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Calendar year
| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 231 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 231 BC CCXXXI BC |
| Ab urbe condita | 523 |
| Ancient Egypt era | XXXIII dynasty, 93 |
| - Pharaoh | Ptolemy III Euergetes, 16 |
| Ancient Greek era | 137th Olympiad, year 2 |
| Assyrian calendar | 4520 |
| Balinese saka calendar | N/A |
| Bengali calendar | −823 |
| Berber calendar | 720 |
| Buddhist calendar | 314 |
| Burmese calendar | −868 |
| Byzantine calendar | 5278–5279 |
| Chinese calendar | 己巳年 (Earth Snake) 2467 or 2260 — to — 庚午年 (Metal Horse) 2468 or 2261 |
| Coptic calendar | −514 – −513 |
| Discordian calendar | 936 |
| Ethiopian calendar | −238 – −237 |
| Hebrew calendar | 3530–3531 |
| Hindu calendars | |
| - Vikram Samvat | −174 – −173 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2870–2871 |
| Holocene calendar | 9770 |
| Iranian calendar | 852 BP – 851 BP |
| Islamic calendar | 878 BH – 877 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 2103 |
| Minguo calendar | 2142 before ROC 民前2142年 |
| Nanakshahi calendar | −1698 |
| Seleucid era | 81/82 AG |
| Thai solar calendar | 312–313 |
| Tibetan calendar | 阴土蛇年 (female Earth-Snake) −104 or −485 or −1257 — to — 阳金马年 (male Iron-Horse) −103 or −484 or −1256 |
Year 231 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Matho and Maso (or, less frequently, year 523 Ab urbe condita). The denomination 231 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.
Events
By place
Greece
- Demetrius II, king of Macedonia, seeks military help from Agron, king of Illyria, a loosely organized state on the Adriatic coast north of Epirus, against the advancing Aetolians. The Illyrian army routs the Aetolians and returns home as the victor.
Roman Republic
- The Romans send envoys to Massilia (modern Marseille, France) to negotiate with the Carthaginian general Hamilcar Barca who is based there.
Births
- Hieronymus, tyrant of Syracuse (d. 214 BC)
- Han Xin, prominent Chinese general of the early Han dynasty is born.
Deaths
- Agron, king of the Ardiaean Kingdom (Western Balkans)