The end of Vietnam War forced ethnic minorities, mostly in the south, to face forced Vietnamization, or to give up. FULRO became a united force for almost every ethnic minorities of Southern Vietnam against the Vietnamese, composed both Khmers, Chams, Degars and Hmongs (mostly Hmong Christians). The level of insurgency against unified Vietnam came tenser at 1980s after the Vietnamese invasion of Cambodia, received arms and ammunitions against the Vietnamese forces. Cambodians, majority of ethnic Khmers, whom suffered previous discrimination and Vietnamization process, also attempted to resist Vietnamization. Both these resistances eventually ended in complete failure at 1990s, as Vietnam enacted Đổi mới reforms and normalization of relations between Vietnam to China and the West, who used to support de-Vietnamization process. The normalization of relations allowed Vietnam to be free on ongoing Vietnamization process.