On February 23, 1778, Baron von Steuben joined the Continental Army at Valley Forge. From the article:
"Friedrich von Steuben arrives at Valley Forge
Friedrich Wilhelm Rudolf Gerhard August, Freiherr von Steuben, a Prussian military officer, arrives at General George Washington’s encampment at Valley Forge on this day in 1778 and commences training soldiers in close-order drill, instilling new confidence and discipline in the demoralized Continental Army.
Baron von Steuben, as he is better known, was the son of a military engineer and became a Prussian officer himself at the age of 17. He served with distinction and was quickly promoted from infantry to Frederick the Great’s General Staff. In 1763, at age 33 and with the rank of captain, he was discharged for unknown reasons. His title of freiherr, or baron, came with his subsequent post as chamberlain (or palace manager) to the petty court of Hohenzollern-Hechingen in Swabia, or the southwestern Holy Roman Empire, in what is now Baden-Wuerrtemberg. Employed by an indebted prince, von Steuben searched for more lucrative employment in foreign armies. The French minister of war recommended von Steuben to Benjamin Franklin as a resource to the Continental Army in 1777. Franklin in turn passed on word of Steuben’s availability to George Washington, and by February 23, 1778, he was among the desperate Continentals camped at Valley Forge.
Von Steuben, who did not speak English, drafted a drill manual in French, which Alexander Hamilton and Nathanael Greene then translated into English. The Prussian drill techniques he shared were far more advanced than those of other European armies, let alone those of the ragtag Patriots. The ego-crushing methods of modern boot camp were practiced among the shoeless soldiers of Valley Forge with remarkable efficacy. Most important for 18th-century battle was an efficient method of firing and reloading weapons, which von Steuben forced the Patriots to practice until it became second nature.
Before von Steuben’s arrival, colonial American soldiers were notorious for their slovenly camp conditions. Von Steuben insisted on reorganization to establish basic hygiene. He demanded that kitchens and latrines be put on opposite sides of the camp, with latrines facing a downhill slope. (Just having latrines was novelty to the Continental troops who were accustomed to living among their own filth.)
On the merit of his efforts at Valley Forge, Washington recommended that von Steuben be named inspector general of the Continental Army; Congress complied. In this capacity, von Steuben propagated his methods throughout the Patriot forces by circulating his Blue Book, entitled Regulations for the Order and Discipline of the Troops of the United States."