The Achaeans built the Wall to protect themselves and their beached ships from the Trojans: see the comments on I.07.336–343 and I.07.433–465. But this Achaean Wall is doomed to disappear without a trace in the future, since it was built ‘against the will of the immortal gods’, I.12.008–009 (θεῶν δ’ ἀέκητι τέτυκτο | ἀθανάτων). That is, the Wall was built against the will of the gods Poseidon and Apollo: see the comment on I.07.433–465. And when will it happen, that the Achaean Wall disappears? The timespan of the Wall, says the Master Narrator, depends on the timespan of narrating the story of the Iliad: ‘while Hector was still alive and while Achilles had-his-anger [mēniein]’, I.12.010 (ὄφρα μὲν Ἕκτωρ ζωὸς ἔην καὶ μήνι’ Ἀχιλλεὺς). But then, in the very next verse, the timespan is extended further: the Wall of the Achaeans will not be destroyed while Troy, that mighty city of the king Priam, is not yet destroyed, I.12.011 (καὶ Πριάμοιο ἄνακτος ἀπόρθητος πόλις ἔπλεν). Why the extension? It is because the epic fame of the Achaean Wall depends on the epic fame of the Iliad, and the narration of the Iliad is still in progress. Once the Iliad is narrated, there will be no further need for the Achaean Wall. But there will still remain a further need for the Wall of Troy, which will not yet be destroyed when the narration of the Iliad is completed. Meanwhile, the epic fame of the Achaean Wall, which depends of the narration of the Iliad, still in progress, is threatening the older epic fame of the Trojan Wall, as we can observe already at I.07.448–453: there we see that the Trojan Wall had been built by the gods Poseidon and Apollo for the former king of Troy, Laomedon, who was predecessor of the current king, Priam, and, in the words of Poseidon himself, the Wall built by the Achaeans has an epic glory or kleos, I.07.451, which now threatens to eclipse the corresponding glory of the Trojan Wall built earlier by the two gods, I.07.452–453. The wording at I.07.451 already highlights the epic glory or kleos of the Iliad, which concentrates on the Achaean Wall, as distinct from the kleos conferred by earlier epic traditions that concentrate on the Trojan Wall, I.07.458, as noted in the comment on I.07.433–465. After the story of the Iliad is told—or, more precisely, after Troy is destroyed and the Achaeans are already departing for home, I.12.13–16—then the gods can finally remove this Iliadic threat to the kleos of the Trojan Wall: now Poseidon and Apollo will let loose all the rivers in the region of Troy, which will then flood away all traces of the Achaean Wall, I.12.17–33. This divine action, as foretold here, of removing the mis-en-scène or scenery of the Iliad is already foretold at an earlier point by Zeus himself, at I.07.455–463. Relevant to these prophecies is what we read in Strabo 13.1.36 C598: νεωστὶ γὰρ γεγονέναι φησὶ τὸ τεῖχος (ἢ οὐδ’ ἐγένετο, ὁ δὲ πλάσας ποιητὴς ἠφάνισεν, ὡς Ἀριστοτέλης φησίν) ‘the Poet [= Homer] says that the Wall [= the Achaean Wall] had only recently come into existence, or it never existed at all, and the Poet made it up [plattein] and then made it disappear, as Aristotle [F 162 ed. Rose] says’. To paraphrase Aristotle: Homeric poetry foretells the non-existence of the Achaean Wall in a future time of its own performance, and such a future time will be a post-heroic age (HPC 155n16). On the Homeric conceptualization of a post-heroic age, see the comment on I.12.023 below, featuring the word hēmitheoi ‘demigods, half-gods’.