After taking us to the depths of space in Interstellar, Christopher Nolan is heading back in time to tell the story of the Dunkirk evacuation during World War II. 400,000 men were cut off following the disastrous Battle of France in 1940 and needed to be evacuated back to the UK but military ships were not coming quick enough and didn’t have the numbers to get the men efficently out of harm’s way, leaving them stranded on the beaches of France and sitting ducks for German fighter planes. The movie follows a number of different characters, including Tom Hardy as a bad ass fighter pilot, Mark Rylance as one of the civilians who takes his sailboat to Dunkirk to help in the evacuation and Harry Styles and Cillian Murphy as some of the troops on the ground. There’s also Kenneth Branagh as a British Naval commander and Agent Carter’s James D’Arcy as well. It looks pretty great and it should be spectacular in IMAX, as most Nolan movies are. It hits on July 21 this summer and you can check out the trailer below.