Anyone familiar with ancient Greek history has probably noticed that, during the classical era, five cities name tend to come again and again as important players of the different conflicts opposing the city states to one another. Athens, Sparta, Thebes, Corinth and Argos where truly at the center of the geopolitical game of this time and place.
The three first cities all enjoyed period during witch they seemed able to establish their hegemony over Greece for good.
At the head of the Delian League Athens had once seemed to tower far above any of her Greek rivals and, some setbacks withstanding, to be only gaining in strength before the Peloponesian War ended her dream of hegemony over Helas.
Athens defeat was Sparta victory, as now first Greek power over land and sea, she seemed to posses all the cards needed to establish her supremacy. Sparta power was not to last, however, as a resurgecent Athens managed to regain her ascendency at sea and her famous hoplites where crused by their former Thebans friends at Leuctra.
Then came the time of Thebes, as her brilliant commander Epaminondas managed to build her a sphere of influence going from Messenia to Thessaly. Only the alliance of Sparta and Athens, once sworn ennemies, and the fortuous death of Epaminondas at Mantinea managed to stop Thebes momentum and open the way for the Rise of Macedon.
Your challenge(s), if you accept it (them), would be to give Corinth and Argos their moment of glory. To craft timeline where periods could be coined Corinthians and Argive hegemonies, just as we speak of Athenian, Spartan and Theban hegemony in OTL. Bonus point if you can have both in one TL.
I assume making Argos do better against Sparta in the archaic age might be the most straightforward way in her case but for Corinth I am truly curious what peoples could come up with
