When Perdiccas died, Antigonus was named his successor, and became governor of all the Eastern province. He no sooner heard that Cassander had murdered Alexander’s family, than he marched westward, intending to avenge the crime.
On his way, Antigonus passed through Syria, the land governed by Seleucus, and asked that ruler how he had spent the money of the kingdom. Seleucus, who had a bad conscience, instead of answering, ran away to Egypt, where he became a friend of Ptolemy.
Then, fearing that they would not be able to fight against Antigonus successfully, these two generals persuaded Cassander, ruler of Macedon, and Lysimachus, ruler of Thrace, to join them.