323 BC – Ptolemy was born.
318 BC – His first occupation of Syria and he established at the same time a protectorate over the petty kings of Cyprus.
312 BC – Ptolemy and Seleucus, the fugitive satrap of Babylonia, both invaded Syria, and defeated Demetrius Poliorcetes, the son of Antigonus, in the Battle of Gaza.
324 BC – At the Susa marriage festival, Alexander had him marry the Persian princess Atacama.
323 BC – When Alexander died, Ptolemy is said to have instigated the resettlement of the empire made at Babylon.
321 BC – Perdiccas invaded Egypt. Ptolemy decided to defend the Nile, and Perdiccas’s attempt to force it ended in fiasco, with the loss of 2000 men.
295 BC – 294 BC – He lost what he held in Greece, but reconquered Cyprus. Cyrene, after a series of rebellions, was finally subjugated about 300 and placed under his stepson Magas.
285 BC – Ptolemy abdicated in favour of one of his younger sons by Berenice – Ptolemy II Philadelphus, who had been co-regent for three years.
283 BC – Ptolemy I Soter died at the age of 84. Shrewd and cautious, he had a compact and well-ordered realm to show at the end of forty years of war.