Editing 309 BC (section)

==== Greece ====
* [[Cassander]], who has held [[Roxana]], widow of [[Alexander the Great]], in prison for a number of years, has her put to death along with her young son Alexander, the nominal King [[Alexander IV of Macedon]].
* [[Antigonus I Monophthalmus|Antigonus]] attempts to renew his alliance with the [[Macedon]]ian general and former regent [[Polyperchon]], who still controls part of the [[Peloponnesus]]. He sends [[Heracles (Macedon)|Heracles]], the illegitimate son of [[Alexander the Great]], to Polyperchon to be treated as a pretender to the throne of Macedonia.
* Polyperchon manages to form an army consisting of 20,000 infantry and 1,000 cavalry and challenges Cassander's army. Instead of fighting, Cassander starts negotiations with Polyperchon. By offering to make him a general of his own army and placing him as governor of Peloponnesus, he convinces Polyperchon to change allegiance to him instead of Heracles. As a result, Polyperchon murders Heracles and his mother [[Barsine]].
* [[Areus I]] succeeds his grandfather [[Cleomenes II]] as king of [[Sparta]].<ref name=Diod2029/>
* A census is carried out in [[Athens]]. 21,000 citizens, 10,000 foreign residents and 400,000 others – women, children and slaves – are living in the city.
* [[Ptolemy I Soter|Ptolemy]] arrives at [[Kos]] and sends for [[Ptolemy (nephew of Antigonus I Monophthalmus)|Ptolemaeus]] (the nephew of [[Antigonus I Monophthalmus|Antigonus]] – who has revolted against Antigonus) to join him to discuss strategy. After finding out Ptolemaeus plans to take over his army and fleet, Ptolemy forces him to commit suicide.<ref name=Diod2027/>