For a long time now, my wife has refused to watch a war movie with me. This is because I cannot stop grinding my teeth with annoyance at major historical mistakes, or harrumphing over errors of period detail. She only made an exception when Valkyrie came out, with Tom Cruise playing Count Claus Schenk von Stauffenberg. Such a folly of miscasting was bound to be a hoot, and we were not disappointed, especially when Cruise saluted in that downward cutaway style as if he were still in Top Gun. But I was soon grinding away again when the director and screenwriter felt compelled to improve on history, by making it look as if the 20 July plot to blow up Hitler had still very nearly succeeded.

I despair at the way American and British movie-makers feel they have every right to play fast and loose with the facts, yet have the arrogance to imply that their version is as good as the truth. Continental film-makers are on the whole far more scrupulous. The German film Downfall, about Hitler’s last days in the bunker, respected historical events and recreated them accurately.

In my view, the greatest war movie ever made is The 317th Platoon, a French film from 1965 set during the country’s first Indochina war. This was the original “platoon movie”, whose format later directors followed but failed to match in its portrayal of characters and their interaction, to say nothing of the moral choices and the corruption of combat. It is followed closely by 1966’s The Battle of Algiers, set during the Algerian war of independence. This was one of the first war films to adopt a quasi-documentary approach, and tackle the moral quagmire of torture justified by the need to save lives.

More recent imitators lack all intellectual honesty. They throw dates and place names on to the screen as if what you are about to see is a faithful reproduction of events, when they are simply trying to pass off their fiction as authentic. This is basically a marketing ploy that has developed over the last 20 years or so. Unfortunately, fake authenticity sells. People are more likely to want to see something they think is very close to the truth, so they can feel they are learning as well as being entertained. In a post-literate society, the moving image is king, and most people’s knowledge of history is regrettably based more on cinematic fiction than archival fact. ...