Helenus found the city of Buthrotum. After Neoptolemus left Epirus, he left Andromache and their sons in Helenus's care. Neoptolemus was killed by Orestes, Agamemmon's son, in dispute over Hermione, the daughter of Menelaus and Helen, whom Orestes had been promised as wife, but whom Neoptolemus had taken. As the kingdom of Neoptolemus was partitioned, this led to Helenus acquiring the rule of Buthrotum, as king. "Helenus, a son of Priam, was king over these Greek cities of Epirus, having succeeded to the throne and bed of Neoptolemus." Andromache bore him a son, Cestrinus, who is identified with Genger or Zenter,
Trojan War prevailed, and Helenus abandoned Troy for Mt. Ida. Calchas said that Helenus knew the prophecies concerning the fall of Troy, so Odysseus waylaid Helenus. Under coercion, Helenus told the Achaeans that they would win if they retrieved Pelops' bones, persuaded Achilles' son Neoptolemus to fight for them, and stole the Trojan Palladium. The Greeks retrieved Pelop's bones, and sent Odysseus to retrieve Neoptolemus, who was hiding from the war in King Lycomedes's court in Scyros. Odysseus gave him his father's arms. Eurypylus, son of Telephus, leading, according to Homer, a large force of "Kêteioi", or Hittites or Mysians according to