Megapenthes of Sparta was Iphiloche or Echemela. At the death of their father, Megapenthes and his brother or half-brother Nicostratus together seized the throne of Sparta and drove Helen out. They were depicted on the throne in Amyclae riding the same horse. Megapenthes of Sparta In Greek mythology, Megapenthes (; Ancient Greek: Μεγαπένθης "Megapénthēs"), a Spartan prince and son of Menelaus, who ruled after his father's death and sent his mother (or step-mother) Helen into exile. In some legends, Helen was his mother; in most, however, he was Menelaus's son by a concubine, Pieris or Tereis, and was born during the Trojan War.
History of Sparta Peace of Callias. Again the Thebans refused to renounce their Boeotian hegemony, and the Spartan's sent a force under King Cleombrotus in an attempt to enforce Theban acceptance. When the Thebans gave battle at Leuctra, it was more out of brave despair than hope. However, it was Sparta that was defeated and this, along with the death of King Cleombrotus dealt a crushing blow to Spartan military prestige. The result of the battle was to transfer supremacy from Sparta to Thebes. As Spartan citizenship was inherited by blood, Sparta now increasingly faced a helot population that vastly outnumbered its citizens.