The late sixth-century A.D. Greek historian Menander the Guardsman (Menander Protector) wrote during the reign of the emperor Maurice (582-602). His work, which survives in extensive fragments, is a major source for the end of Justinian's reign and those of his successors, Justin II (565-578) and Tiberius II (578-582). Menander's particular interest was diplomacy, and his fragments are an invaluable, and often vivid, commentary on Roman relations with Persians, Avars, Turks and other nations on their eastern frontier. This edition opens with an introductory essay succinctly gathering the available information about Menander and his History and drawing judicious conclusions; the text has a facing English translation; the volume also contains historiographical notes, tables of correlations of the fragments with earlier collections, bibliography and indexes. This edition is part of R.C. Blockley's long-term project on those classicising historians of the later Empire whose work survives in substantial fragments.