Battle of Plataea
During the Persian Wars, the Sicyonians participated with fifteen triremes in the Battle of Salamis and with 3,000 hoplites in the Battle of Plataea. On the Delphic Serpent Column celebrating the victory Sicyon was named in fifth place after Sparta, Athens, Corinth and Tegea. In September 479 BC a Sicyonian contingent fought bravely in the Battle of Mycale, where they lost more men than any other city.