Dunkirk is a war epic that portrays the evacuation of 400,000 British troops out of Dunkirk, France from three perspectives: land (one week of action), sea (one day of action), and air (one hour of action). Director Christopher Nolan shot the film on location in IMAX with real World War II planes, boats, and submarines.
For the background story, watch Darkest Hour, which was released the same year.
For the background story, watch Darkest Hour, which was released the same year.