The Green Berets is a 1968 American war film directed by John Wayne and Ray Kellogg, and starring Wayne, David Janssen and Jim Hutton, based on the 1965 novel by Robin Moore. Much of the film was shot in the summer of 1967. From Wikipedia
The Alex Garland and Ray Mendoza film has been lauded for its authenticity by veterans but faces criticism for its narrow focus on violence.