This is a fictional telling of some events during the evacuation of Dunkirk. Very well done though and follows the stories of a few of its survivors/victims.
The Old Mill Playhouse was maybe 2/3s full this afternoon in the largest Auditorium-- Number 1.
Dunkirk (2017) - Rotten Tomatoes
I could see it being easily in the Oscar race on March 4, 2018.