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 (High Priest) the opportunity to outbid Jason and secure for himself the office of high priest. An officer named Sostrates was sent by Antiochus with a troop of Cyprian soldiers to subdue any opposition that might be attempted by the followers of the deposed high priest Jason and to collect at the same time the sum Menelaus had promised. Menelaus' first act was to seize the sacred vessels in the Temple stores in order to meet the obligations he had incurred. This act came to the ears of the deposed high priest Onias III, who publicly accused Menelaus of robbing the Temple.