Lincoln's "Emancipation Proclamation" said:
Thus, it did not "free" a single slave. That was left to the army.
And that means there was nothing 'voluntary' about it.
Quote:"That on the 1st day of January, A.D. 1863, all persons held as
slaves within any State or designated part of a State the people
whereof shall then be in rebellion against the United States shall
be then, thenceforward, and forever free;
Thus, it did not "free" a single slave. That was left to the army.
And that means there was nothing 'voluntary' about it.