Yes--but
Lee house and grounds, Arlington-- was made into a cemetary-- the dead of the war where burried at his door steps.

Lee was offered the command of the Union army at the begining of the war-- but felt he must be true to his state..

historians have pointed out a language shift-- before the civil war the common phrase was "these United States" after the war it was "The United States" -- and the idea of a national identity was formed.. no longer citizens of New York or Virginia, we became citizens of the United States..