In 201 BC, ambassadors from Pergamon and Rhodes brought evidence before the Roman Senate that Philip V of Macedon and Antiochus III of the Seleucid Empire had signed a non-aggression pact. Although some scholars view this "secret treaty" as a fabrication by Pergamon and Rhodes, it resulted in Rome launching the second Macedonian war, with aid from its Greek allies. It was an indecisive conflict until the Roman victory at the Battle of Cynoscephalae in 197 BC. After Rome imposed the Treaty of Tempea, Philip V was forbidden to interfere with affairs outside his borders, a condition he adhered to for the rest of his life. In 194 BC Rome declared Greece "free", and withdrew completely from the Balkans. It seemed that Rome had no further interest in the region.
Macedonian Wars - Wikipedia, the free encyclopedia 