What happened 246 AD

The Carpi moved through Dacia, crossed the Danube, and emerged in Moesia where they threatened the Balkans. Establishing his headquarters in Philippopolis in Thrace, he pushed the Carpi across the Danube and chased them back into Dacia, so that by the summer of 246, he claimed victory against them, along with the title "Carpicus Maximus".

Antiochus II's son Seleucus II Callinicus came to the throne around 246 BC.

Ptolemy III Euergetes abandoned his predecessors' policy of keeping out of the wars of the other Macedonian successor kingdoms and plunged into the Third Syrian War (246–241 BC) with the Seleucid Empire of Syria.

Ptolemy III Euergetes was the third pharaoh of the Ptolemaic dynasty in Egypt from 246 to 222 BC.

The Zhengguo Canal was completed by Zheng Guo of Qin.

The Library of Alexandria was not affiliated with any particular philosophical school and, consequently, scholars who studied there had considerable academic freedom. They were, however, subject to the authority of the king. One likely apocryphal story is told of a poet named Sotades who wrote an obscene epigram making fun of Ptolemy II for marrying his sister Arsinoe II. Ptolemy II is said to have jailed him and, after he escaped, sealed him in a lead jar and dropped him into the sea.