www.imdb.com/title/tt0099348/