Nothing really. the war was already over but the troops from both sides didn't find out until after the battle. I guess it just saved the city from being destroyed.
The compromise solution was to count three out of every five slaves as people for this purpose. Its effect was to give the Southern states a third more seats in Congress and a third more electoral votes than if slaves had been ignored, but fewer than if slaves and free people had been counted equally.
If this is multiple answers, then it would be all of them, but if it is one choice, it would be A, a flat area covered primarily in sand.