Who was the Prussian army veteran who helped train American soldiers during the Revolutionary War?

Friedrich von steuben is the answer Friedrich Wilhelm Rudolf Gerhard August von Steuben, Freiherr von Steuben, (en: Frederick William Rudolph Gerald Augustus von Steuben, Baron von Steuben), (September 17, 1730 � November 28, 1794) was a Prussian army officer who served with George Washington in the American Revolutionary War and is credited with teaching American troops the essentials of military drill and discipline.