Early in the American Revolutionary War, Virginia Royal Governor Lord Dunmore encouraged all slaves to rebel against any seditious masters, promising freedom in exhange.
He received an enthousiastic response but lacked resources to arm them. Virginia's colonial forces ejected the collection of Redcoats, Loyalists and freedmen without overly much of a problem in 1775.
Though tens of thousands of slaves used the Revolution as an opportunity to escape, many serving the British in some capacity, the services of the black population was never fully tapped for fear of alienating the Loyalist white population.
What if the Virginia insurgancy continued with a low level guerilla war that lasted the entirity of the Revolution?
Even with an American victory, how would this affect the development of the new nation and the racial relations?