Centuries: 4th century BC - 3rd century BC - 2nd century BC
- Faced with a dangerously small number of Spartan citizens, and other handicaps to the city-state, Cleomenes III issues revolutionary reforms: cancels debts, redistributes lands, makes citizens of perioeci and metics.
- Antigonus III Doson assumes the title of king of Macedonia.
- Sicily and Sardinia become provinces of Rome; Gaius Flaminius is Rome's first governor of Sicily.
- In Rome, the number of praetors is increased from two to four.