He succeeded his father, Philip V, who for his last years had generally supported the Romans.  
He acceded to the throne in 179 BC, clearing his way by betraying his brother Demetrius.  He succeeded his father, Philip V, who for his last years had generally supported the Romans.  As king of Macedon, though, this man instituted an anti-Roman policy which frightened King Eumenes II of Pergamum, culminating in the Third Macedonian war of 171 to 168 BC, and his own defeat at the Battle of Pydna.  FTP, name this last king of Macedon, who shares his name with the mythological hero who killed Medusa.
He acceded to the throne in 179 BC, clearing his way by betraying his brother Demetrius.  
Perseus