Even his conquest of Macedonia has not come down to us in any connected narrative, and we can only guess the connection. Macedonia was overcome by Gauls, and had no legitimate ruler, Antipater being only a usurper. Antigonus must have come by sea, and have offered himself as king to the Macedonians. After he was landed and was encamped near Lysimachia, he came in contact with the Gauls, who were in possession of the open country. While still encamped on the coast, he tried to conclude peace with them; but they were as faithless as they were uncivilised, and at the most critical moment he learned that they were treacherously marching against him. Abandoning his camp, he withdrew to his ships, while a part of his army remained concealed in a forest; they then fell upon his camp, intoxicated themselves, and when they, engaged in plunder, had fallen into disorder, and were overladen with food and drink, Antigonus attacked and defeated them. This victory at once raised him very high in public estimation, and gained for him great repute. He then conquered Antipater, and established himself as king of Macedonia, though assuredly not of Macedonia in its whole extent. The interior at first did not belong to him, and was still occupied by the Gauls.
To Macedonia he was a very beneficent ruler, and he showed himself to be an extremely prudent, thoughtful, and resolute character.
At the very beginning of his reign there occurred a war, which Antigonus, for the recovery of Macedonia, carried on against Apollodorus, the tyrant of Cassandrea, a man whose name is interesting at a time when Greek history cannot point to any other person of importance.
This was the first success of Antigonus, and he also extended his dominion in Greece; but the Athenians maintained themselves against him.
Pyrrhus then returned from Italy after an absence of seven years; he was highly indignant at Antigonus, of whom he had demanded assistance against Italy, and who had imprudently refused it. Antigonus went to meet Pyrrhus as far as the passes of the Aous—where afterwards Antigonea was founded. Pyrrhus defeated him in a battle of some importance; during his retreat, the Gauls who were to protect Antigonus were nearly all cut to pieces, and the Macedonian phalanx, deserting Antigonus, proclaimed Pyrrhus king. Pyrrhus was thus, for a time, king of Macedonia, and Antigonus was confined to a few places on the seacoast, Thessalonica, Cassandrea, and Thessaly.
Pyrrhus now marched into Greece, and perished at Argos whither Antigonus had followed him with an army.
Antigonus was then stationed in the heart of Peloponnesus with an armed force. He availed himself of the opportunity of making himself master of the peninsula and of constituting it anew according to his own mind. Not being able to place garrisons everywhere, he gave the government in all towns which surrendered to him, to his partisans, and established tyrants who were ready to exert their power for his interests. Hence rebellions sometimes occurred when Antigonus was absent. We may mention particularly the overthrow of Aristotimus of Elis, which was brought about by a heroic conspiracy headed by a childless old man; this is one of the noble occurrences in dying Greece.
THE CHREMONIDEAN WAR
Athens, and Sparta under its king, Areus, were apparently allied with the Ætolians and with king Ptolemy against Antigonus. The friendship which the war of Pyrrhus had brought about between Antigonus and the Spartans, was of short duration; the Antigonids and Ptolemies were and remained mortal enemies, and thus the Spartans, being the allies of Ptolemy, became again involved in a war against Antigonus. We do not know how Athens was drawn into this war, whether she had imprudently formed an alliance with Ptolemy, or whether Antigonus had sought a quarrel with her. But an alliance did exist between Athens and Ptolemy, and an Egyptian fleet was stationed near Attica to support Athens by sea. Attica was cruelly ravaged by incursions from Bœotia, and Athens itself was besieged and often blockaded. This war lasted for many years, and completed the misery of Athens, as much as the siege and conquest of Totila completed the destruction of Rome.
This war in Attica is called the Chremonidean War, because Chremonides, an Athenian, was the soul of it.
We know only very little about this war. Ptolemy sent a fleet under the admiral Patroclus to the assistance of the Athenians; and while he was to land and relieve Athens from the sea side, Areus, with the Spartans and his allies, was to attack the Macedonians and oblige them to raise the siege on the land side. But Areus was too slow. The two parties thus being unable to come to an understanding, returned home without having effected anything. After a very long siege, during which Ptolemy Philadelphus, with all his good intentions, effected nothing, Athens being completely exhausted and helpless, was obliged to capitulate.