God is My Co-Pilot (1945)
This WWII era movie is a more accurate portrayal of the American Volunteer Group, the "Flying Tigers". http://www.imdb.com/title/tt0037746/
This movie is told from the perspective of a real member of the Flying Tigers, Col. Robert Lee Scott http://www.39thflighteagle.org/Heroes/RobertScott.htm
This film was made during WWII and contains period portrayals of the Japanese, but the planes, especially the P-40s (and B-17s, B-25s, DC-3, P-43) are real. As usual, AT-6s are "stand-ins" for the Japanese Zeroes.
Unfortunately, this film is not widely available on DVD and it is rarely shown on cable.