Cleomenean War - Early Years and Spartan Success

Early Years and Spartan Success

After fortifying Belbina, Cleomenes advanced into Arcadia with 3,000 infantry and a few cavalry. However, he was called back by the ephors, and this retreat allowed Aratus to seize Caphyae as soon as Cleomenes returned to Laconia. Once this news reached Sparta, the ephors sent Cleomenes out again; he managed to capture the Megalopian city Methydrium before ravaging the territory surrounding Argos.

Around this time, the Achaean League sent an army under a new strategos—Aristomachos of Argos, who had been elected in May 228 BC—to meet Cleomenes in battle. The Achaean army of 20,000 infantry and 1,000 cavalry advanced on the 5,000-strong Spartan army at Pallantium. Aratus, who had accompanied Aristomachos, advised him to retreat because even 20,000 Achaeans were no match for 5,000 Spartans. Aristomachos, listening to Aratus' advice, retreated with the Achaean army.

Meanwhile, Ptolemy III of Egypt, who had been an ally of the Achaean League in their wars against Macedon, shifted his financial support to Sparta. Ptolemy made this decision after calculating that a resurgent Sparta would be a more valuable ally against Macedon than a failing Achaean League.

In May 227 BC, Aratus was once again elected strategos and attacked Elis. The Elians appealed to Sparta for aid; as the Achaeans were returning from Elis, Cleomenes attacked and routed their entire army near Mount Lycaeum. Taking advantage of a rumour that he had been killed during the fighting, Aratus attacked and seized Mantinea.

Meanwhile, the Eurypontid King of Sparta Eudamidas III, son of Agis IV, died. Pausanias, the Greek writer, claims that Cleomenes had him poisoned. In order to strengthen his position against the ephors, who were opposed to his expansionist policy, Cleomenes recalled his uncle Archidamus V from his exile in Messene to ascend the Eurypontid throne, but as soon as Archidamus returned to the city, he was assassinated. Cleomenes' involvement in the plot is unclear, since ancient sources contradict each other: Polybius claims that Cleomenes ordered the murder, but Plutarch disagrees.