The Magnificent Seven (1960)
Dir. John Sturges
Hollywood swapped east for west, B+W for colour and katanas for guns in their reworking of Akira Kurosawa's Seven Samurai (1954).
Despite being pushed for time behind the scenes they managed to come up trumps in every way with the first film in the series.
The John Ford-esque clique; the men beholden to nothing but their own moral code; recurring good and bad guy themes (by Elmer Bernstein); and even the timely split between the recruit, preparation and battle phases are all instantly recognisable pre-existing elements to fans of both the Western and Chanbara genre but it's still indelibly iconic in its own way.