Step-by-step explanation:
It seems that your focus is on the achievements and advancements made by African Americans during the period of Reconstruction, specifically between 1867 and 1877. Your research question could be:
What were the key achievements made by African Americans during the period of Radical Reconstruction, and how did they manage to achieve them?
Sources to Consider:
"Reconstruction: America After the Civil War" by Henry Louis Gates Jr. and PBS (documentary)
"A Short History of Reconstruction" by Eric Foner (book)
"Black Reconstruction in America" by W. E. B. Du Bois (book)
"The Civil War and Reconstruction" by David Blight (online course)
"The Freedmen's Bureau and Reconstruction: Reconsiderations" edited by Paul A. Cimbala and Randall M. Miller (book)