Cleomenes III
Polybius and Plutarch, a Greek author writing under the Roman empire, cite a battle at Mt. Lykaion in 227 BC between the Achaean League under Aratus and the Spartans under Cleomenes III. Although the details are vague, both authors make it clear that the Achaeans were defeated and that Aratus was believed (mistakenly) to have been killed.