Plataea or Plataeae was an ancient city, located in Greece in southeastern Boeotia, south of Thebes. It was the location of the Battle of Plataea in 479 BC, in which an alliance of Greek city-states defeated the Persians.Plataea was destroyed in the Peloponnesian War by Thebes and Sparta in 427 BC and rebuilt in 386 BC. The modern Greek town of Plataies is built near its ruins.Alliance with Athens and presence at MarathonHerodotus tells that, in order to avoid coming under Theban hegemony, Plataea offered to "put themselves into Spartan hands". However, the Spartans refused this offer and, wishing to cause mischief between the Boeotians and Athens, recommended that the Plataeans ally themselves with Athens instead. This advice was accepted and a delegation sent to Athens, where the Athenians were agreeable to such a proposal. On learning that Athens had accepted the alliance, the Thebans sent an army against Plataea, but were met by an Athenian one. Corinth attempted to mediate the dispute, and achieved an agreement that set the border between Thebes and Plataea. In addition, Thebes made a commitment not to interfere with cities that did not want to be a part of a Boeotian state. However, after the Corinthians had left and Athenians were starting their journey home, they were set upon by the Boeotians. In the subsequent battle, the Athenians prevailed and set the river Asopus as the border between Thebes and Plataea.