Perseus, c.212–166 B.C., last king of Macedon (179–168 B.C.), son and successor of Philip V. He intrigued against his younger brother, Demetrius, eventually bringing about the latter's execution by Philip V. As king, his involvement in Greek politics excited the fears of Eumenes II of Pergamum, who, thinking that Pergamum's position was being endangered, went to Rome to provoke war against Perseus by pointing to alignments of Macedon with anti-Roman factions in Greece. The resultant Third Macedonian War (171–168) began with a Macedonian cavalry victory and then dragged on indecisively. Finally Aemilius Paullus took command of the Roman forces and soundly defeated (168) Perseus at Pydna on the Gulf of Thessaloníki. Perseus died in captivity.