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
Chilonis (wife of Cleombrotus II) year, when Lysander's duty as ephor had finished, Leonidas returned to Sparta and re-installed himself on the throne, with the intention of sentencing his son-in-law to death, but Chilonis prayed her father to commute the penalty to exile and Leonidas satisfied his daughter's wish. At this point Chilonis, instead of remaining in Sparta, as her father was asking her to, preferred going to exile again, this time following her husband Cleombrotus, along with their two children. Chilonis (wife of Cleombrotus II) Chilonis () was a Spartan princess and queen: daughter, wife, sister and grandmother of four different Spartan kings: Leonidas