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. Parts of the screenplay bear little relation to the novel, although the portion in which a woman seduces a North Vietnamese communist general and sets him up to be kidnapped by Americans is from the book.

War film is a film genre concerned with warfare, typically about naval, air, or land battles, with combat scenes central to the drama. It has been strongly associated with the 20th century. The fateful nature of battle scenes means that war films often end with them. Themes explored include combat, survival and escape, camaraderie between soldiers, sacrifice, the futility and inhumanity of battle, the effects of war on society, and the moral and human issues raised by war. War films are often categorized by their milieu, such as the Korean War; the most popular subjects are the Second World War and the American Civil War. The stories told may be fiction, historical drama, or biographical. Critics have noted similarities between the Western and the war film.