king of Macedon after Alexander the Great, was the son of Antipater. He made many conquests in Greece, abolished democracy at Athens, and intrusted the government of that state to the orator Demetrius. Olympias, the mother of Alexander, having slain Arideius and his wife Eurydice, with many others, Cassander besieged Pydna, whither the queen had retired, took it by stratagem, and caused her to be put to death. He married Thessalonica, the half sister of Alexander the Great; and murdered Roxana and Alexander, the wife and son of that conqueror. Ultimately he formed an alliance with Seleucus, Ptolemy, and Lysimachus against Antigonus and Demetrius, over whom he obtained a decisive victory near Ipsus in Phrygia, B.C. 301. Cassander died of dropsy three years after, in the nineteenth year of his reign. See MACEDONIA.