Cardia
Çanakkale Province, Turkey
Cardia or Kardia (K), anciently the chief town of the Thracian Chersonese (today Gallipoli peninsula), was situated at the head of the Gulf of Melas (today the Gulf of Saros). It was originally a colony of the Milesians and Clazomenians; but subsequently, in the time of Miltiades (late 6th century BC), the place also received Athenian colonists, as proved by Miltiades tyranny (515–493 BC). But this didn't make Cardia necessarily always pro-Athenian.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).