It freed every slave in the areas under control of the forces of the rebellion. Didn't you read it?
**It freed every slave in the areas...***
So many former slaves were now following Sherman’s army they were tricked and abandoned at Ebenezer creek where hundreds or thousands (depending on the source) drowned trying to cross.
IOW, it freed nobody, because it only applied where the Confederacy was in control, not the Union. As a practical matter, it did nada. Had he intended to f4ree slaves, he could have easily applied it everywhere, not just in the areas he didn’t control.