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 Sparta and Persia were given the right to make war on those who did not respect the terms of the treaty. It was to be a very one sided interpretation of autonomy that Sparta enforced. The Boeotian League was broken up on the one hand while the Spartan dominated Peloponnesian League was excepted. Further, Sparta did not consider that autonomy included the right of a city to choose democracy over Sparta's preferred form of government. In 383 BC an appeal from two cities of the Chalkidice and of the King of Macedon gave Sparta a pretext to break up the