Answer:
Slavery
Explanation:
If you are talking about the civil war
The aftermath of the Civil War was exhilarating, hopeful and violent. Four million newly freed African Americans faced the future of previously-unknown freedom from the old plantation system, with few rights or protections, and surrounded by a war-weary and intensely resistant white population.
The correct answer is D. <span><span>commander of the Continental Army~</span></span>