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
History of Sparta inducements served mainly as encouragement to those who were already resentful of Sparta. In the event, it was Sparta who made the first aggressive move using, as a pretext, Boeotia's support for her ally Locris against Sparta's ally Phocis. An army under Lysander and Pausanias was despatched. As Pausanias was somewhat lukewarm to the whole enterprise, Lysander went on ahead. Having detached Orchomenos from the Boeotian League, Lysander was killed at the Battle of Haliartus. When Pausanias arrived rather than avenge the defeat he simply sought a truce to bury the bodies. For this Pausanias was prosecuted, this time successfully