366 BCCenturies: 5th century BC - 4th century BC - 3rd century BC
- In Persia, satraps of Artaxerxes II begin a revolt that lasts until 358 BC.
- Dion is expelled from Syracuse.
- Plato arrives in Syracuse on Dion's invitation, leaves the next year.
- The Greek city of Thebes captures the city Oropus.
- Athens founds the town of Kos is founded on the island of Kos in the Aegean Sea.