Not that impressed

We are invited by the people who made it to believe that the film Operation Mincemeat is about a relatively unknown episode in World War II.
    Sounds like whoever wrote the book on which the new film is based, and the bunch who made the film, never saw the 1956 film The Man Who Never Was, which was based on the 1953 book of the same name by Ewen Montagu, the bloke who came up with the idea in 1943.