In 233-2 Philopoemen skilfully evacuated Megalopolis before the attack of Cleomenes III., and distinguished himself at Sellasia (222).
After the retreat of Darius the Scythians made a raid as far as Abydos, and even sent envoys to King Cleomenes III.
The chief result of the embassy was that Cleomenes took to the Scythian habit of drinking his wine neat and went mad therefrom (Herodotus vi.
Athens at once appealed to Sparta to punish this act of medism, and Cleomenes I., one of the Spartan kings, crossed over to the island, to arrest those who were responsible for it.
After the death of Cleomenes and the refusal of the Athenians to restore the hostages to Leotychides, the Aeginetans retaliated by seizing a number of Athenians at a festival at Sunium.
The final blow was struck by King Cleomenes I., who maimed for many years to come the Argive power and left Sparta without a rival in the Peloponnese.
In 227 he was recalled by Cleomenes III., who was then reigning without a colleague, but shortly after his return he was assassinated.
As plenipotentiary in 224 he called in Antigonus Doson of Macedonia, and helped to recover Corinth and Argos and to crush Cleomenes at Sellasia, but at the same time sacrificed the independence of the league.
He did his utmost to bring Cleomenes into disfavour at home.
After several unavailing attempts Aratus contrived to win Argos for the Achaean League (229), in which it remained save during a brief occupation by the Spartans Cleomenes III.