Dunkirk (2017)

Factual error: When the returning soldiers are on the train at the end of the film, it's an open plan post-war British Rail Mark I type, which where built from around 1950. Also the blue upholstery on the seats looks to be the corporate blue introduced by British Rail in the 1960s, used by the preserved railway owning the stock, and not what would have featured in Southern Railway carriages of the time. The carriages also have horizontally-sliding windows, which are far more contemporary than wartime trains, which had windows with a much larger vertical opening, held in place by a leather strap.

Commander Bolton: Well, we'll know in six hours' time.
Colonel Winnant: I thought the tides are every three.
Commander Bolton: Then it's a good that you're Army and I'm Navy, isn't it?

Trivia: In reality, Adolf Hitler ordered his commanders and troops to stand down and allow Allied forces to escape at Dunkirk. The German General von Blumentritt is quoted as saying "He (Hitler) then astonished us by speaking with admiration of the British Empire, of the necessity for its existence, and of the civilisation that Britain had brought into the world...He said that all he wanted from Britain was that she should acknowledge Germany's position on the Continent." But the exact reason for the order remains unknown.

Charles Austin Miller

Question: A few minutes into the movie you see English troops all lined-up on the beach with no obvious means of evacuation. That leaves them very exposed to German gunfire and aerial attack. It would seem that the English soldiers would stay off the beach until actually called-up for evacuation. Not to mention the obvious requirement that some troops would have to stay off the beach to defend the evacuation area. How realistic are those scenes?