Answer: True
Explanation: The emancipation proclamation legally freed the slaves in the United States. By winning the war the North would ensure the law of the United States was in place over the Southern States instead of the law of the Confederacy.
At the beginning of the Civil War (and while running for President) Abraham Lincoln had said that he would not week to end slavery. The emancipation proclamation marked a definate (and permanent) change in that policy.
