With Volume 13, the new edition of The Cambridge Ancient History moves into fresh territory. The first edition was completed by Volume 12, which closed in AD 324. The editors of the new edition have enlarged the scope of Volume 12 to include the foundation of Constantinople and the death of Constantine, and extended the series with two wholly new volumes taking the History up to AD 600. Volume 13, the first of these new volumes, covers the years 337SH425, from the death of Constantine to the reign of Theodosius II.