3.18
Departing from Mysia, the Greeks put to sea, and a violent storm coming on, they were separated from each other and landed in their own countries.Compare Proclus in Epicorum Graecorum Fragmenta, ed. G. Kinkel, p. 19, according to whom Achilles, on this return voyage, landed in Scyros and married his youthful love Deidamia, daughter of Lycomedes. See above, Apollod. 3.13.8. So the Greeks returned at that time, and it is said that the war lasted twenty years.Compare Hom. Il. 24.765ff., where Helen at Troy says that it was now the twentieth year since she had quitted her native land. The words have puzzled the Scholiasts and commentators, but are explained by the present passage of Apollodorus. For it was in the second year after the rape of Helen that the Greeks, having completed their preparations, set out on the expedition and after their retirement from Mysia to Greece eight years elapsed before they again returned to Argos and came to Aulis.
3.19
Having again assembled at Aulis after the aforesaid interval of eight years, they were in great perplexity about the voyage, because they had no leader who could show them the way to Troy.