307 BC

Millennium:	1st millennium BC
Centuries:	5th century BC 4th century BC 3rd century BC
Decades:	320s BC 310s BC 300s BC 290s BC 280s BC
Years:	310 BC 309 BC 308 BC 307 BC 306 BC 305 BC 304 BC

307 BC in various calendars

Gregorian calendar	307 BC CCCVII BC
Ab urbe condita	447
Ancient Egypt era	XXXIII dynasty, 17
- Pharaoh	Ptolemy I Soter, 17
Ancient Greek era	118th Olympiad, year 2
Assyrian calendar	4444
Balinese saka calendar	N/A
Bengali calendar	−899
Berber calendar	644
Buddhist calendar	238
Burmese calendar	−944
Byzantine calendar	5202–5203
Chinese calendar	癸丑年 (Water Ox) 2391 or 2184     — to — 甲寅年 (Wood Tiger) 2392 or 2185
Coptic calendar	−590 – −589
Discordian calendar	860
Ethiopian calendar	−314 – −313
Hebrew calendar	3454–3455
Hindu calendars
- Vikram Samvat	−250 – −249
- Shaka Samvat	N/A
- Kali Yuga	2794–2795
Holocene calendar	9694
Iranian calendar	928 BP – 927 BP
Islamic calendar	957 BH – 955 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2027
Minguo calendar	2218 before ROC 民前2218年
Nanakshahi calendar	−1774
Seleucid era	5/6 AG
Thai solar calendar	236–237
Tibetan calendar	阴水牛年 (female Water-Ox) −180 or −561 or −1333     — to — 阳木虎年 (male Wood-Tiger) −179 or −560 or −1332

Year 307 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Caecus and Violens (or, less frequently, year 447 Ab urbe condita). The denomination 307 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

Babylonia

• Antigonus makes peace with Seleucus, who is left free to consolidate his empire in the east.

Syria

• Antigonus founds the city of Antigoneia on the Orontes intended to become his eastern capital.

Asia Minor

• Antigonus prepares an expedition to Greece under his son Demetrius. They gather a fleet of 250 ships and a large army in western Asia Minor. Antigonus gives his son 5.000 talents and some of his top officers, chief among them Medius of Larissa and Aristodemus of Miletus.

Greece

• At the beginning of June (the 26th day of the Attic month of Thargelion: Plut. Dem. 8,3) Demetrius, son of Antigonus, launches a surprise attack on Pireaus, Athens' harbour, his forces are able to secure control of the entire port city, except the fortress on the Mounychia which remains in the hands of Dionysius, the commander of Cassander's garrison in Athens.
• Demetrius of Phalerum, who ruled Athens for 10 years with the support of Cassander, recognizes his possition has become untenable. He opens up negotiations, and after several diplomatic exchanges involving Aristodemus of Miletus, Antigonus top diplomat, he is given safe conduct to Thebes. Eventually he settles in Alexandria
• Demetrius captures the fortress on the Mounychia and razes it to the ground. The old democracy, with the old constitution, is re-establishes in Athens under the leadership of Stratocles and Demochares. The grateful Athenians honour Antigonus and Demetrius as divine saviours (theoi soteres).
• Demetrius captures Megara and there he restores the old constitution as well.
• Antigonus gives Athens control of the island of Lemnos and Imbros.
• Upon becoming ruler of Epirus, Pyrrhus allies himself with his brother-in-law, Demetrius and through him with Antigonus.

Sicily

• The tyrant of Syracuse, Agathocles, is forced to return to Syracuse to deal with growing unrest in his Sicilian dominions. Agathocles' expeditionary army, that remain behind in Africa, near Carthage, is soon destroyed.
• The Carthaginian general Hamilcar fails to take Syracuse and is captured and killed.
• The city of Segesta in Sicily is destroyed by Agathocles.

China

• The Chinese King Wuling of Zhao reforms the military of the State of Zhao by putting more emphasis on cavalry over charioteers.

By topic

Philosophy

• Epicureanism, a system of philosophy based upon the teachings of Epicurus, is founded (approximate date).