His whole care was to get Greece free from the Macedonians, and he drove them out from city after city, persuading each to join the Achaian League as it was delivered.  Argos was still under a tyrant named Aristippus, and Aratus made many attempts to turn him out, by his usual fashion of night attacks.  Once he got into the city, and fought there all day, though he was wounded with a lance in the thigh; but he was obliged to retreat at night.  However, he attacked the tyrant when out on an expedition, and slew him, but still could not set Argos free, as the tyrant’s son Aristomenes still held it.