Christopher Nolan’s breathtaking film ‘Dunkirk’ was released to much critical fanfare in 2017, praised for its visual storytelling and realism.

However, according to one of the Second World War’s greatest historians, there are several huge mistakes that filmmakers have gotten away with.

In discussing the film starring Harry Styles, which he worked on in an advisory capacity, James Holland identifies the small but crucial details overlooked by the movie’s creators.

In one scene, where…