During this time Sulpicius had established a firm base by the Seman river in Illyria. A force under Lucius Apustius was sent to raid the western border of Macedonia, capturing or razing a number of cities, including Antipatrea and Codrion. Following this expedition, Sulpicius received the allegiance of the Illyrians under Scerdilaidas, the Dardanians under Bato, and the Athamanes under Amynander. The diplomatic efforts of Philip, Sulpicius, and the Athenians centred on the Aetolian League, which seemed inclined to support the Romans but remained neutral at this stage.