In the movie, Gibson’s the one who sells Green on using the militia in the climatic battle. That was Green at Guilford Court House. He then goes around to the militia guys and talks to them the night before the battle, telling them what he wants. That’s Morgan. The battle itself, in the movie, is a variant of the Cowpens [the militia retreat draws an attack by the Brits, who then come under fire from regulars, and get hit again by the militia], and Guilford Court House [Cornwallis fires into his own men].
Yep...you nailed it.