Well, victory in the south certainly. Which then allowed the remaining southern US forces to reinforce Washington around Cornwallis at Yorktown, and prevented the southern English forces from attacking Washington’s trenches and reinforcing Cornwallis.
Cornwallis had come south from the NY-NJ-PA region to join up with the southern English troops.
Washington’s General discusses the career of Nathaniel Greene, who held only two ranks in the American army: Private, and General.As a private, he was less than distinguished. As a general, he was indispensable as quartermaster. This frustrated him because he wanted to win glory in battle - notwithstanding that “amateurs discuss strategy and tactics, but professionals discuss logistics.”
As matters turned out, the real action in the Revolution always turned out to involve Corwallis - and Greene as well. Washington sent Greene south to repair an apparently lost situation; the British were rolling up the revolution from south to north, and Washington didn’t have much to send south with Greene.
Morgan was under Greene’s orders when he conducted the battle of Cowpens.