French aristocrat Lafayette was a teenager when he came to the U.S. to help the Patriots win the Revolutionary War. He pinned Cornwallis in Yorktown until Washington and Rochambeau arrived for the final encounter. He pulled off one of the greatest escapes in military history, after being completely surrounded. He used his influence with France’s king to speed up support to the Patriot cause. He’s the only foreigner whose portrait hangs in the U.S. Capitol.