251 BC

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Millennium: 1st millennium BC
251 BC in various calendars
Gregorian calendar 251 BC
Ab urbe condita 503
Ancient Egypt era XXXIII dynasty, 73
- Pharaoh Ptolemy II Philadelphus, 33
Ancient Greek era 132nd Olympiad, year 2
Assyrian calendar 4500
Balinese saka calendar N/A
Bengali calendar −843
Berber calendar 700
Buddhist calendar 294
Burmese calendar −888
Byzantine calendar 5258–5259
Chinese calendar 己酉(Earth Rooster)
2446 or 2386
    — to —
庚戌年 (Metal Dog)
2447 or 2387
Coptic calendar −534 – −533
Discordian calendar 916
Ethiopian calendar −258 – −257
Hebrew calendar 3510–3511
Hindu calendars
 - Vikram Samvat −194 – −193
 - Shaka Samvat N/A
 - Kali Yuga 2850–2851
Holocene calendar 9750
Iranian calendar 872 BP – 871 BP
Islamic calendar 899 BH – 898 BH
Javanese calendar N/A
Julian calendar N/A
Korean calendar 2083
Minguo calendar 2162 before ROC
Nanakshahi calendar −1718
Seleucid era 61/62 AG
Thai solar calendar 292–293
Tibetan calendar 阴土鸡年
(female Earth-Rooster)
−124 or −505 or −1277
    — to —
(male Iron-Dog)
−123 or −504 or −1276

Year 251 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Metellus and Pacilus (or, less frequently, year 503 Ab urbe condita). The denomination 251 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.


By place[edit]


  • Paseas, the tyrant of the Greek city-state of Sicyon, is assassinated by Nicocles, with the acquiescence of the Macedonian king Antigonus II. Nicocles reigns as tyrant of Sicyon for only four months, during which period he drives into exile eighty of the city's citizens. Then the citadel of Sicyon is surprised in the night by a party of Sicyonian exiles, headed by a young nobleman, Aratus. The palace of the tyrant is set on fire, but Nicocles escapes from the city through a subterranean passage.
  • Aratus recalls back to Sicyon those exiled by Nicocles. This leads to confusion and division within the city. Fearing that Antigonus II would exploit these divisions to attack the city, Aratus applies for the city to join the Achaean League, a league of a few small Achaean towns in the Peloponnese. Aratus then gains the financial support of the Egyptian king Ptolemy II to enable the Achaean League to defend itself against Macedonia.

Roman Republic[edit]

  • The Romans, led by Lucius Caecilius Metellus, attack the Carthaginian held port city of Panormus after taking Kephalodon. After fierce fighting in the Battle of Panormus, the Carthaginians, led by Hasdrubal, are defeated and the city falls.
  • With Panormus captured, much of western inland Sicily falls with it. The cities of Ieta, Solous, Petra and Tyndaris agree to peace with the Romans in the same year. This defeat marks the end of significant Carthaginian land-based campaigning in Sicily.