Leonis Diaconi Calo?nsis Historiae Libri Decem, Et Liber De Velitatione Bellica Nicephori Augusti, presents a Latin edition of Leo the Deacon's historical account, alongside Nicephorus Augustus's treatise on military tactics. This edition, meticulously compiled and edited by esteemed scholars Barthold Georg Niebuhr, Charles Beno?(R)t Hase, and others, provides invaluable insights into the Byzantine Empire.