d for nutritious, easy-to-store, easy-to-carry, and long-lasting foods on long journeys, in particular at sea, was initially solved by taking livestock along with a butcher/cook. However, this took up additional space on what were either horse-powered treks or small ships, reducing the time of travel before additional food was required. This resulted in early armies' adopting the style of hunter-foraging. The introduction of the baking of processed cereals, including the creation of flour, provided a more reliable source of food. Egyptian sailors carried a flat, brittle loaf of millet bread called dhourra cake while the Romans had a biscuit called buccellum. Roman cookbook Apicius describes: "a thick paste of fine wheat flour was boiled and spread out on a plate. When it had dried and hardened, it was cut up and then fried until crisp, then served with honey and pepper." Many early physicians believed that most medicinal problems were associated with digestion. Hence, for both sustenance and avoidance of illness, a daily consumption of a biscuit was considered good for health. Hard biscuits soften as they age. To solve this problem, early bakers attempted to create the hardest biscuit possible. Because it is so hard and dry, if properly stored and transported, navies' hardtack will survive rough handling and high temperature. Baked hard, it can be kept without spoiling for years as long as it is kept dry. For long voyages, hardtack was baked four times, rather than the more common two. To soften hardtack for eating, it was often dunked in brine, coffee, or some other liquid or cooked into a skil