In 1964 it was announced that Director Ralph Nelson and Sidney Poitier, the Oscar-winning star and the director of Lilies of the Field (1963) would be re-teaming for "The Seventh File", an F.B.I. thriller. That project never came to pass, but Nelson and Poitier teamed up for this film.
James Garner's first western since leaving Maverick (1957) and Sidney Poitier's first theatrical western.
While preparing to lead his column in a night march against Chata, Scotty (Bill Travers) quotes a line of poetry, "Welcome to your gory bed, or to victory." This is from the patriotic song, Scots Wha Hae, which for centuries, had served as an unofficial national anthem of Scotland.
The opening credits scene and a brief snippet of Neal Hefti''s score turn up in Brian De Palma's Carrie (1976).
This was the first theatrical feature film credit as a Director of Photography for Charles F. Wheeler.