Because the mountainous region is totally on the japanese Section of the peninsula, the key rivers have a tendency to flow westwards. Two exceptions are definitely the southward-flowing Nakdong River and Seomjin River.

A few on the commanderies fell or retreated westward within a several decades, although the Lelang Commandery remained like a Centre of cultural and economic Trade with successive Chinese dynasties for four 파라곤 generations. By 313, Goguryeo annexed all the Chinese commanderies.