Earlier in 231 BC, after the dissolution of the
Epirote League, the
Aetolian League had requested the city of Medion to join it, but the
Acarnanians refused. The Aetolians decided to take Medion by force, beginning the siege in June. The king of
Macedon Demetrius II Aetolicus, a rival of the Aetolian League, being himself engaged against the
Dardanians, requested
Agron of
Illyria to intervene and help the Acarnanians. A modern historian,
Erich S. Gruen, says that the fact that Demetrius of Macedon had to call the Illyrians to relieve Medion shows that he was incapable of doing so himself. This is supported by another historian, Grainger, who says that Demetrius was preoccupied in northern Macedon in a war against Dardania. As the Illyrians were also at war against the Dardanians, Grainger states it made Agron and Demetrius 'allies'. Polybius, on the other hand, who wrote a contemporary report, simply states that Agron was bribed by Macedon to attack the Aetolians. Polybius possibly wrote this to enforce his previous and later statements that the Illyrians were pirates. ==Battle of Medion==