What action provided the basis for the Emancipation Proclamation?

From the first days of the Civil War, slaves had acted to secure their own liberty. 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.

Explanation:

it is

a

asked for and recieved from the united states

i think it’s will be a yes