Particularly garbage like the Deer Hunter, Apocalypse Now, Full Metal Jacket, Platoon and other such cartoons.
Just watched an idiotic WW I movie called The Somme in which nobody gets dirty, gunfire is somewhat rare and at the end of an interminable hour and a half of chattered gibberish, the launch a charge across a pretty green field and one by one, they fall gracefully and bloodlessly to apparently one machinegun. No budget, apparently.
I hate war movies because they are never produced or directed by actual veterans (Oliver Stone is as much a veteran as John Kerry). The usual technical adviser for such tripe is Dale Dye, a former Marine PAO who wouldn't have the slightest idea what combat is like but he has still wangled his way into "advising" scores of war films... Sheesh.
Might I suggest “We Were Soldiers Once & Young” by Mel Gibson. I don’t know personally how realistic it is - but it did have vet technical advisers (I’m thinking the camera man that was in the fight and/or Hal Moore). And folks that know say it was pretty accurate portrayal.
Regardless - I enjoyed (if that is the right word) it.
Ahhh but there are some great quotes from that movie and this man: 
uttered most of them.
Though the most memorable quote for me was:
Pvt Joker: "How can you shoot women and children"?Door Gunner: "Its easy. You just don't lead them as much!"
The second most memorable quote for me is:
Door Gunner: Fires weapon out door of helicopter and then states: "Anyone who runs is V.C. Anyone who stands still is well-disciplined V.C."
Classic Stuff!