quality:corruption, structural:reformatting, structural:summarization
Alexander's death

At the division of the provinces (the so-called Partition of Babylon) after Alexander's death in 323 BC, Antigonus held authority over Phrygia, Lycaonia, Pamphylia, Lycia and western Pisidia confirmed by Perdiccas, the regent of the empire. However, he incurred the enmity of Perdiccas by refusing to assist Eumenes to obtain possession of the provinces allotted to him: Paphlagonia and Cappadocia. Leonnatus had left with his army for Greece, leaving Antigonus alone to deal with Cappadocia, a task he apparently could not or would not complete without additional aid. Perdiccas seems to have viewed this as a direct affront to his authority, and led the royal army to conquer the area. From there, Perdiccas turned west towards Phrygia as a provocation toward Antigonus, who escaped with his son Demetrius to Greece, where he obtained the favor of Antipater, the viceroy of Macedonia (321 BC), and Craterus, one of Alexander's top generals. During the First War of the Diadochi, he formed a coalition with Antipater, Craterus and Ptolemy. In 320 BC, Antigonus sailed to and secured Cyprus. The war ended in 320 BC, when Perdiccas was murdered by discontented officers (Seleucus and Antigenes) while unsuccessfully trying to invade Ptolemy's satrapy of Egypt.