Answer:
They divided the South into military districts, withholding statehood from some former Confederate states until 1870. Among the most important legacies of the Civil War was addition of three amendments to the U.S. Constitution, promising freedom and full rights of citizenship to African Americans. The 13th Amendment freed enslaved African Americans. The 14th Amendment established African American citizenship and equal protection under the law. Finally, the 15th Amendment granted African American men the right to vote. Without enforcement, however, these amendments had limited effects, especially in the South.
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