Answer:
The Emancipation Proclamation confirmed their insistence that the war for the Union must become a war for freedom. It added moral force to the Union cause and strengthened the Union both militarily and politically.
Step-by-step explanation:
It also effectively destroyed slavery as the Union armies advanced south and conquered the entire Confederacy. The Emancipation Proclamation also allowed for the enrollment of freed slaves into the United States military. During the war nearly 200,000 blacks, most of them ex-slaves, joined the Union Army.