John Singleton Mosby, the ‘Gray Ghost’, was one of the most effective military leaders of the American Civil War.
Since the close of the war, I have come to know Colonel Mosby personally, and somewhat intimately. . . .There were probably but few men in the South who could have commanded successfully a separate detachment, in the rear of an opposing army and so near the border of hostilities, as long as he did without losing his entire command.— Ulysses S. Grant