Check out the Blu-Ray DVD version, which has both interviews, and cast interviews about the advice they got. Including Pitt, whose ego I don't think deals real well with being told how it really was.
I’ll have to check it out.
I heard some interesting memories from my dad over the years. A bridge in Corsica where an obstinate farmer with a donkey cart was blocking a military convey in a hurry. The lead truck shoved him over the side when he wouldn’t move. The USS Nevada just offshore of the French coast firing broadsides in a prolonged gun fight with a German fort near Toulon harbor. The sky filled horizon to horizon with American bombers headed for Germany. Trying to get a bead on an incoming Luftwaffe plane with their 90mm gun only to realize it was moving too fast- their first encounter with a jet. That’s just a few. It was mostly later in life that he spoke of his memories of WWII. I learned to prod him into telling me what he remembered.