231 BC

Millennium:	1st millennium BC
Centuries:	4th century BC – 3rd century BC – 2nd century BC
Decades:	260s BC  250s BC  240s BC  – 230s BC –  220s BC  210s BC  200s BC
Years:	234 BC 233 BC 232 BC – 231 BC – 230 BC 229 BC 228 BC

231 BC by topic

Politics

State leaders – Sovereign states

Birth and death categories

Births – Deaths

Establishments and disestablishments categories

Establishments – Disestablishments

231 BC in other calendars

Gregorian calendar	231 BC
Ab urbe condita	523
Armenian calendar	N/A
Assyrian calendar	4520
Bahá'í calendar	-2074–-2073
Bengali calendar	-823
Berber calendar	720
English Regnal year	N/A
Buddhist calendar	314
Burmese calendar	-868
Byzantine calendar	5278–5279
Chinese calendar	己巳年 (2406/2466) — to — 庚午年 (2407/2467)
Coptic calendar	-514–-513
Ethiopian calendar	-238–-237
Hebrew calendar	3530–3531
Hindu calendars
- Vikram Samvat	-174–-173
- Shaka Samvat	N/A
- Kali Yuga	2871–2872
Holocene calendar	9770
Iranian calendar	852 BP – 851 BP
Islamic calendar	878 BH – 877 BH
Japanese calendar
Julian calendar
Korean calendar	2103
Minguo calendar	2142 before ROC 民前2142年
Thai solar calendar	313

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 Macedon, 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 victors.

Roman Republic

• The Romans send envoys to Massilia (modern Marseille, France) to negotiate with the Carthaginian general Hamilcar Barca who is based there.