It’s been a day full of hot new trailers, care of Warner Bros. Pictures. Next we bring you the official trailer for Dunkirk.

It was a colossal military disaster. Nearly 400,000 Allied soldiers trapped on the beach at Dunkirk, France, surrounded by Nazi forces. Their harrowing escape—a pivotal moment at the start of World War II— is the subject of this epic new film from director Christopher Nolan. Watch the new trailer above.

Dunkirk lands in theaters July 21.