Victor Fleming made 'The Wizard of Oz' in 1939, but which other epic film did he direct in the same decade?

Explanation

Victor Fleming was an American film director, who in the course of the same year, 1939, directed two of the biggest film classics ever: 'The Wizard of Oz' and 'Gone With the Wind'. This makes him the only film director in the world to have two films in the Top 10 of the American Film Institute's list of the 100 Best American Films ever.