Red River (1948 film)

The film's supporting cast features Walter Brennan, Joanne Dru, Coleen Gray, Harry Carey, John Ireland, Hank Worden, Noah Beery Jr., Harry Carey Jr. and Paul Fix. Borden Chase and Charles Schnee wrote the screenplay, based on Chase's original story (which was first serialized in The Saturday Evening Post in 1946 as ``Blazing Guns on the Chisholm Trail'').

Question: is the movie red river based on a true story
Answer: no