After more than 40 wars, Dale Dye knows his stuff--and those are just the battles he has fought in films. The veteran of Platoon , Saving Private Ryan, and Band of Brothers began his military-movie-consulting career after racking up three Purple Hearts in the Marines in Vietnam. At age 60, he tweaks scripts, whips actors into shape, directs, and acts; he plays himself on HBO's Entourage, training the main character to be "Aquaman." Not only does he appear as a general in The Great Raid, starring Benjamin Bratt and based on the World War II mission to save 500 American...