This movie is about Operation Dynamo which was the evacuation of Allied (before the USA were involved) troops from Dunkirk France after a horrific defeat. The movie focuses on the English evacuation where hundreds of their civilians sailed the less than 25 miles to the shore to get their men. They lost 68,000 men on that beach. Let that sink in… 68,000. This movie takes you to that beach and experience the desperation to get off the sea in front of you the enemy solidly at your back and you are getting mowed down from the air with no shelter to take from the enemy’s planes. This movie lets you know what that looks like.