245 BCE

Approximate date – Callimachus produces the Pinakes, a subject index to the Library of Alexandria. Babylon and Susa fall to the Ptolemaic armies of Ptolemy III. Following a long engagement, Ptolemy III marries Berenice II, the daughter of Magas, king of Cyrene; thereby reuniting Egypt and Cyrenaica.

Geopolitics & Diplomacy

Aratus of Sicyon is elected general (strategos) of the Achaean League.source
Following a long engagement, Ptolemy III marries Berenice II, the daughter of Magas, king of Cyrene; thereby reuniting Egypt and Cyrenaica.source

Conflict & Security

The Qin general Pao Gong captures the Wei city of Juan.source
Babylon and Susa fall to the Ptolemaic armies of Ptolemy III.source
The Zhao general Lian Po captures the Wei city of Fanyang.source

Science & Discovery

Approximate date – Callimachus produces the Pinakes, a subject index to the Library of Alexandria.source

Births

Hasdrubal Barca, Carthaginian general and Younger brother of Hannibal (d. 207 BC)source

Deaths

Apollonius of Rhodes, Greek poet, grammarian, and author of the Argonautica, an epic in four books on the voyage of the Argonauts (b. c. 295 BC)source
After the death of his nephew, Alexander of Corinth, Antigonus II gives Nicaea, Alexander's widow, to his son Demetrius in marriage. Through this action, Antigonus II regains Corinth which has been independent while under the rule of Alexander of Corinth.source