Which side did General von Steuben assist?

Friedrich Wilhelm August Heinrich Ferdinand von Steuben (born Friedrich Wilhelm Ludolf Gerhard Augustin von Steuben; September 17, 1730 - November 28, 1794), also referred to as the Baron von Steuben, was a Prussian-born military officer who served as inspector general and Major General of the Continental Army during the American Revolutionary War. He is credited with being one of the fathers of the Continental Army in teaching them the essentials of military drills, tactics, and disciplines. He wrote the Revolutionary War Drill Manual, the book that served as the standard United States drill manual until the War of 1812. He served as General George Washington's chief of staff in the final years of the war.

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