I just got done watching Theirs is the Glory. Wow -- an excellent movie. It's about the stand at Arnhem. Filmed in 1946, it uses the real location, mixes in footage from the fight, and -- amazingly -- everyone in it is a veteran of the actual battle! It even has prominent Dutch civilians in it (Father Dyker and Kate ter Horst, for example, playing themselves). You would think that 1946 effects would look dated by modern standards, but not so -- they are excellent and very realistic. Of course, there are things like real German tanks getting really blown up in it. When there are explosions, you can tell that the reactions are not an act.
What an amazing film.
It's available via Watch Instantly from Netflix.