 The McCain family tree has a long heritage of American military service, with ancestors fighting as soldiers in the Indian Wars, American Revolutionary War (due to which McCain maintains a membership with the Sons of the American Revolution), War of 1812, for the Confederate States of America in the American Civil War, and in World War I.The tree also includes roguish behavior and economic success.John McCain's maternal grandfather, Archibald Wright (1875–1971), was a Mississippi native who migrated to Muskogee, Oklahoma, in his twenties, ran afoul of the law with several gambling and bootlegging charges, then became a strong-willed wildcatter who prospered on land deals during the early statehood years and struck oil in the Southwest.