Cassander in Harpers Dictionary of Classical Antiquities
（Κάσσανδρος). The son of Alexander's general, Antipater. His father, on his death-bed (B.C. 319), appointed Polysperchon regent, and conferred upon Cassander only the secondary dignity of chiliarch. Being dissatisfied with this arrangement, Cassander strengthened himself in various ways that he might carry on war with Polysperchon. First, he formed an alliance with Ptolemy and Antigonus, and next defeated Olympias and put her to death. Afterwards he joined Seleucus, Ptolemy, and Lysimachus in their war against Antigonus. This war was, on the whole, unfavourable to Cassander. In 306, Cassander took the title of king, when it was assumed by Antigonus, Lysimachus, and Ptolemy. But it was not until the year 301 that the decisive battle of Ipsus secured Cassander the possession of Macedonia and Greece. Cassander died of dropsy in 297, and was succeeded by his son Philip.
Cassander in Wikipedia
Cassander (Greek: Κάσσανδρος , Kassandros Antipatros; ca. 350 - 297 BC), King of Macedonia (305 - 297 BC), was a son of Antipater, and founder of the Antipatrid dynasty.
Cassander is first recorded as arriving at Alexander the Greatís court in Babylon in 323 BC, where he had been sent by his father, Antipater, likely to help uphold Antipaterís regency in Macedon, although a later contemporary suggestion hostile to the Antipatrids was that Cassander had journeyed to poison the King.
Whatever the truth of this suggestion, Cassander certainly proved to be singularly noted amongst the diadochi in his hostility to AlexanderĎs memory. Alexander IV, Roxanne, and Alexanderís supposed illegitimate son Heracles would all be executed on his orders, and a guarantee to Olympias to spare her life was not respected. So too, Cassander would restore Thebes, which had been destroyed under Alexander. This gesture was perceived at the time to be a snub to the deceased King. It was even said that he could not pass a statue of Alexander without feeling faint. Cassander has been perceived to be ambitious and unscrupulous, and even members of his own family were estranged from him. He was taught by philosopher Aristotle at the Lyceum in Greece.
As Antipater grew close to death in 319 BC, he transferred the regency of Macedon not to Cassander, but to Polyperchon, possibly so as not to alarm the other diadochi through an apparent move towards dynastic ambition, but perhaps also because of Cassanderís own ambitions. Cassander rejected his fatherís decision, and immediately went to court Antigonus, Ptolemy and Lysimachus as allies. Waging war on Polyperchon, Cassander would destroy his fleet, put Athens under the control of Demetrius of Phaleron, and declare himself Regent in 317 BC. After Olympiasí successful move against Philip III later in the year, Cassander would besiege her in Pydna. When the city fell two years later, Olympias was killed, and Cassander would have Alexander IV and Roxanne confined at Amphipolis.
Cassander associated himself with the Argead dynasty by marrying Alexanderís half-sister, Thessalonica, and had Alexander IV and Roxanne executed in either 310 BC or the following year. Certainly, in 309, Polyperchon would begin forwarding the claims of Heracles as the true heir to the Macedonian inheritance, at which point Cassander bribed him to have the boy killed. After this, Cassanderís position in Greece and Macedonia was reasonably secure, and he would proclaim himself King in 305 BC. After the Battle of Ipsus in 301 BC, in which Antigonus was killed, he was undisputed in his control of Macedonia. However, he had little time to savour the fact, dying of dropsy in 297 BC.
Cassanderís dynasty did not live much beyond his death, with his son Philip dying of natural causes, and his other sons Alexander and Antipater becoming involved in a destructive dynastic struggle along with their mother. When Alexander was ousted as joint king by his brother, Demetrius I took up Alexander's appeal for aid and ousted Antipater, killed Alexander, and established the Antigonid dynasty. The remaining Antipatrids such as Antipater Etesias would prove unable to re-establish the Antipatrids on the throne.
Of more lasting significance was Cassanderís refoundation of Therma into Thessalonica, naming the city after his wife. Cassander also founded Cassandreia upon the ruins of Potidaea.
Cassander as a fictional character
* Mary Renault refers to Cassander in the Alexander Trilogy by his Greek name, Kassandros, and depicts him highly negatively. In Funeral Games, he is the villain of the piece.
* In the Oliver Stone film Alexander, he is portrayed by Jonathan Rhys Meyers.