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
Menelaus (son of Lagus) Menelaus (son of Lagus) Menelaus (; , "Menelaos"), son of Lagus and brother of Ptolemy I Soter (ruler of Egypt), served as priest of the eponymous state cult of Alexander, and was for a time king in Cyprus, under his brother. His name does not occur among the officers or generals of Alexander the Great (336–323 BC) during the lifetime of that monarch, though it is incidentally mentioned by Phylarchus in terms that would seem to imply that he then already occupied a distinguished position. The first occasion on which he appears in history is 315 BC, when he was