African americans) in US history from Reconstruction

  What are the three most important events (battle of liberty place, september 1874), issues, or people(african americans) in US history from Reconstruction through World War I? (They do not have to all be events or issues or people, you can "mix and match.") Who or what are they? Why did you choose them? Discuss how each contributed to the growth and evolution of the United States. Be thorough and specific.