I look at those movies like most movies, its fiction.
They will never be able to catch the sceneries and the horrors of those wars as they where experienced by our fathers, mothers, grandfathers and grandmothers.
It is all twisted and bent to make a plot and a great view. Nothing else is the intention.
I cant imagine anyone taking those movies for historical documentary showing any reality.
Enjoy a good (or not) movie but dont make a historical event or witness out of it.
About the sound:
https://www.youtube.com/watch?v=LVWTQcZbLgY