“The failure of emancipation to take root during the war is one of the great What ifs of the Revolution. Another is: What if blacks had not fought for the American cause? What if a slave had not saved Colonel William Washington’s life, with the result that his cavalry charge dissolved and the Battle of Cowpens had become a British victory? As the historian Thomas Fleming speculates, both North and South Carolina might well have gone over to the British. What if Glover’s regiment of Massachusetts sailors had not had the manpower to complete the evacuation of Washington’s army before the fog lifted in New York—and Washington himself, waiting for the last boat, had been captured? *”