Vietnamese border raids in Thailand

Vietnamese border raids in Thailand
	Part of the Third Indochina War, Cambodian–Vietnamese War, and the Cold War
Date	1979–1989
Location	Thai–Cambodian border, Gulf of Thailand
Result	Status quo ante bellum Destruction of numerous guerrilla bases and refugee camps along the Thai–Cambodian border; Isolated outbreaks of open hostility between Vietnamese and Thai troops; Withdrawal of Vietnamese troops from the border in 1989;
Belligerents
Vietnam; People's Republic of Kampuchea (1979–89); State of Cambodia (1989)	Thailand; CGDK PDK (Khmer Rouge); KPNLF; FUNCINPEC;
Commanders and leaders
Lê Duẩn; Trường Chinh; Võ Nguyên Giáp; Heng Samrin; Hun Sen	Bhumibol Adulyadej; Prem Tinsulanonda; Chavalit Yongchaiyudh; Son Sann; Son Sen; Pol Pot; Khieu Samphan; Ieng Sary; Nuon Chea; Norodom Sihanouk; Norodom Ranariddh
Strength
200,000–250,000 troops (5th, 9th, and 317th Divisions with armored and artillery units)	120,000–150,000 troops Including Thai border forces and Cambodian factions (Khmer Rouge, KPNLF, FUNCINPEC)
Casualties and losses
Unknown	Thailand: 300–400 killed, 1,000+ wounded Cambodian resistance: ~10,000–15,000 killed, 20,000–30,000 wounded or missing

After the Vietnamese invasion of Cambodia in 1978 and the subsequent collapse of Pol Pot's Democratic Kampuchea regime in 1979, the Khmer Rouge, responsible for the Cambodian genocide, fled into the border regions of Thailand. With assistance from China, Pol Pot's remaining forces regrouped and reorganized in the forested and mountainous zones along the Cambodia–Thailand border.

Throughout the 1980s and early 1990s, Khmer Rouge units operated from within refugee camps situated inside Thai territory, launching cross-border attacks in an effort to destabilize the pro-Hanoi People's Republic of Kampuchea. The Thai government, which refused to recognize the Vietnamese-backed regime in Phnom Penh, tacitly supported anti-Vietnamese resistance movements, including the Khmer Rouge.

This period saw heightened tensions between Thailand and Vietnam, marked by frequent Vietnamese incursions and artillery shelling into Thai territory in pursuit of Cambodian guerrillas who continued to harass Vietnamese occupation forces.