Centuries: 4th century BC - 3rd century BC - 2nd century BC
- In the Battle of Sentinum, the Romans under Fabius Rullianus and Publius Decius Mus defeat the Samnites and their Etruscan and Gallic allies, causing the Etruscans, Gauls, and Umbrians to make peace.
- Athens surrenders to Demetrius Poliorcetes.
- Ptolemy I of Egypt begins reconquest of Cyprus.
- Seleucus I acquires Cilicia.
- Lysimachus acquires Ionia.