Seleucus had seventy-two satraps under him, so extensive was the territory over which he ruled. The greater part he had transferred to his son, but he continued to reign over the country which lies between the Euphrates and the sea. The last war that he waged was with Lysimachus, for the possession of Phrygia on the Hellespont. Lysimachus
was defeated and slain in battle. Then Seleucus crossed
the Hellespont in order to possess himself of Lysimacheia, but he was killed by Ptolemy Ceraunus who accompanied him. This Ceraunus was the son of Ptolemy Soter and Euridice, the daughter of Antipater. He had left Egypt from fear, because his father had decided to leave the kingdom to his youngest son. Seleucus had received him as the unfortunate son of his friend, and thus he supported, and took around with himself everywhere, his own murderer.