The Battle of Pydna was fought in 148 BC between Rome and the forces of the Macedonian leader Andriscus. The Roman force was led by Quintus Caecilius Metellus, and was victorious. The battle played an important role in deciding the outcome of the Fourth Macedonian War, and saw the annihilation of the last military-political force of Macedon.
The war had begun when the pretender Andriscus defeated Rome's clients in Macedon and crowned himself king, defeating a Roman force sent to stop him and invading parts of Greece. The senate then sent Quintus Caecilius Metellus with another, larger army to stop the pretender; the Roman commander chose to undertake both a land and sea offensive, forcing Andriscus to take a defensive position near Pydna, where Metellus engaged and soundly defeated him.