I think the switching from country to country keeps it moving at a fast pace. I agree with some modern speak that wouldn't be used back then, but a lot of things they have got right, such as the aircraft, tanks and planes although obviously computer generated.
In the old war films the tanks looked nothing like those from the period.
It's the way war films are made today such as Dunkirk and All Quiet on the Western Front, and they are much more realistic.
Much better than when they used to say, Old Harry's bought it. Has he? Poor old Harry. Dashed hard luck what?