Alexander (Greek: Αλέξανδρος; killed 314 BC) was a son of Polyperchon, the regent of Macedonia, and an important general in the Wars of the Diadochi.
The friends of oligarchy were greatly alarmed by the departure of Cassander to Macedonia following the murder of Philip Arrhidaeus and Eurydice by Olympias during 317 BC.
[11] In the next year, 315 BC, Antigonus (whose ambition and successes in the east had united Cassander, Lysimachus, Asander, and Ptolemy against him), sent Aristodemus into the Peloponnese to form an alliance with Polyperchon and Alexander.
In 313 BC, after winning the allegiance of the Aetolian League, Aristodemus of Miletus (Antigonus' general and top diplomat in mainland Greece) crossed over into the Peloponnese at the head of a mercenary army, and raised the siege.
Alexander decided to intervene, he marched on the city and forced his way in, made himself master of it, punishing the inhabitants who had imposed him with death, imprisonment, or exile.
Soon after this he was murdered at Sicyon by Alexion, a Sicyonian, leaving the command of his forces to his wife Cratesipolis who proved herself fully adequate to the task.