At the conclusion of the film a person behind me said, "Incredible," twice. Another person followed with, "A masterpiece." I would concur. Perhaps it isn't a perfect film but it is a movie with great impact. I find that it is a testament to the skill of Clint Eastwood as a director and Iris Yamashita as screenwriter that some of the scenes that had the greatest impact were of minor thingsa letter read out loud, the way someone saluted, a tear, a song...
There were no clear cut heroes or villains beyond "war" itself. I'm reminded of that saying, "No one wins a war. One side simply loses more than the other." War diminishes us all. We must learn to turn our backs on such endeavors even if it means that the military/industrial death merchants take a cut in profits or that they truly learn to hammer swords into plow shares.
If the film were to depict the battle in a manner that was realistically experienced by the soldiers the film would be unbearable to any viewer. One must see the battle and history as a kind of allegorical backdrop to a story about the utter inhumanity and futility of war. As a film it had to illustrate the overall societal insanity of war through a human lens, and it did this in a deeply moving way.