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 the decarchs that had been established by Lysander in former states of the Athenian Empire and ordered the former governments restored. The two major powers in the eastern Mediterranean in the 5th century BC had been Athens and Sparta. The defeat of Athens by Sparta resulted in Spartan hegemony in the early 4th century BC. Sparta's close relationship with Cyrus the Younger continued when she gave covert support to his attempt to seize the Persian throne. After Cyrus was killed at the Battle of Cunaxa, Sparta briefly attempted to be conciliatory towards Artaxerxes, the Persian king. In late 401 BC,