Trojan War was reunited with Menelaus. Proteus also told Menelaus that he was destined for Elysium (Heaven) after his death. Menelaus returned to Sparta with Helen eight years after he had left Troy. Agamemnon returned home with Cassandra to Argos. His wife Clytemnestra (Helen's sister) was having an affair with Aegisthus, son of Thyestes, Agamemnon's cousin who had conquered Argos before Agamemnon himself retook it. Possibly out of vengeance for the death of Iphigenia, Clytemnestra plotted with her lover to kill Agamemnon. Cassandra foresaw this murder, and warned Agamemnon, but he disregarded her. He was killed, either at a feast or in
History of Sparta backing of Egypt. However Aratus, the leader of the Achaean League, decided to ally with Achaea's enemy, Macedonia. With Egypt deciding to cut financial aid Cleomenes decided to risk all on one battle. In the resulting Battle of Sellasia in 222 BC, Cleomenes was defeated by the Achaeans and Macedonia. Antigonus III Doson, the king of Macedon ceremonially entered Sparta with his army, something Sparta had never endured before. The ephors were restored, whilst the kingship was suspended. At the beginning of the Social War in 220 BC, envoys from Achaea unsuccessfully attempted to persuade Sparta to take the field