Bucellatum – Roman biscuit
The late-Roman Codex Theodosianus, which is a collection of Roman laws, mentions that a Roman soldier should be equipped with a buccellatum ac panem, vinum quoque atque acetum, sed et laridum, carnem verbecinam, or “hardtack and bread, wine too and vinegar, but also bacon and mutton”(VII.4.6). Hardtack, vinegar and mutton were to be enough for two days, and then the soldier was to use bread, wine and bacon.