It's sort of like the book vs the movie in Blackhawk Down.
One of the central characters, the company clerk who finally got to go into battle and got more than he wished for, in real life was later convicted of rape of a minor (while still in the Army) and is now doing 30+ years at Leavenworth. He was also stripped of all honors, etc.
So, when time came to do the movie, the US Army told Ridley Scott (the director) that in order to gain their cooperation for making the film (which was essential) they had to change the name of that one character, scrubbing a stain from the history that the public views (far more people watch movies than read books), and removing the name of someone who was an embarrassment from public view.