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• n  very hard unsalted biscuit or bread; a former ship's staple
• n  a mountain mahogany

• Green Fire (MGM) spreads caviar on hardtackwhich hardly improves the hardtack, and pretty well spoils the caviar.
• As the days dragged by, monotonous and deadly, rain came and brought drinking waterand raised mold on the hardtack.
• The Eskimos at Eek vary their fish and seal diet with hardtack.

• pilot biscuit
• pilot bread
• sea biscuit
• ship biscuit

News & Articles

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• Guide to Gettysburg at 150: Sights, sounds and (yes) apps
  Michael Kraus, 59, will be spending three days this week living in a small tent, wearing a wool uniform that will keep him “wet and sticky” in the summer heat and eating hardtack, a biscuit so tough it could damage your teeth.
  July 4, 2013 - NBC NEWS
• Visiting Gettysburg's 150th anniversary 'living history' camps
  Michael Kraus, 59, will be spending three days this week living in a small tent, wearing a wool uniform that will keep him “wet and sticky” in the summer heat and eating hardtack, a biscuit so tough it could damage your teeth.
  July 1, 2013 - NBC NEWS