Which peace treaty of 387 BCE is also called the King’s Peace?

The Peace of Antalcidas, concluded in 387 BCE, is also called the King’s Peace.

The agreement ended the Corinthian War, a conflict in which Sparta faced a coalition that included Athens, Thebes, Corinth, and Argos. The treaty was named after the Spartan diplomat and commander Antalcidas, who negotiated with the Persian king Artaxerxes II.

Persia’s authority strongly shaped the settlement. Greek cities in Asia Minor were assigned to the Persian king, while the other Greek cities were declared autonomous. Sparta received the power to enforce the terms, giving it a temporary leadership role in mainland Greek affairs.

The treaty’s “King’s Peace” label reflects the decisive Persian role, not a Persian conquest of all Greece. Sparta accepted Persian influence in Asia Minor in exchange for a settlement that weakened its Greek rivals. The autonomy clause was also used by Sparta selectively, especially when it wished to intervene in other city-states.