In the first minutes of the writer-director David Ayer’s “Fury,” about American soldiers slogging through Europe in the final days of World War II, Brad Pitt, as the tanker Don Collier, slides his knife behind the eye of a German lieutenant.“Piercing his brainpan with a CRACK,” is how Mr. Ayer’s screenplay describes the move. (In Dolby Digital sound, it will be a very loud crack.) Mr. Pitt, our hero, then calmly wipes his blade clean on the German’s uniform.The Good War this is not.In what promises to be one of the most daring studio movies in an awards season that...