The theory's perfectly feasible

The superstars of the time - Gregory Peck, Anthony Guinn, David Diven, Anthony Quayle, Irene Papas, Stanley Baker and James Darren - in an epic war movie (directed by J. Lee Thompson). Allied saboteurs are assigned a mission to infiltrate an impregnable nazi-held Greek island and destroy the two enormous long-range field guns. Incredible and fierce war movies done recent times, but they aren't producing such affectionately crafted piece of art any longer.