This video is really good to watch if you are studying about American Revolution.
Sarah, James, and Henri accompany George Washington to Boston, where he takes command of the American army and the city's defense. Later, James goes with Henry Knox to Fort Ticonderoga. They bring back cannons that help the rebels drive the British out of Boston.
Click this link for The American Revolution Timeline: http://www.timetoast.com/timelines/the-american-revolution-timeline--24