So, in the Dred Scott case all black people were ruled to be property. When the Emancipation Proclamation was made, it said all the slaves in the south were to be freed. This, as Graham pointed out, gave the North something to fight for, the freedom of the southern slaves. However, the Dred Scott case also made the Missouri Compromise illegal, making all black people in the North suddenly slaves. Lincoln only freed the southern states' slaves. So, the Yankees were trying to free all the slaves in the south so that they would come up north where it is legal to be a slave, and therefore the Northerners would have all the slaves. So, the North's motivation for fighting in the Civil War was not to end slavery, it was to continue it in the north alone. Those evil people.