I have not seen Glory. The Zinn Education Project website says....

“Can Movies Teach History?” asks the title of a New York Times feature article. The answer for Glory is yes. It is not only the first feature film to treat the role of Black soldiers in the American Civil War; it is also the most powerful and historically accurate movie about that war ever made. If it wins a deserved popularity, it will go far to correct the distortions and romanticizations of such earlier blockbuster films as Birth of a Nation (1915) and Gone with the Wind."

Thanks to you, I will watch it soon.