South China Sea
The South China Sea along the Cham coast connects central Vietnam with the wider maritime routes of Southeast Asia. Sheltered river mouths and coastal anchorages provided places where merchants could meet producers and local rulers. Inland valleys supplied agricultural goods and forest products, while sailing routes carried visitors, ceramics, cloth and other commodities. Monsoon winds encouraged journeys at particular times of year and often required traders to remain in port between seasons.
During the medieval centuries, Cham polities participated in trade linking China, the Malay world and the Indian Ocean. Hindu traditions and later Islamic connections formed part of a culturally varied coast. Vietnamese expansion southwards changed political control as Cham states lost territory and coastal centres. During the early modern period, ports such as Hoi An became important meeting places for Asian and European merchants. Warfare within Vietnam repeatedly affected these connections. In the early nineteenth century, Nguyễn unification brought a new political framework to the coast.