a federation of ancient Greek city-states. Founded circa 320 B.C., the league originally included only Aetolian cities, but from the middle of the third century B.C., it embraced cities in central and northern Greece and the Peloponnesus. The supreme body of the league was the general assembly, which was convened once a year. Presiding over the assembly and handling administrative work was a strategos. The Aetolian League was conquered by Rome in 189 B.C..