V. Shortly after, as the Achæans were making war against the Eleans, Kleomenes was sent to aid the latter, and met with the army of the Achæans returning home, near the mountain called Lykæum. He attacked their forces, and utterly routed them, killing many and capturing numbers of prisoners, so that a report spread throughout Greece that Aratus himself had perished. But Aratus, turning the disaster to good account, immediately after the defeat marched to Mantinea, and as no one expected him, captured the city and placed a strong garrison in it. This completely disheartened the Lacedæmonians, who desired to recall Kleomenes and put an end to the war. Kleomenes now sent to Messene and invited back Archidamus, the brother of Agis, who ought to have been on the throne as the representative of the other royal family, imagining that if there were two kings reigning at Sparta at the same time, the power of the Ephors would be weakened. However, the party who had previously murdered Agis perceived this, and as they feared that if Archidamus returned to Sparta he would make them pay the penalty of their crimes, they welcomed him back and assisted him to make a secret entry into the city, but immediately afterwards assassinated him, either against the will of Kleomenes, as we are told by Phylarchus, or else with his connivance, in consequence of the representations of his friends. They indeed bore the chief blame in the matter, as they were thought to have forced Kleomenes into consenting to the murder. VI. Kleomenes, determined to carry out his designs of reform, now proceeded to bribe the Ephors into sending him out on a new military expedition. He also won over a considerable number of supporters among the citizens by means of the lavish expenditure and influence of his mother Kratesiklea, who, though averse to a second marriage, is said to have married one of the leading men in Sparta in order to further her son's interests.