Final answer:
The Thirteenth, Fourteenth, and Fifteenth Amendments were pivotal in granting African Americans freedom from slavery, citizenship, and the right to vote. Despite these Constitutional guarantees, African Americans still faced significant challenges and discrimination, particularly in the South, which persisted for many years thereafter.
Step-by-step explanation:
The Reconstruction Acts, particularly the Thirteenth, Fourteenth, and Fifteenth Amendments, had profound implications for African Americans in the post-Civil War era. The Thirteenth Amendment abolished slavery across the United States, fundamentally reshaping the legal and social status of African Americans formerly held in bondage.
However, in spite of these constitutional guarantees, the reality for many African Americans, particularly in the Southern states, was one of continued struggle against systemic discrimination and disenfranchisement. This discrimination was institutionalized through Jim Crow laws and other mechanisms such as poll taxes and literacy tests.