Ptolemy VII becomes king of Egypt briefly, then is assassinated by Ptolemy VIII the following year. Hipparchus determines the length of the tropical year. In the Battle of Antioch, Ptolemy VI Philometor defeats the Seleucid usurper Alexander Balas, but dies in the battle.
Conflict & Security
Ptolemy VII becomes king of Egypt briefly, then is assassinated by Ptolemy VIII the following year.source
In the Battle of Antioch, Ptolemy VI Philometor defeats the Seleucid usurper Alexander Balas, but dies in the battle.source
Science & Discovery
Hipparchus determines the length of the tropical year.source
Births
Sima Qian, Chinese historian (or 135 BC) (d. 86 BC)source