Who was the prussian officer who helped George Washington train its army at Valley Forge?

The Prussian officer who helped George Washington train the Continental Army at Valley Forge was Baron Friedrich von Steuben. He arrived in America in 1777 and took charge of training the troops, instilling discipline and military tactics that significantly improved their effectiveness in battle. His efforts were crucial in transforming the ragtag army into a more professional fighting force. Von Steuben's contributions were instrumental in the eventual success of the American Revolution.