Throughout Peloponnesus, Antipater purged and remodelled the cities, Argos, Megalopolis, and others, as he had done at Athens; installing in each an oligarchy of his own partisans—sometimes with a Macedonian garrison—and putting to death, deporting, or expelling hostile, or intractable, or democratical citizens. Having completed the subjugation of Peloponnesus, he passed across the Corinthian Gulf to attack the Ætolians, now the only Greeks remaining unsubdued. It was the purpose of Antipater, not merely to conquer this warlike and rude people, but to transport them in mass across into Asia, and march them up to the interior deserts of the empire. His army was too powerful to be resisted on even ground, so that all the more accessible towns and villages fell into his hands. But the Ætolians defended themselves bravely, withdrew their families into the high towns and mountain tops of their very rugged country, and caused serious loss to the Macedonian invaders. Nevertheless, Craterus, who had carried on war of the same kind with Alexander in Sogdiana, manifested so much skill in seizing the points of communication, that he intercepted all their supplies and reduced them to extreme distress, amidst the winter which had now supervened. The Ætolians, in spite of bravery and endurance, must soon have been compelled to surrender from cold and hunger, had not the unexpected arrival of Antigonus from Asia communicated such news to Antipater and Craterus, as induced them to prepare for marching back to Macedonia, with a view to the crossing of the Hellespont and operating in Asia. They concluded a pacification with the Ætolians—postponing till a future period their design of deporting that people—and withdrew into Macedonia; where Antipater cemented his alliance with Craterus by giving to him his daughter Phila in marriage.
Another daughter of Antipater, named Nicæa, had been sent over to Asia not long before, to become the wife of Perdiccas. That general, acting as guardian or prime minister to the kings of Alexander’s family (who are now spoken of in the plural number, since Roxane had given birth to a posthumous son, called Alexander, and made king jointly with Philip Arrhidæus), had at first sought close combination with Antipater, demanding his daughter in marriage. But new views were presently opened to him by the intrigues of the princess at Pella (Olympias, with her daughter Cleopatra, widow of the Molossian Alexander)—who had always been at variance with Antipater, even throughout the life of Alexander—and Cynane (daughter of Philip by an Illyrian mother, and widow of Amyntas, first cousin of Alexander, but slain by Alexander’s order) with her daughter Eurydice. It has been already mentioned that Cleopatra had offered herself in marriage to Leonnatus, inviting him to come over and occupy the throne of Macedonia; he had obeyed the call, but had been slain in his first battle against the Greeks, thus relieving Antipater from a dangerous rival. The first project of Olympias being thus frustrated, she had sent to Perdiccas proposing to him a marriage with Cleopatra. Perdiccas had already pledged himself to the daughter of Antipater; nevertheless he now debated whether his ambition would not be better served by breaking his pledge, and accepting the new proposition. To this step he was advised by Eumenes, his ablest friend and coadjutor, steadily attached to the interest of the regal family, and withal personally hated by Antipater. But Alcetas, brother of Perdiccas, represented that it would be hazardous to provoke openly and immediately the wrath of Antipater. Accordingly Perdiccas resolved to accept Nicæa for the moment, but to send her away after no long time, and take Cleopatra; to whom secret assurances from him were conveyed by Eumenes. Cynane also (daughter of Philip and widow of his nephew Amyntas), a warlike and ambitious woman, had brought into Asia her daughter Eurydice for the purpose of espousing the king Philip Arrhidæus. Being averse to this marriage, and probably instigated by Olympias also, Perdiccas and Alcetas put Cynane to death. But the indignation excited among the soldiers by this deed was so furious as to menace their safety, and they were forced to permit the marriage of the king with Eurydice.
All these intrigues were going on through the summer of 322 B.C., while the Lamian War was still effectively prosecuted by the Greeks. About the autumn of the year, Antigonus (called Monophthalmus), the satrap of Phrygia, detected these secret intrigues of Perdiccas; who, for that and other reasons, began to look on him as an enemy, and to plot against his life. Apprised of his danger, Antigonus made his escape from Asia into Europe to acquaint Antipater and Craterus with the hostile manœuvres of Perdiccas; upon which news, the two generals, immediately abandoning the Ætolian War, withdrew their army from Greece for the more important object of counteracting Perdiccas in Asia.