Timeline Chronology: III century BCE
Ancient history
300 BCE
- Tyranny of Lachares at Athens
298 BCE
- Death of Cassander
297 BCE
- Zipoites, king of Bithynia
294 BCE
- Demetrius takes Athens for the second time
- Demetrius, king of Macedonia
288 BCE
- Pyrrhus and Lysimachus, kings of Macedonia
285 BCE
- Ptolemy I associates his son Ptolemy II on the throne of Egypt
284 BCE
- Lysimachus, king of Macedonia
283 BCE
- Death of Demetrius
282 BCE
- Death of Ptolemy I
- Revolt of Magas in Cyrene against Ptolemy II
280 BCE
- Wars of succession in Syria
274 BCE
- First Syrian War
270 BCE
- Hieron II, king of Syracuse
269 BCE
- Chremonidean War against Antigonus Gonatas
263 BCE
- Death of Philetaerus
- Eumenes I controls Pergamon
- Athens under Macedonian rule
260 BCE
- Second Syrian War
251 BCE
- War of Antigonus Gonatas against Alexander and the Achaean League
246 BCE
- Death of Antiochus II and Ptolemy II
- Seleucus II becomes king of Syria
- Ptolemy III becomes king of Egypt
- Third Syrian War, or the Laodicean War
245 BCE
- Andragoras king of Parthia
243 BCE
- Reforms of Agis IV at Sparta
241 BCE
- Death of Eumenes I of Pergamon
- Attalus I controls Pergamon
- Attalus I king of Pergamon
239 BCE
- Demetrius II, king of Macedonia
- War of the Brothers (Seleucus II and Antiochus Hierax)
238 BCE
- Arsaces king of the Parni (Parthians)
235 BCE
- Reforms of Cleomenes III at Sparta
- Diodotus II founds the Greco-Bactrian kingdom
229 BCE
- Death of Demetrius II
- Philip V becomes king of Macedonia under the regency of Antigonus Doson
- liberation of Athens
228 BCE
- Cleomenean War
226 BCE
- Death of Antiochus Hierax
- death of Seleucus II
- Seleucus III becomes king of Syria
223 BCE
- Death of Seleucus III
- Antiochus III becomes king of Syria
222 BCE
- Death of Ptolemy III
- Ptolemy IV becomes king of Egypt
221 BCE
- Death of Antigonus Doson
- Philip V, king of Macedonia
220 BCE
- Social War ('War of the Allies') and Peace of Naupactus
219 BCE
- Fourth Syrian War
216 BCE
- Campaign of Antiochus III in Asia Minor
215 BCE
- First Macedonian War
212 BCE
- Campaign of Antiochus III in the eastern satrapies
204 BCE
- Death of Ptolemy IV
- Ptolemy V becomes king of Egypt
202 BCE
- Fifth Syrian War