[billbears]

From the same link

However, by the fall of 1862, events had changed in favor of accepting black soldiers. Declining Union enlistments, heavy battle losses and the realization that the war would take more time and resources than expected, confronted President Abraham Lincoln and the Union Army. Continued pressure by abolitionists and awareness of the potential of black labor as the Confederacy had already discovered, also contributed to lifting the Army's prohibition of "Negroes or Mulattoes," in existence since 1820.

Let's see, the Emancipation Proclamation was released in Sept '62 and the change in Army procedures didn't happen until at least after that

[Ditto]

If the CSA had allowed freedom in exchange for service in 1862, the outcome might have been different. But there was no chance of the slaveocrats simply giving their property away, was there bill?