Historical clue formulations

• Sharpshooter — 2015-12-21
• Marksman — 2005-02-13
• Sure shot — 2004-08-06
• Calamity Jane, e.g. — 1999-08-21
• Annie Oakley, e.g. — 1998-09-19
• Dick _____, "H.M.S. Pinafore" seaman — 1995-10-21
• Sharpshooter — 1995-01-03