Vietnamese irredentism
Vietnamese irredentism, also called the Ideology of Greater Vietnam or Baiyue nationalism, is the idea that Vietnam should include lands it historically inhabited or influenced, even if they are now outside today’s borders. The main targets of these claims are Laos, Cambodia, and parts of southern China, in the Baiyue region. The idea draws on the belief that the Vietnamese (also known as Viet or Kinh) are descended from the Baiyue peoples, who once lived across what is now China, Vietnam, and Laos. Over time, some Viet groups migrated south, establishing a homeland in northern Vietnam and southern China, and later expanding into other nearby areas. Vietnamese rulers sometimes pursued a policy of embedding conquered peoples into a shared Vietnamese identity.
Under French rule, the region became French Indochina, and France used divide-and-rule tactics. Still, Vietnam often held greater political and economic influence in Laos and Cambodia than these colonies did in other parts of Indochina. After Vietnam’s wars and the end of French rule, Vietnam tried to extend its influence in Laos and Cambodia through communist governments, and even briefly expanded into Thailand. In 1979, Vietnam fought and then occupied Cambodia for about a decade after the Khmer Rouge invasion, though reform in 1986 shifted Vietnam’s focus inward and toward domestic reforms, reducing its involvement in neighboring countries.
Some Vietnamese nationalists push even broader claims, arguing that parts of southern China should be part of Vietnam based on ancient Baiyue roots. Others have claimed that the early Chinese dynasties themselves originated from Baiyue/Vietnamese origins. These ideas are controversial and are not accepted by all neighbors, but they fuel nationalist sentiment among some groups in Vietnam.
Laos and Cambodia have long been seen as areas where Vietnamese influence is strong. Cambodia has often been the focal point of tension, including during the Cambodian–Vietnamese War, and this history has created lasting friction between the two countries. In Laos, Vietnamese influence and interactions have been continuous, with periods of closer control and periods of resistance by local groups. In the Central Highlands of Vietnam, Montagnard communities faced pressure and rebellion as Vietnamese settlers moved in, helped by French colonial policies, and later by Vietnamese and American actions during the Vietnam War era. This led to ongoing conflict and controversy over minority rights and land use.
The Mekong Delta area has its own complex history. The Khmer Krom people there were traditionally linked to Cambodia, but Vietnamese settlement and demographic growth gradually shifted the region’s control. The Vietnamese state pursued settlement and development in the Delta, sometimes with support from nearby powers, while Cambodians and Khmer groups resisted. This tension contributed to ongoing disputes over territory and identity.
Vietnam’s island claims in the South China Sea—especially the Paracel and Spratly archipelagos—are a notable part of its irredentist narrative. Vietnamese sources trace Hoang Sa (Paracel) back to the 17th century and claim Spratly ties to even earlier times. The 1974 Paracel battle against China and later clashes, such as the Johnson South Reef Skirmish, have helped shape a lasting dispute with China. In the broader region, these claims contribute to nationalist sentiment and continue to influence Southeast Asian security dynamics.
Overall, Vietnamese irredentism blends ancient-root ideologies with modern nationalist politics. It emphasizes historical ties to neighboring lands, ongoing influence in the region, and disputes that remain part of regional tensions today.
This page was last edited on 2 February 2026, at 16:31 (CET).