What conditions did the southerners states have to meet in order to rejoin the union?

Southern states had to meet several conditions to rejoin the Union following the Civil War, primarily outlined in the Reconstruction Acts. They were required to create new state constitutions that guaranteed suffrage for African American men, ratify the Fourteenth Amendment, and establish loyalty to the Union. Additionally, states had to be governed by military oversight until they met these requirements, ensuring the protection of rights for newly freed citizens.