Eumenes escaped to the fortress of Nora where Antigonus invested him.[6] Leaving the siege of Nora to a subordinate[7] Antigonus marched against the remaining Perdiccans and defeated them at the Battle of Cretopolis.[8] Antigonus's coalition partner, Antipater, died of old age (83 years old) that year and left the regency to Polyperchon. Antigonus did not accept Polyperchon authority and formed a coalition with Cassander, Ptolemy and Lysimachus against the coalition of the new regent.[9] In 318 BC, Antigonus drove Cleitus the White, the satrap of Lydia, out of his satrapy. Cleitus fled to Polyperchon who equipped him with a large fleet and sent him to take command of the Hellespont at the beginning of the summer of 317 BC.[10]