Antigonus was satrap of Phrygia, Lycia, and Pamphylia.
Having been left as overseer of all Asia when Antipater went to Europe, he besieged Eumenes, the satrap of Cappadocia, who had been publicly declared an enemy of the Macedonians. The latter fled and brought Media under his power, but Antigonus afterward captured and killed him. When he returned he was received magnificently
by Seleucus, the satrap of Babylon. One day Seleucus
punished one of the governors without consulting Antigonus, who was present, and the latter became angry and demanded an accounting of his money and possessions. As Seleucus was inferior to Antigonus in power he fled to Ptolemy in Egypt. Thereupon Antigonus removed Blitor, the governor of Mesopotamia, from office, because he allowed Seleucus to escape, and took upon himself the government of Babylon, Mesopotamia, and all the countries from Media to the Hellespont, Antipater having died in the meantime. The other satraps at once became envious of his possession of so large a share of the territory; for which reason chiefly, and at the instance of Seleucus, Ptolemy, Lysimachus, the satrap of Thrace, and Cassander, the son of Antipater and leader of the Macedonians after his father's death, entered into a league with each other. They sent a joint embassy to Antigonus and demanded that he should share with them and with the other Macedonians who had lost their satrapies, his newly acquired lands and money. Antigonus treated their demand with scorn, and they jointly made war against him. Antigonus prepared to meet them. He drove out all of Ptolemy's garrisons in Syria and stripped him of all the possessions that he still retained in Phoenicia and Cœle-Syria.