Dunkirk (2017)

Most of director Christopher Nolan’s films fall fairly neatly into the genres their marketing campaigns sold them as. His three Batman movies are superhero movies through-and-through, “Inception” and “Interstellar” are science-fiction, “The Prestige” and “Memento” are thrillers, and so on. “Dunkirk” was more or less sold as a war film. It’s certainly set during a…