1. Sailors and passengers were issued a daily food ration, largely consisting of hardtack and beer.

2. In 1958, Boxer was the flagship during Operation Hardtack, a series of nuclear weapons tests in the central Pacific.

3. SeaBiscuit was named for his father, as hardtack or "sea Biscuit" is the name for a type of cracker eaten by sailors.

4. In reality, Grant relied on the local economy to provide him only foodstuffs for men and animals, but there was a constant stream of wagons carrying ammunition, coffee, hardtack, salt, and other supplies for his army.