Provisioning a Medieval Army

…While local peasantry, paid or pillaged, usually furnished food and horses’ forage, a major expedition or siege or fleet at sea required organized supply of biscuit, smoked or salted meat and fish, wine, oil, and oats and hay for the horses. Ordinarily knights ate white bread made from wheat, meat in the form of beef, pork, and mutton, and drank wine daily. The common soldier received wine only on feast days or in active combat; otherwise he drank beer, ale, or cider, and ate rye bread, peas, and beans. Fish, cheese, olive oil, occasionally butter, salt, vinegar, onions, and garlic also figured in the rations. Poultry was so widely consumed and easily obtained that it was not recorded. Sugar, honey, mustard, spices, and almonds were kept for the wounded and sick and the privileged. On active duty, soldiers did not fast but were allotted fish as substitute for meat on the twelve “thin” days a month. The more continuous war became, as it did in the 14th century [C.E.], the more organization and money it required.

— A Distant Mirror, Chapter 6