Possible Clues:

• Eighty
• ''... and seven years ago, our fathers.... (Gettysburg address)
• '... and seven years ago, our fathers.... (Gettysburg address)
• Eighty, in the Gettysburg Address
• Number historically supporting grievance about university
• Result when someone hits a grand slam?
• Start of a Lincoln address
• Our forces dispatched in number
• 1863 speech opener
• 80, to Lincoln