I heard that the D-Day landing scene in that movie was praised for its accuracy and is as close as it gets to the real deal...nevertheless the actual footage from the landings and their aftermath does not really resemble the extremely graphic nature of that scene. For example there is a archive video showing soliders hardly struggle to get of the boat and most pictures of the beach don't show near as much bodies and death in general as the movie.
Im not trying to say that the landing was much easier than portrayed because I do believe that it was in fact as bad as in the movie or even worse but im still wondering why the footage doesn't show that.
And also I hope you don't mind if some of the spelling and sentences are off. Im not a native english speaker so there might be some mistakes and stuff that doesn't really make sence.
This older answer should be of interest.