What were the disagreement regarding how former confederate states might re-enter the union?

The Confederates and Union had a disagreement regarding the legitimacy of the Confederacy and the abolition of the slave trade in the U.S. The Confederates is a group of states in the U.S. that are known as slave states. The confederacy was built with the notion of eliminating slavery in the U.S.

Idon’t know this answer but you can ask google i bet the answer is on there