As I mentioned in the post, I always check the actual history after watching any historical films. And it offends me that directors change most of the truth just to get better exposure! Mainly when you write "Based on true story" at the movie's beginning!

They can change small facts; as you said, it's just a movie, but when they add things that don't happen at all ever, it feels like misleading the viewers.

Thanks for your illustrative comment.