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|Millennium:||1st millennium BC|
|397 BC by topic|
|Gregorian calendar||397 BC
|Ab urbe condita||357|
|Ancient Egypt era||XXIX dynasty, 2|
|- Pharaoh||Nepherites I, 2|
|Ancient Greek era||95th Olympiad, year 4|
|Balinese saka calendar||N/A|
|Chinese calendar||癸未年 (Water Goat)
2300 or 2240
— to —
甲申年 (Wood Monkey)
2301 or 2241
|Coptic calendar||−680 – −679|
|Ethiopian calendar||−404 – −403|
|- Vikram Samvat||−340 – −339|
|- Shaka Samvat||N/A|
|- Kali Yuga||2704–2705|
|Iranian calendar||1018 BP – 1017 BP|
|Islamic calendar||1049 BH – 1048 BH|
|Minguo calendar||2308 before ROC
|Thai solar calendar||146–147|
−270 or −651 or −1423
— to —
−269 or −650 or −1422
|Wikimedia Commons has media related to 397 BC.|
Year 397 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Iullus, Albinus, Medullinus, Maluginensis, Fidenas and Capitolinus (or, less frequently, year 357 Ab urbe condita). The denomination 397 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.
- Called on by the Ionians to assist them against the Persian King Artaxerxes II, King Agesilaus II of Sparta launches an ambitious campaign in Asia Minor.
- The Carthaginians establish the town of Lilybaeum in Sicily to replace Motya.
- Himilco crosses to Sicily from Carthage with a fresh army, conquers the north coast, puts Dionysius I, the Tyrant of Syracuse, on the defensive and besieges Syracuse. However, the Carthaginian army again suffers from the plague. The Syracusans counterattack and completely defeat Himilco's army. Himilco has to escape back to Carthagehttps.
- Dionysius II, son of Dionysius I, tyrant of Syracuse (d. 343 BC)
- Antipater, a Macedonian general (d. 319 BC)
- "Antipater - regent of Macedonia". Encyclopedia Britannica. Retrieved 3 December 2017.