Who was the key figure behind the establishment of the Army's standards and discipline as detailed in the Blue Book?

The key figure behind the establishment of the Army's standards and discipline, as outlined in the Blue Book, is General Steuben. Baron Friedrich Wilhelm von Steuben played a crucial role during the American Revolutionary War by developing a systematic set of training procedures and regulations for the Continental Army. His work, encapsulated in "Regulations for the Order and Discipline of the Troops of the United States," commonly referred to as the Blue Book, established foundational military standards, drills, and discipline that were essential for transforming the poorly trained militia into a more effective fighting force. His emphasis on discipline and structured training significantly improved the efficiency and effectiveness of the Army, influencing U.S. military practices for years to come.