Peace of Antalcidas

The Peace of Antalcidas (387 BC), also known as the King's Peace, was a peace treaty guaranteed by the Persian King Artaxerxes II that ended the Corinthian War in ancient Greece. The treaty's alternate name comes from Antalcidas, the Spartan diplomat who traveled to Susa to negotiate the terms of the treaty with the king of Achaemenid Persia. The treaty was more commonly known in antiquity, however, as the King's Peace, a name that reflects the depth of Persian influence in the treaty, as Persian gold had driven the preceding war. The treaty was a form of Common Peace, similar to the Thirty Years' Peace which ended the First Peloponnesian War.

By 387 BC, the central front of the Corinthian War had shifted from the Greek mainland to the Aegean, where an Athenian fleet under Thrasybulus had successfully placed a number of cities across the Aegean under Athenian control, and was acting in collaboration with Evagoras, the king of Cyprus. Since Evagoras was an enemy of Persia, and many of the Athenian gains threatened Persian interests, these developments prompted Artaxerxes to switch his support from Athens and her allies to Sparta. Antalcidas, the commander of a Spartan fleet, was summoned to Susa, along with the satrap, Tiribazus. There, the Spartans and Persians worked out the form of an agreement to end the war.

To bring the Athenians to the negotiating table, Antalcidas then moved his fleet of 90 ships to the Hellespont, where he could threaten the trade routes along which the Athenians imported grain from the Black Sea region. The Athenians, mindful of their disastrous defeat in 404 BC, when the Spartans had gained control of the Hellespont, agreed to negotiate, and Thebes, Corinth, and Argos, unwilling to fight on without Athens, were also forced to negotiate. In a peace conference at Sparta, all the belligerents agreed to the terms laid down by Artaxerxes.

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