How does the article “black soldiers in the civil war” contribute to the civil rights movement? (article listed below) i’ll give 100 points!

Idk if this is what you're looking for but I hope it helps!

Black soldiers hoped that their military service would serve as a powerful claim to equal citizenship for African Americans. When they came home, however, they encountered fierce resistance from white supremacists determined to reassert the prewar racial order.

answer; biological;