 Under Pheidon, Argos regained sway over the cities of the Argolid and challenged Sparta’s dominance of the Peloponnese.Spartan dominance is thought to have been interrupted following the Battle of Hyssiae in 669-668 BC, in which Argive troops defeated the Spartans in a hoplite battle.During the time of its greatest power, the city boasted a pottery and bronze sculpturing school, pottery workshops, tanneries and clothes producers.