Trivia: The Burning of Atlanta scene was shot long before filming started on Gone with the Wind and indeed before either of the actors were cast in the role of Rhett and Scarlet. The purpose of this was to clear the lot so the sets for the movie could be built. The buildings being burnt were sets from other films, the most noticeable being the huge gates featured in the original King Kong movie. The two actors in this scene were simply stunt doubles who doubled for Vivien Leigh and Clark Gable.
Trivia: In the scene when Rhett hands Mammy a glass of whisky, you can see her sniff it before drinking. When it was originally filmed, tea was supposed to have been in the glass, but Clarke Gable (Rhett) substituted real whisky as a joke. The actress playing Mammy downed the glass, not realizing what was in it. The scene had to be redone, with tea, and obviously the actress didn't trust Gable after the first incident.
Trivia: In the scene where Scarlet goes to look for Dr. Meade to help her with Melanie's delivery she goes to the hospital and encounters all the wounded soldiers. For this scene, the filmmakers were unable to get enough extras so for the injured soldiers lying in the distance they used dummies. The extras lay beside the dummies and by using strings, the filmmakers were able to move the arms and legs making it look like the dummy was moving.
Trivia: Bette Davis turned down the role of Scarlett when it was offered to her. She hated the script and thought the film was destined to fail at the box office, and she thought that Rhett Butler was going to be played by Errol Flynn, whom she loathed and with whom she refused to work.