The stats are out there, but I don’t feel like doing that digging right right now. I’ll just end by saying that a rebellion by 179,000 slaves would be considered a pretty big deal, given that Nat Turner’s Rebellion, which spread horror throughout the south, involved less than a hundred.
To me a slave rebellion is something like what occurred in Haiti, an uprising that involves the murder of civilians. There were only a few such incidents in America but the possibility of something like it was a regular worry after the events in Haiti.
By contrast the USCT were fighting as part of the Union Army and that’s not comparable in my opinion, it didn’t involve murder.