Philip V of Macedon - First Macedonian War

First Macedonian War

After the Peace of Naupactus in 217 BC, Philip V tried to replace Roman influence along the eastern shore of the Adriatic, forming alliances or lending patronage to certain island and coastal provinces such as Lato on Crete. He first tried to invade Illyria from the sea, but with limited success. His first expedition in 216 BC had to be aborted, while he suffered the loss of his whole fleet in a second expedition in 214 BC. A later expedition by land met with greater success when he captured Lissus in 212 BC.

In 215 BC, he entered into a treaty with Hannibal, the Carthaginian general then in the middle of an invasion of Roman Italy. Their treaty defined spheres of operation and interest, but achieve little of substance or value for either side. Philip became heavily involved in assisting and protecting his allies from attacks from the Spartans, the Romans and their allies.

Rome's alliance with the Aetolian League in 211 BC effectively neutralised Philip's advantage on land. The intervention of Attalus I of Pergamum on the Roman side further exposed Philip's position in Macedonia.

Philip was able to take advantage of the withdrawal of Attalus from the Greek mainland in 207 BC, along with Roman inactivity and the increasing role of Philopoemen, the strategos of the Achaean League. After sacking Thermum, the religious and political centre of Aetolia, Philip was able to force the Aetolians to accept his terms in 206 BC. The following year he was able to conclude the Peace of Phoenice with Rome and its allies.