Alexander ( son of Polyperchon ) Alexander ( in Greek Αλέξανδρος ; killed 314 BC ) was son of Polyperchon , the regent of Macedonia , and an important general in the Wars of the Diadochi . Alexander obtains and loses Athens . Antipater , on his death ( 319 BC ) , had left the regency to Polyperchon , to the exclusion and consequent discontent of his own son , Cassander . The chief men , who had been placed in authority by Antipater in the garrisoned towns of Greece , were favourable to Cassander , as their patron ' s son , and Polyperchon ' s policy , therefore , was to reverse the measures of Antipater , and restore democracy where it had been abolished by the latter . It was then , in the prosecution of this design , that his son Alexander was sent to Athens , 318 BC , with the alleged object of delivering the city from Nicanor , who by Cassander ' s appointment commanded the garrison placed by Antipater in Munychia . Before his arrival , Nicanor , besides strengthening himself with fresh troops in Munychia , had also treacherously seized the Piraeus . To occupy these two ports himself soon appeared to be no less the intention of Alexander , an intention which he had probably formed before any communication with Phocion , though Diodorus seems to imply the contrary . The Athenians , however , looked on Phocion as the author of the design , and their suspicions and anger being excited by the private conferences of Alexander with Nicanor , Phocion was accused of treason , and , fleeing with several of his friends to Alexander , was by him despatched to Polyperchon . Cassander , arriving at Athens soon after and occupying the Piraeus , was there besieged by Polyperchon with a large force ; but the supplies of the latter being inadequate , he was obliged to withdraw a portion of his army , with which he went to attempt the reduction of Megalopolis , while Alexander was left in command of the remainder at Athens . Here he appears to have continued without effecting anything , till the treaty and capitulation of Athens with Cassander gave the city to the power of the latter . He attests himself in the Peloponnese . When Polyperchon , baffled at Megalopolis , withdrew into Macedonia , his son seems to have been left with an army in Peloponnese , where , as we read in Diodorus , the field was left open to him , and the friends of oligarchy were greatly alarmed by the departure of Cassander into Macedonia on the intelligence of the murder of Philip Arrhidaeus and Eurydice by Olympias , 317 BC . During his absence , Alexander succeeded in bringing over to himself several cities and important places in the Peloponnese ; but , on Cassander ' s return to the south , after crushing Olympias in Macedonia , he in vain attempted to check him by his fortification of the Isthmus of Corinth , for Cassander , passing to Epidaurus by sea , regained Argos and Hermione , and afterwards also the Messenia n towns , with the exception of Ithome . He passes to Cassander . In the next year , 315 BC , Antigonus ( whose ambition and successes in the east had united against him Cassander , Lysimachus , Asander , and Ptolemy ) , among other measures , sent Aristodemus into the Peloponnese to form a league of amity with Polyperchon and Alexander ; and the latter was persuaded by Aristodemus to pass over to Asia for a personal conference with Antigonus . Finding him at Tyre ( Lebanon ) , a treaty was made between them , and Alexander returned to Greece with a present of 500 talents from Antigonus , and a multitude of magnificent promises . Yet , in the very same year , we find him renouncing his alliance with Antigonus , and bribed by the title of governor of the Peloponnese to reconcile himself to Cassander . His death . In the ensuing year , 314 BC , we read of him as engaged for Cassander in the siege of Cyllene , which however was raised by Aristodemus and his Aetolia n auxiliaries . After the return of Aristodemus to Aetolia , the citizens of Dyme , in Achaia , having besieged the citadel , which was occupied by one of Cassander ' s garrisons , Alexander forced his way into the city , and made himself master of it , punishing the adverse party with death , imprisonment , or exile . Very soon after this he was murdered at Sicyon by Alexion , a Sicyonian , leaving the command of his forces to one who proved herself fully adequate to the task , his wife Cratesipolis ( 314 BC ) .