The account of the Battle of Thermopylae found in Diodorus Siculus (11.8.4–10.4) is remarkably different from the more commonly known Herodotean version of events (7.201–33). Most strikingly, his account includes details of a night raid on the Persian camp made by Leonidas and his men. Diodorus’ principal source for this section of the narrative, historians generally agree, was Ephorus of Cyme (c. 405–330 b.c.).Footnote 1 This tradition was later taken up also by Justin (2.11.12–18) and Plutarch (De malignitate Herodoti 866a).Footnote 2 But who was Ephorus’ source? Many believe that Ephorus simply made it up.Footnote 3 However, Michael Flower, in a discussion of Ephorus and his sources, rightly I think, dismisses this verdict on a number of accounts.Footnote 4 Firstly, he questions the willingness of Ephorus’ audience to accept this novel version without Ephorus providing a suitable source for it. Secondly, he points out that scholars have never conclusively demonstrated that Ephorus simply fabricated the events that he related. Instead, dismissing the Greek physician Ctesias of Cnidus (‘It could not have come from Ctesias’Footnote 5), who was active during the last decades of the fifth and early part of the fourth century b.c., Flower argues for the possibility that the lyric poetry of Simonides of Ceos was Ephorus’ source.Footnote 6 It is the argument of this paper that Flower dismisses Ctesias as a source for the Thermopylae nyktomachia too quickly, and that by combining information found in Dracontius (De laudibus Dei 3.279–95) and Tertullian (Apologeticum 9.6) it is probable to conclude that Ctesias is indeed the source for this alternative tradition.
Blossius Aemilius Dracontius, the fifth-century a.d. Christian North African poet, includes in a catalogue of classical exempla in the final book of his biblical epic, De laudibus Dei (LD), a version of Leonidas’ night attack on the Persian camp (3.279–95). Dracontius’ version is consistent with the Diodorus/Justin/Plutarch tradition, and includes in its concluding lines a reflection on the morality of Persian patricide in light of the description in the preceding lines detailing friends and family killing one another rather than their enemies in the confusion associated with warfare in the dark:
In Dracontius’ dubious logic, patricide cannot be a sin (nefas) amongst the Persians because their laws already allow them to marry their own mothers. It is not Dracontius’ judgement of morality, nor his version of events that are of interest here, however, but rather the linking, in his mind at least, of the Thermopylae nyktomachia with this cultural anecdote. For among the other ancient authors who mention this Persian practice is Tertullian, who in the Apologeticum claims Ctesias as his source, Persas cum suis matribus misceri Ctesias refert (9.16).Footnote 8 On the basis of Tertullian's identification of Ctesias as his source for this custom and the juxtaposition by Dracontius of the nyktomachia with the Persian law allowing men to marry their own mothers, it is certainly reasonable to claim that Ctesias then is a probable source for the night attack of the Persian camp made by the Spartans at the Battle of Thermopylae.Footnote 9