Chremonidean War

thumb|First stage of the Chremonidean War (267-265 BC), with the campaigns of the Spartan king Areus and the Ptolemaic admiral Patroclus.

The Chremonidean War () (267–261 BC) was fought by a coalition of Greek city-states and Ptolemaic Egypt against Antigonid Macedonia. It ended in a Macedonian victory that confirmed Antigonid control over Greece. The conflict is considered a seminal event in the history of Greece during the Hellenistic period, as it was the last credible effort by the Greek city-states to re-establish their independence.

The Chremonidean War is poorly documented and known mostly through fragmentary accounts by later historians Pausanias and Justin.