The paramilitary Blackhawks were one of the most closed-door groups in comic-book history.  After the admission of Chop-Chop in 1941 (subsequent revisions would set it later in the war), no-one else was awarded a Blackhawk uniform until 1957.  That’s when Jim Turner joined the team, albeit under somewhat spurious circumstances.  As you can guess, Turner’s status as a reserve Black Knight lasted o…