Thyestes killed Atreus. While Thyestes ruled Mycenae, the sons of Atreus, Agamemnon and Menelaus, were exiled to Sparta. There, King Tyndareus accepted them as the royalty that they were. Shortly after, he helped the brothers return to Mycenae to overthrow Thyestes, forcing him to live in Cytheria, where he died. As a token of good will and allegiance, King Tyndareus offered his daughters to Agamemnon and Menelaus as wives, Clytemnestra and Helen respectively. When Agamemnon left Mycenae for the Trojan War, Aegisthus seduced Agamemnon's wife, Clytemnestra, and the couple plotted to kill her husband upon his return. They succeeded, killing Agamemnon
Hippocoon (king of Sparta) Cepheus' sons did survive). Hippocoon (king of Sparta) In Greek mythology, Hippocoön (; Ancient Greek: Ἱπποκόων) was a Spartan king. Hippocoon was the son of the Spartan King Oebalus and Bateia. His brothers (or half-brothers) were Tyndareus and Icarius. Names of Hippocoön's sons include Lycon, Alcinous, Dorycleus, Scaeus, Enarophorus, Eurytus, Bucolus, Euteiches, Lycaethus, Hippothous, Tebrus, Hippocorystes, Alcimus, Dorceus, Sebrus, Eumedes, Enaesimus, Alcon and Leucippus (the last three were among the Calydonian hunters). Diodorus Siculus states that there were twenty of them, but gives no individual names. When their father died, Tyndareus became king. Hippocoön, with the help of his sons,