What was an effect of the Civil War?

The Civil War confirmed the single political entity of the United States, led to freedom for more than four million enslaved Americans, established a more powerful and centralized federal government, and laid the foundation for America's emergence as a world power in the 20th century.Though freedom did not lead to equality for former slaves, the Civil War initiated immense constitutional changes that re-defined the nature of American society and acted as a point of departure in the struggle for equal civil and human rights.