John S. Mosby, American colonel (d. 1916)
John Singleton Mosby (December 6, 1833 – May 30, 1916), also known by his nickname, the "Gray Ghost", was a Confederate army cavalry battalion commander in the American Civil War. His command, the 43rd Battalion, Virginia Cavalry, known as Mosby's Rangers or Mosby's Raiders, was a partisan ranger unit noted for its lightning-quick raids and its ability to elude Union Army pursuers and disappear, blending in with local farmers and townsmen. The area of northern central Virginia in which Mosby operated with impunity became known as Mosby's Confederacy. After the war, Mosby became a Republican and worked as an attorney, supporting his former enemy's commander, U.S. President Ulysses S. Grant. He also served as the American consul to Hong Kong and in the U.S. Department of Justice.