In this alternative timeline, the promise made when Lee surrendered weren't honored, and shortly after the battle, Lee and his men are taken captive by another Union General. Then Richmond is torched like Atlanta was by Sherman. Finally, the Southern states are forced into a treaty similar to Versailles after WW1. Where they accept total responsibility for the war, and remain occupied under martial law by the Union Army until they pay off the total cost of the war. Jefferson Davis, General Lee, and other high ranking Confederates are publicly hanged for Treason in Washington DC, and Confederate officers and their families are rounded up, and sent to penal colonies in Liberia. Which becomes the American equivalent of Australia in this timeline. A reign of terror is waged against Confederate sympathizers, and those associated with the Klan. Resulting in many Southern towns and cities torched after the war as an example of what happens to those who resist occupation. The Union Army converts Southern Plantations into prisons for political dissidents, and become property of the US military. Slavery is still abolished in this timeline, as it was in ours. How does this impact the rest of American History down to the present?