Possible Subjects to try:
Note: “African Americans” used for United States; “Blacks” is used for people worldwide.
African Americans -- Civil rights
African Americans -- Economic conditions
African Americans -- Social conditions
African Americans -- Politics and government
African Americans -- Segregation
Black nationalism – United States
Reconstruction (U.S. history, 1865-1877)
Southern States – Race relations
United States – History – Civil War, 1861-1865
United States. President (1861-1865 : Lincoln). Emancipation Proclamation