Friedrich Wilhelm August Heinrich Ferdinand von Steuben, also referred to as Baron von Steuben, was a Prussian and later an American military officer. He served as Inspector General and a Major General of the Continental Army during the American Revolutionary War. He was one of the fathers of the Continental Army in teaching them the essentials of military drills, tactics, and discipline. He wrote Regulations for the Order and Discipline of the Troops of the United States, the book that served as the Army's drill manual for decades. He served as General George Washington's chief of staff in the final years of the war. In 1780, von Steuben was elected a member of the American Philosophical Society.