Argos was believed that legendary hero Perseus was born here.
In ancient era Argos war first city that invented aspis shield and this shield was why soldier in this city can use the Phalanx formation it made Argos won a war with Sparta and became strongest city-state in Peloponnese region,the Phalanx formation was spreaded to all others city-states of greek after this war ,after that 100 years Argos and Sparta had another war and each city said they won so we called it battle of champions, after that 40 years Sparta won a war against Argos then Sparta killed all men in city to made sure Argos couldn’t fight against Sparta anymore.
Importance of Argos bereaved because they refused to fought against Persian in Greco-Persian