WI: The Battle of The Crater is a success?

I suppose this has been discussed ad nauseam, but it's still an interesting question. Suppose that the African-American troops who were originally trained for the battle are sent in. Is it a reasonable assumption that they succeed in moving around the edge of the crater and rolling up the confederate flank and what effects would this success(or a failure if that is likelier) have militarily, politically, and socially?
 
Top