A location described in classical writing, inhabited from about the 10th century BC by the Illyrians, consisting of the northwestern part of the Balkan Peninsula. West of the Vardar and Morava valleys, south of the Roman province of Pannonia and west of Moesia, at its height Illyria extended from the Danube River southward to the Adriatic Sea and from there eastward to the Sar Mountains. The Illyrians, descendants of the Hallstatt culture, were divided into tribes, each a self-governing community with a council of elders and a chosen leader. The last and best-known Illyrian kingdom had its capital at Scodra (modern Shkodër, Albania). One of its most important rulers was King Agron (second half of the 3rd century BC), who, in alliance with Demetrius II of Macedonia, defeated the Aetolians (231).