All states that succeed from the union will be readmitted without any penalty.
#No more slaves
We are free!
#Angel of the battlefield
Abraham Lincoln helped prevent Confederate states from fighting again after they lost the Civil War by allowing them to be brought back into the United States without any punishment and treating them with respect.
The nation is back together
When the war officially ended, and the Emancipation Proclamation was given, all slaves were freed and the 13th amendment was passed which prohibited any black men or women from becoming slaves ever again.
#Together but separated
Clara Barton, also known as the Angel of the Battlefield helped wounded soldiers that fought in battles. Clara help get supplies and nurse soldiers back to health. Later she founded the Red Cross to help more people.
The end of the Civil War meant that the U.S. would be brought back together as one nation. Obviously, the former Union and Confederate sides wouldn't be best friends immediately but being readmitted allowed them to start forgiving eachother.
WE STILL DON'T LIKE THEM!
Before the Civil War even begun, the tensions were high between the Union and Confederate. Many slaves were running away and people were being punished for helping runaways. Sectionalism was at it's high and people were always fighting.