Question. Context: The film received positive reviews upon its release, in December 1939, although some reviewers found it overlong. The casting was widely praised, and many reviewers found Leigh especially suited to her role as Scarlett. At the 12th Academy Awards, it received ten Academy Awards (eight competitive, two honorary) from thirteen nominations, including wins for Best Picture, Best Director (Fleming), Best Adapted Screenplay (posthumously awarded to Sidney Howard), Best Actress (Leigh), and Best Supporting Actress (Hattie McDaniel, becoming the first African American to win an Academy Award). It set records for the total number of wins and nominations at the time. The film was immensely popular, becoming the highest-earning film made up to that point, and held the record for over a quarter of a century. When adjusted for monetary inflation, it is still the most successful film in box-office history.

Question: when did gone with the wind won 10 academy awards?
Answer. At the 12th Academy Awards
What step-by-step reasoning justifies that answer?
Reasoning: To answer the question, consider the following: At the 12th Academy Awards, it received ten Academy Awards (eight competitive, two honorary) from thirteen nominations, including wins for Best Picture, Best Director (Fleming), Best Adapted Screenplay (posthumously awarded to Sidney Howard), Best Actress (Leigh), and Best Supporting Actress (Hattie McDaniel, becoming the first African American to win an Academy Award).