While the true story and heroic efforts of the Dunkirk Evacuation deserve a 10, this movie does not. The worst of it was the droning, somber monotony of the musical soundtrack, particularly in the first portion of the movie, which has to be the most tediously overwrought score in history; followed by another heavy handed long section of a repetitively monotonous 4 or 5 note ascending minor scale, all of which was a serious and unfortunate detraction from the action on screen.

One of the historically unique facts of this evacuation was the civilian fleet of nearly 400 small craft (Wikipedia) which heroically volunteered for this amazing feat, which I think was under-depicted.

By the movie's end, it confirmed the senseless stupidity of geo-political wars and conflicts caused by governmental leaders, and the resulting senseless personal loss at the battle front. But faced with this senselessness, it also celebrated individual acts of bravery and sacrifice.

Conspicuously and sadly absent was a written narrative at the end which summarized and brought into focus the huge scope of this historic evacuation, along with actual photographs.