Cleomenes III
Cleomenes III ascended the throne of Sparta in 236 BC or 235 BC, after deposing his father, Leonidas II. His accession to power ended a decade-long period of heightened conflict between the two royal families. Sparta's ancient dual kingship was explained by the founding legend that the original conquerors of Sparta were twin brothers and their descendants shared Sparta. During the turmoil, Leonidas II had executed his rival king, the reformist Agis IV.