Check out the official "1917" trailer starring Richard Madden, Benedict Cumberbatch, and Mark Strong

At the height of the First World War, two young British soldiers, Schofield (Captain Fantastic’s George MacKay) and Blake (Game of Thrones’ Dean-Charles Chapman) are given a seemingly impossible mission. In a race against time, they must cross enemy territory and deliver a message that will stop a deadly attack on hundreds of soldiers— Blake’s own brother among them.

https://www.zerotrailers.com/title/1917/