A major result of the Civil War was the strengthening of the federal government.

The conflict highlighted the need for a strong central authority to maintain national unity and enforce laws, particularly regarding civil rights and the abolition of slavery. Following the war, the federal government took a more active role in various aspects of American life, including Reconstruction efforts in the South. This period led to the passage of key amendments, such as the 13th, 14th, and 15th Amendments, which aimed to protect the rights of newly freed African Americans and promote equality.