1917 is a 2019 epic war film directed, co-written and produced by Sam Mendes. The film stars George MacKay, Dean-Charles Chapman, Mark Strong, Andrew Scott, Richard Madden, Claire Duburcq, with Colin Firth, and Benedict Cumberbatch. The film is based in part on an account told to Mendes by his paternal grandfather, Alfred Mendes. It chronicles the story of two young British soldiers during World War I in the spring of 1917 who were given a mission to deliver a message. It warns of an ambush during a skirmish soon after the German retreat to the Hindenburg Line during Operation Alberich.