Final answer:
World War II led to a major shift in the role of the US in the world and had a significant impact on African Americans, who played a crucial role in the war effort. Their contributions led to increased demands for civil rights and greater opportunities for equality.
Step-by-step explanation:
World War II marked a major shift in the role the US played in the world. The war forced the United States to involve itself once again in European affairs and become a global superpower. This had a significant impact on African Americans as they played an important role in the war effort, working in the defense industry and filling the jobs left vacant by men who went off to fight. Their contributions, along with other minorities and women, led to increased demands for civil rights and greater opportunities for equality.