"The Longest Day" is a 1962 war film that depicts the events of D-Day, the Allied invasion of Normandy during World War II. The film is notable for its ensemble cast, which includes actors like John Wayne, Robert Mitchum, and Sean Connery. It presents the invasion from multiple perspectives, showcasing the planning and execution of the operation. The movie is based on the book by Cornelius Ryan and is known for its realistic portrayal of the challenges faced by both the Allies and the Axis forces. It combines dramatic reenactments with actual historical events, making it a significant cinematic representation of this pivotal moment in history.