Sarah, Henri and James learn how Virginia slave James Armistead overcame tremendous obstacles to play a pivotal role in the Revolution, and watch the climactic siege and decisive American victory at Yorktown in two animated episodes of PBS's award-winning series. Sarah and Henri go from camp to camp with Lafayette as he jousts with Cornwallis, while James follows the maneuvering of Washington and Henry Knox in James Armistead. Then, Moses' brother, Cato, escapes from Cornwallis while Moses joins the American mining corps, and the kids witness the American siege and victory in Yorktown.