Cambodia–Vietnam relations

Cambodian-Vietnamese relations

Cambodia	Vietnam

Cambodia–Vietnam relations take place in the form of bilateral relations between the Kingdom of Cambodia and the Socialist Republic of Vietnam. The countries have shared a land border for the last thousand years and share more recent historical links through being part of the French colonial empire. Both countries are members of the Association of Southeast Asian Nations (ASEAN).

The Vietnamese and Khmer languages are distant cousins which diverged from the Proto-Mon–Khmer language approximately three thousand years ago. Vietnamese society, which began in the Red River Delta south of China, was heavily Sinicized while Khmer society, which was centered around the lower reaches of the Mekong river, was Indianized. During these early periods, the various polities of the two societies did not share a common border. Territorial expansions eventually resulted in the spheres of influence of the growing Vietnamese Dai Viet and the large, well-established Khmer Empire overlapping in the 11th century, leading to centuries of friction and conflict. In the early twelfth century, the Ly successfully repelled an invasion by the Khmer king Suryavarman II.

Much of Vietnam's southward territorial expansion started by the Lý Dynasty and expanded by the Tran dynasty from the 14th century onward came at the expense of Champa which became an increasingly compressed polity. By the 17th century the Vietnamese court encouraged settlers to push into Khmer territories, eventually wresting the Mekong Delta from the Cambodian court. Today, Cambodia shares a 1,137 kilometres long border with Vietnam in the east and southeast.

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