The silver color of the PT-17 biplane trainer aircraft (properly known as the Kaydet but commonly called the Stearman) is correct for the time when the Tuskegee Airmen were training. The attractive blue and yellow paint scheme displayed on most Kaydets today is from before WWII.
The barracks used in the movie are located in Fort Chaffee, right outside of Fort Smith, Arkansas. These same barracks were used in the filming of Biloxi Blues (1988) with Matthew Broderick.
When the 99th gets Ramitelli, Hannibal has 2 swastikas and Train has 1 kill. They each get a kill when they discover a straggling bomber. It is reported that HQ confirmed the kills. The next time they are in the air and find a destroyer, each plane still has the same number of swastikas. They should each have added one more to their planes since HQ confirmed the kills earlier.
Lt. Glenn: [Cadet Johns has just died in a crash]
Cadet Lewis Johns just taught you the most important lesson you'll learn here at Tuskegee. If you don't believe in God, you'd better find a damn good substitute.
Major Sherman Joy: You, people. Don't you know how bad we treat you, people? Serving your country? This ain't your country. You country is full of apes and gorillas, malaria, missionaries...