Analyze the film Glory.

Glory is a film that addresses the long-neglected story of the participation of African American soldiers in the Civil War. For at least a century after the war ended, white America attempted, partly unconsciously, to act as if black people had had no active role in the war and even to claim that the whole question of race and slavery was somehow irrelevant. In reality, the principal issue that caused the war was slavery, and several hundred thousand African American men served in the Union Army and contributed to the Union victory.
Earlier Hollywood treatments of the war ignored these facts, portraying the conflict wholly as a white man's war. The two most famous Civil War films are still, arguably, The Birth of a Nation (1915) and Gone with the Wind (1939), both of which are pro-Southern. The former is openly racist, portraying black people negatively and stereotypically. Despite its exalted status and the fact that it is still frequently shown on television, Gone with the Wind also perpetuates these stereotypes (albeit in a more subtle way) and suggests that slavery was a benign institution in which the enslaved people were well-treated and were happy with their lot.
Glory, by contrast, is realistic in depicting the desire of African Americans for freedom and their wish to serve in the Union Army. They knew that a Union victory was the only hope for the abolition of slavery. In the attack on Fort Wagner in South Carolina with which the film culminates, although the 54th Massachusetts Reginent was ultimately unsuccessful, African American soldiers demonstrated through their courage that they were greater in defeat than the Confederate forces that triumphed over them. Prior to this, even many on the Union side had doubted that black men had the ability or the will to fight for the cause. Ultimately, African Americans were a decisive factor in the war as a whole and helped immeasurably in facilitating the Union victory.

Glory is a 1990 feature film directed by Edward Zwick and written by Kenneth Jarre. Praised for its fine performances and powerful evocation of a particular episode of the Civil War as well as for its overall historical accuracy, it is one of few films to highlight the contributions of African American soldiers to the Union Army’s efforts. The true event is that in 1863, the 54th Massachusetts Volunteer Infantry played a pivotal role in the assault on Fort Wagner, near Charleston, South Carolina. The regiment sustained massive casualties and injuries, including their white commanding officer, Colonel Shaw, but proved to all that black soldiers would step up to do their part, which white officers had sometimes doubted.
The film featured outstanding performances by numerous African American actors, notably Morgan Freeman and Denzel Washington; white actor Matthew Broderick plays Colonel Shaw. It traces the formation of the regiment in Massachusetts and takes the soldiers through the Fort Wagner attack. Shaw is the only real historical character, however; the African American characters are composites of actual soldiers, of which, because they were from the North, only some were former slaves. Those characters, although not fully rounded, convey the differing viewpoints of “volunteers” who enthusiastically joined the fight or needed convincing that they had a role in the conflict. The film has also been influential as it has stimulated increased attention by historians to the role of African American troops.
https://newrepublic.com/article/91210/tnr-film-classics-glory-january-15-1990