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|Millennium:||1st millennium BC|
|392 BC by topic|
|Gregorian calendar||392 BC|
|Ab urbe condita||362|
|Ancient Egypt era||XXIX dynasty, 7|
|- Pharaoh||Hakor, 2|
|Ancient Greek era||97th Olympiad (victor)¹|
|Balinese saka calendar||N/A|
|Chinese calendar||戊子年 (Earth Rat)|
2305 or 2245
— to —
己丑年 (Earth Ox)
2306 or 2246
|Coptic calendar||−675 – −674|
|Ethiopian calendar||−399 – −398|
|- Vikram Samvat||−335 – −334|
|- Shaka Samvat||N/A|
|- Kali Yuga||2709–2710|
|Iranian calendar||1013 BP – 1012 BP|
|Islamic calendar||1044 BH – 1043 BH|
|Minguo calendar||2303 before ROC|
|Thai solar calendar||151–152|
−265 or −646 or −1418
— to —
−264 or −645 or −1417
Year 392 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Poplicola and Capitolinus (or, less frequently, year 362 Ab urbe condita). The denomination 392 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- The Persian general, Struthas is dispatched by King Artaxerxes II to take command of the satrapy of Sardis, replacing Tiribazus, and to pursue an anti-Spartan policy.
- The Spartans dispatch an ambassador, Antalcidas, to the Persian satrap Tiribazus, hoping to turn the Persians against the allies by informing them of Conon's use of the Persian fleet to begin rebuilding the Athenian empire. Learning of this, the Athenians send an embassy led by Conon to present their case to the Persians at Sardis. Alarmed by Conon's actions, Tiribazus arrests him, and secretly provides the Spartans with money to equip a fleet. Although Conon quickly escapes, he dies in Cyprus without returning to Athens.
- A peace conference between the Greek city-states is held in Sparta. Andocides, Athenian orator and politician, goes with three colleagues to negotiate peace with Sparta. The conference is unsuccessful and Athens rejects the terms and exiles the ambassadors.
- Dionysius I of Syracuse, having increased his power over the native Sicilians (Sicels), is now attacked by a second Carthaginian expedition. He is forced to ally himself with the Sicels. The Carthaginian army, under Mago, is defeated, makes peace, and returns to Carthage. The treaty with Carthage is advantageous to Dionysius.
- Conon, Athenian general (approximate date)