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Sino-Vietnamese conflicts (1979–1991)
Part of the Third Indochina War and the Cold War
A Chinese officer reports to his command after a battle against Vietnamese forces on 14 October 1986
Date 16 March 1979–7 November 1991 (12 years, 7 months, 3 weeks and 1 day) Location Sino-Vietnamese border and the Spratly Islands Result Chinese victory The conflict subsided without the outbreak of full-scale war with the advantage belongs to China Normalization of relations between China and Vietnam by retreat of Vietnam from Cambodia and dissolution of the Soviet Union as ally of Vietnam in 1991 Territorial changes Temporary Chinese occupation of several areas within Vietnamese territory in Vị Xuyên District, Hà Giang Province (returned to Vietnam in 1992) Chinese take control of six reefs in the Spratly Islands of the South China Sea
Belligerents
China	Vietnam
Commanders and leaders
Deng Xiaoping Chairman of the CMC (1981–89) Ye Jianying Chairman of the SCNPC (1979–83) Li Xiannian President (1983–88) Yang Shangkun President (1988–91) Yang Dezhi Xu Shiyou	Lê Duẩn General Secretary (1979–86) Trường Chinh General Secretary (1986) Chairman of the CS (1981–87) Nguyễn Văn Linh General Secretary (1986–91) Tôn Đức Thắng President (1979–80) Nguyễn Hữu Thọ President (1980–81) Võ Chí Công Chairman of the CS (1987–91) Văn Tiến Dũng Đàm Quang Trung Vũ Lập
Strength
c. 200,000–400,000	c. 600,000–800,000 (including irregular units)
Casualties and losses
2,000 killed 2,100 injured	4,000 killed 9,000 injured

The Sino-Vietnamese conflicts of 1979–1991 were a long series of border and naval clashes between China and Vietnam following the Sino-Vietnamese War in 1979. These clashes lasted from the end of the Sino-Vietnamese War until the normalization of ties in 1991.

When the Chinese People's Liberation Army (PLA) withdrew from Vietnam in 16 March 1979 after the war, China announced that they were not ambitious for "any square inch of the territory of Vietnam". However, Chinese troops occupied an area of 60 square kilometres (23 sq mi), which was disputed land controlled by Vietnam before hostilities broke out. In some places such as the area around Friendship Gate near the city of Lạng Sơn, Chinese troops occupied territories which had little military value but important symbolic value. Elsewhere, Chinese troops occupied the strategic positions of military importance as springboards to attack Vietnam.

The Chinese occupation of border territory angered Vietnam, and this ushered in a series of border conflicts between Vietnam and China to gain control of the area. These conflicts continued until 1988, peaking in the years 1984–1985. By the early 1990s, along with the withdrawal of Vietnam from Cambodia and the dissolution of the Soviet Union as ally of Vietnam, the relationship between the two countries gradually returned to normality. By 7 November 1991 the two countries officially proclaimed the normalization of their diplomatic relations, thereby ending the border conflicts.

Background

After 1979, there were at least six clashes on the Sino-Vietnamese border in June and October 1980, May 1981, April 1983, April 1984, June 1985, and from October 1986 to January 1987. According to Western observers, all were initiated or provoked by the Chinese to serve political objectives. The imminent threat of another invasion by the northern neighbor impelled Vietnam to build up an enormous defending force. During the 1980s, around 600,000–800,000 Vietnamese regulars and paramilitaries were estimated to have been deployed in frontier areas, confronted by some 200,000–400,000 Chinese troops.

Throughout the conflict, the Vietnamese Vị Xuyên District had been the most violent front. According to cursory examination, seven divisions (the 313th, 314th, 325th, 328th, 354th, 356th, and 411th) and one separate regiment (the 266th/341st) of Vietnamese forces were involved on this battlefield in the mid-1980s. On the Chinese side, armies from seven military regions were rotated through this area to "touch the tiger's butt", a euphemism for obtaining combat experiences given by Chinese paramount leader, Deng Xiaoping. From 1984 to 1989, at least 14 Chinese armies had been substitutionally committed to the fight in the area (1st, 12th, 13th, 14th, 16th, 20th, 23rd, 26th, 27th, 38th, 41st, 42nd, 47th, and 67th).

Besides the use of regular forces, China also armed and trained ethnic resistance groups (especially from the Hmong people) to wage unconventional warfare against the governments of Vietnam and Laos. From 1985, Chinese support for these insurgents began to shrink, as the Laotian government initiated normalization of relations with China.

1980: Shelling of Cao Bằng

Since early 1980, Vietnam had orchestrated military operations during the dry season to sweep Khmer Rouge forces over the Cambodia-Thailand border. To put pressure on Vietnam to withdraw military forces from Cambodia, China had garrisoned several armies along the China-Vietnam border. China also provided military training for some 5,000 anti-Laotian Hmong insurgents in Yunnan Province and used this force to sabotage the Muang Sing area in northwestern Laos near the Sino-Laotian border. Vietnam responded by increasing forces stationed at the Sino-Vietnamese border, and China no longer had the overwhelming numerical superiority as it did in its campaign in February 1979.

In June 1980, the People's Army of Vietnam (PAVN) crossed the Thai–Cambodian border during the pursuit of the defeated Khmer Rouge. Despite swift Vietnamese withdrawal from Thai territory, the Vietnamese incursion made China feel that it had to act to support its allies, Thailand and the Khmer Rouge. From 28 June to 6 July, in addition to outspoken criticism of Vietnam in diplomatic announcements, the Chinese continuously shelled the Vietnamese Cao Bằng Province. Small-scale skirmishes also took place along the border later in the year, with seven incidents occurring in the first half of October. China accused Vietnam of conducting cross-border raids against Chinese positions in the Luojiaping area, Maguan County, Yunnan Province on 30 September and 1 October, killing at least 5 Chinese. The Chinese then replied by an assault against Vietnamese positions in the same area on 15 October, in which they claimed to have killed 42 Vietnamese troops.

The Chinese shelling did not aim at any strategic military target or create any substantial damage in Vietnam. Vietnam felt that the conduct of military operations on a larger scale was beyond Chinese capabilities, and that this gave them a free hand to conduct military operations in Cambodia. The Chinese shelling was indicative of the type of conflict the Sino-Vietnamese border would see for the next 10 years.

1981: Battle of Hill 400 (Battle of Fakashan)

On 2 January 1981, the Vietnamese Ministry of Foreign Affairs proposed a ceasefire during the Lunar New Year festival. While this proposal was rejected by China on 20 January, the two sides continued the exchange of prisoners of war. The situation was relatively calm for the next few months.

In May 1981, ferocious fighting suddenly erupted in Cao Lộc District, Lạng Sơn Province, when the PLA launched a regiment-sized attack against a height known as Fakashan (法卡山) to the Chinese and Hill 400 to the Vietnamese. In Hà Tuyên Province (now Hà Giang and Tuyên Quang Provinces), Chinese forces stormed the strategic peak designated as Hill 1688, or named Koulinshan (扣林山) by the Chinese, and several other positions in its vicinity. Bloody engagements claimed hundreds of lives from each side. The two battles began on 5 and 7 May respectively; the one at Hill 400 persisted until 7 June with a succession of Vietnamese counter-attacks to reclaim the hill. To justify this military operation, China announced that the attacks were in response to acts of aggression by Vietnam during the first quarter of that year.

In retaliation, Vietnamese forces carried out raids against Guangxi Province on 5 and 6 May. A Vietnamese infantry company also struck the Mengdong co-operative commune in Malipo County, Yunnan Province. The Chinese claimed to have fought off these attacks and decimated hundreds of Vietnamese soldiers in Guangxi. On 22 May, they reportedly killed 85 Vietnamese soldiers in Koulin, Yunnan. In total, China claimed the deaths of about 300 Vietnamese soldiers during these border clashes. These numbers did not include losses in the battles at Fakashan and Koulinshan, in which Chinese reports accounted over 1,700 Vietnamese personnel killed or wounded.

Although the conflict raged on, China did not want to escalate and only deployed border guard units instead of regular troops into the battles. Western observers assessed that China was unlikely to teach Vietnam a "lesson" like in 1979, especially when Vietnam had strengthened its regular forces in border areas and had a clear advantage in terms of equipment. Other analysts pointed out that the upcoming rainy season and the recent cuts in its military budget would preclude China's carrying out a large-scale invasion.

1984: Battle of Vị Xuyên (Battle of Laoshan)

From 2 to 27 April 1984, in support of Cambodian rebel forces whose bases were being overrun by the Vietnamese Army during the K5 dry season offensive, China had conducted the heaviest artillery barrage since 1979 against the Vietnamese border region, with 60,000 shells pounding 16 districts in Lang Son, Cao Bang, Ha Tuyen, and Hoang Lien Son Provinces. This was accompanied by a wave of infantry battalion-sized attacks on 6 April. The largest of them took place in Tràng Định District, Lạng Sơn Province, with several Chinese battalions assaulting Hills 820 and 636 near the routes taken during the 1979 invasion at the Friendship Gate. Despite mobilizing a large force, the Chinese were either beaten back or forced to abandon captured positions by the next day. Chinese documents later revealed that the ground attacks primarily served the diversionary objective, with their scales much lower than that reported by Western sources.

In Ha Tuyen from April to July 1984, Chinese forces struck a strip of hills in Vi Xuyen District, named Laoshan (老山) by the Chinese. Laoshan is a string of mountains running from the western Hill 1800 to another hill at the elevation of 1,200 m in the east. This easternmost hill has been referred to by the Chinese as either Dongshan (东山) or Zheyinshan (者阴山), and was also the only position on the eastern bank of the Lô River where fighting occurred.

The PLA launched their assault at 05:00 on 28 April after intense artillery bombardment. The PLA 40th Division of the 14th Army crossed the border section to the west of the Lô River, while the 49th Division (probably from the 16th Army) took Hill 1200 on the eastern bank. The Vietnamese defenders, including the PAVN 313th Division and 168th Artillery Brigade, were forced to retreat from the hills. PLA troops captured the hamlet of Na La, as well as Hills 233, 685 and 468, creating a salient of 2.5 km thrusting into Vietnam. These positions were shielded by steep cliffs covered by dense forests along the Thanh Thuy River, and could only be accessed by crossing through the exposed eastern side of the Lo River valley.

After 28 April, fighting remained continued in other places such as Hills 1509 (Laoshan), 772, 233, 1200 (Zheyinshan) and 1030, over which control constantly changed hands. The battle paused on 15 May, as Chinese forces had virtually secured these hills, but resumed on 12 June and again on 12 July as the PAVN mounted counter-attacks in an attempt to recapture the lost positions. Afterwards, fighting was gradually reduced to sporadic artillery duels and skirmishes. According to U.S. intelligence reports, Vietnamese forces failed to retake the eight hills. As the result, the PLA occupied 29 points within Vietnamese territory, including Hills 1509 and 772 west of Lo River, as well as Hills 1250 and 1030 and Mount Si-La-Ca in the east. Along the 11-kilometer border segment, the deepest Chinese intrusion was made at Hills 685 and 468 located approximately 2 km to the south. However, the Chinese failed to advance any further than 5 km southward, despite their outnumbering force. The heights continued to be contested in a string of later engagements, which lasted until 1986.

To defend the captured area, the PLA stationed two armies in Vi Xuyen region, consisting of four infantry divisions, two artillery divisions, and several tank regiments. Chinese artillery positioned on the hills included 130 mm field guns, 152 mm howitzers, and 40-barrel multiple rocket launchers, while infantry regiments were equipped with 85 mm guns and 100-D mortars. The PLA used tanks in some of the battles.

In June, the Vietnamese claimed to have annihilated one regiment and eight battalions of the PLA, equivalent to about 5,500 Chinese casualties. They raised the number to 7,500 by August. In contrast, the Chinese reported they had inflicted approximately 2,000 casualties on Vietnamese forces, while losing 939 soldiers and 64 laborers killed during the five-week offensive campaign in Laoshan. 1,080–3,000 Vietnamese deaths was additionally claimed by the Chinese after the action on 12 July. The Vietnamese admitted that the PAVN 356th Division alone suffered 600 killed on that day.

1986–87: "Phony war"

In 1985, the Chinese fired more than 800,000 shells into Vi Xuyen of about one million shells targeted at Vietnamese border regions; this activity, however, significantly dropped in the period from 1986 to early 1987, with only several tens of thousands of rounds fired per month. In 1986, General Secretary of the Communist Party of the Soviet Union Mikhail Gorbachev called for the normalization of relations between Vietnam and China in a speech in Vladivostok. In October 1986, China also succeeded in persuading the Soviet Union to conduct negotiations on Cambodia in the ninth round of negotiations between the USSR and China.

However, amid positive diplomatic signals, the situation at the frontier suddenly intensified. On 14 October 1986, Vietnam accused China of firing 35,000 shells into Vi Xuyen and making a territorial encroachment. The Vietnamese also claimed to have repelled three Chinese charges against Hill 1100 and the Thanh Thuy Bridge. This development was possibly a Chinese reaction either to the Soviet Union's refusal to raise pressure on Vietnam to withdraw from Cambodia, or to Vietnamese plans for military activity in Cambodia during the dry season. In January 1987, China had fired some tens of thousands of shells (60,000 shells on 7 January alone) and launched 15 division-sized attacks against Vietnamese positions on Hills 233, 685, 1509, and 1100. Vietnam put the number of Chinese casualties in these attacks at 1,500. The Chinese, on the other hand, claimed to have inflicted 500 casualties on the Vietnamese; they also denied the Vietnamese claim, but admitted that Chinese forces had suffered "considerable losses". On 5 October 1987, a MiG-21 fighter jet of the Vietnam People's Air Force was shot down over the Chinese Longzhou County, Guangxi Province.

According to Carlyle A. Thayer, this wave of fighting had the nature of a "phony war". Despite heavy clashes in Vi Xuyen, the situation in other border provinces was relatively calm, and the Chinese did not deploy any of their regular units into the fight. The order of battle of both sides remained unchanged during this period of the conflict.

1988: Johnson South Reef Skirmish

On 14 March 1988, a naval battle was fought between the Vietnam People's Navy and the People's Liberation Army Navy within the Spratly Islands. The battle saw at least 64 Vietnamese soldiers killed and 3 Vietnamese naval vessels lost, while only one Chinese soldier was wounded in return. The battle resulted in Chinese control over the Johnson South Reef. Five other reefs in the Spratly Islands were also occupied by China in the same year.

Aftermath

During the 5-year period from 1984 to 1989, the Chinese had fired over 2 million artillery rounds in Ha Giang Province, mainly in the area of 20 square kilometres (7.7 sq mi) of Thanh Thuy and Thanh Duc Communes. The situation was quiet at the town of Hà Giang, 10 miles south of the battle sites, without any considerable barrage.

From April 1987, the PLA began to scale down their military operations, yet still routinely patrolled the Laoshan and Zheyinshan areas. From April 1987 to October 1989, they conducted only 11 attacks, mostly artillery strikes. By 1992, China had formally pulled out its troops from Laoshan and Zheyinshan. The withdrawal had been gradually carried out since 1989. Atop Laoshan, the Chinese built concrete bunkers and a memorial after the conflict. Only earthen structures remained on the Vietnamese sector, which has been delineated and returned to Vietnam under the 2009 Border Agreement between the two countries. China and Vietnam negotiated the normalization of their relations in a secretive summit in Chengdu in September 1990 and officially normalized ties in November 1991 before the fall of Soviet Union as ally of Vietnam.

Thousands of people from both sides were killed in these border clashes. At the military cemetery in Vị Xuyên, there are more than 1,600 graves of Vietnamese soldiers killed during the conflict. Vietnam acknowledged 4,000 killed and 9,000 wounded in the area between 1984 and 1989. The Chinese confirmed their corresponding casualty figure as 4,100, including over 2,000 war dead.

References

Citations

1. (in Vietnamese) https://www.bbc.com/vietnamese/vietnam-51645686
2. ^ Li, p. 259.
3. ^ "Chinese Invasion of Vietnam – February 1979". Global Security.org. Retrieved 7 April 2016.
4. Nayan Chanda, "End of the Battle but Not of the War", Far Eastern Economic Review, 16 March 1979, p. 10. Chanda quoted Chinese officials on announcement of withdrawal on 5 March 1979.
5. O’Dowd, p. 91.
6. Nayan Chanda, p. 10. The most symbolic part was a 300-meter section of railroad track between the Friendship Gate and the Vietnamese border post.
7. Joyaux, p. 242.
8. ^ Carlyle A. Thayer, "Security Issues in Southeast Asia: The Third Indochina War", Conference on Security and Arms Control in the North Pacific, Australian National University, Canberra, August 1987.
9. ^ O'Dowd, p. 101.
10. ^ Li, p. 263.
11. O'Dowd, p. 70.
12. Quincy, p. 441.
13. John McBeth, "Squeezing the Vietnamese", Far Eastern Economic Review, 19 December 1980, p. 9.
14. O'Dowd, p. 92.
15. ^ O'Dowd, p. 93.
16. "Armed skirmishes on the border between China and Vietnam...", UPI, 16 October 1980.
17. Zhang, p. 146.
18. O'Dowd, p. 94.
19. ^ Zhang, p. 147.
20. Michael Weisskopf and Howard Simmons, "A Slow Burn on the Sino-Vietnam Border", Asiaweek, 22 May 1981, p. 24.
21. Michael Weisskopf (from Beijing), International Herald Tribune, 25 May 1981.
22. O’Dowd, p. 98.
23. Zhang, p. 151-152.
24. ^ O’Dowd, p. 100.
25. O'Dowd, p. 100, citing from Ziwei Huanji (Counter-Attack in Self-Defence against Vietnam). According to B. P. Mahony, at least three Chinese divisions participated in the attack (B. P. Mahony, "Sino-Vietnamese Security Issues: Second Lesson Versus Stalemate", meeting of the Asian Studies Association of Australia, University of Sydney, 12–16 May 1986). Other sources have identified the PLA 31st Division of the 11th Army as the unit that assaulted Hill 1200. It is possible both divisions were involved. Even if only two Chinese divisions had been present, they would still have outnumbered Vietnamese forces, with about 24,000 Chinese troops against probably 10,000 soldiers of the PAVN 313th Division.
26. B. P. Mahony, "Sino-Vietnamese Security Issues: Second Lesson Versus Stalemate", p. 14.
27. ^ Li, p. 260.
28. "Intelligence", Far Eastern Economic Review, 2 August 1984.
29. Paul Quinn-Judge, "Borderline Cases", Far Eastern Economic Review, 21 June 1984, p. 26
30. The Nation Review, 7 August 1984. Referenced from the Hanoi Radio.
31. Zhang, p. 156.
32. ^ (in Vietnamese) "Hàng nghìn chiến sĩ thương vong ngày cao điểm trận chiến Vị Xuyên", VnExpress, 25 July 2014.
33. The Canberra Times, 6 October 1986. Referenced from the AFP in Beijing.
34. "A Crescendo for Withdrawal", Asiaweek, 2 November 1986, p. 11.
35. Brecher and Wilkenfield, p. 161.
36. O'Dowd, p. 105-106.
37. Zhou Yu, "The Sino-Vietnamese War: A Scar on the Tropic of Cancer", Phoenix Weekly, 5 April 2009, p. 34. Retrieved 6 May 2016.
38. (in Vietnamese) "Hơn 4.000 chiến sĩ hy sinh bảo vệ biên giới Vị Xuyên", VnExpress, 14 July 2016.
39. Zhang, p. 161.

Sources and further reading

• Amer, Ramses. "Cambodia and Vietnam: A troubled relationship." in International Relations in Southeast Asia. Between Bilateralism and Multilateralism (Singapore: Institute of Southeast Asian Studies, 2010): 92-110.
• Brecher, Michael; Wilkenfield, Jonathan (2000). A Study of Crisis. University of Michigan Press. ISBN 0-472-10806-9.

• Garver, John W. China's Quest: The History of the Foreign Relations of the People's Republic (2018) pp 383–400.
• Hood, Steven J. Dragons Entangled: Indochina and the China-Vietnam War (ME Sharpe, 1993).
• Joyaux, François (1994). La Tentation impériale - Politique extérieure de la Chine depuis 1949. Paris: Imprimerie nationale. ISBN 2-11-081331-8.
• Li, Xiaobing (2007). A History of the Modern Chinese Army. The University Press of Kentucky. ISBN 9780813124384.
• McGregor, Charles. "China, Vietnam, and the Cambodian conflict: Beijing's end game strategy." Asian Survey 30.3 (1990): 266-283 online.
• O'Dowd, Edward C. (2007). Chinese Military Strategy in the Third Indochina War: The Last Maoist War. New York: Routledge. ISBN 978-0203088968.
• Path, Kosal. "China's Economic Sanctions against Vietnam, 1975–1978." China Quarterly 212 (2012): 1040-1058 online.
• Path, Kosal. "The Sino-Vietnamese Dispute over Territorial Claims, 1974-1978: Vietnamese Nationalism and its Consequences." International Journal of Asian Studies 8.2 (2011): 189+ online.
• Quincy, Keith (2000). Harvesting Pa Chay's Wheat: The Hmong and America's Secret War in Laos. Eastern Washington University Press. ISBN 978-0-910055-61-1.
• Reddick, Zachary N. "A Sacrifice for Chinese Unity: The Sino-Vietnamese War through Domestic Media." Southeast Review of Asian Studies' 39 (2017).
• Westad, Odd Arne, and Sophie Quinn-Judge, eds. The third Indochina war: conflict between China, Vietnam and Cambodia, 1972-79 (Routledge, 2006).
• Womack, Brantly. "Asymmetry and systemic misperception: China, Vietnam and Cambodia during the 1970s." Journal of Strategic Studies 26.2 (2003): 92-119 online.
• Zhang, Xiaoming (2015). Deng Xiaoping's Long War: The Military Conflict between China and Vietnam, 1979-1991. University of North Carolina Press. ISBN 9781469621258.

• Wars between China and Vietnam
• Wars involving the People's Republic of China
• Wars involving Vietnam
• Conflicts in 1979
• 1980s conflicts
• Conflicts in 1990
• 1979 in China
• 1980s in China
• 1990 in China
• 1979 in Vietnam
• 1980s in Vietnam
• 1990 in Vietnam
• Indochina Wars
• Sino-Vietnamese War
• 20th century in China
• 20th century in Vietnam
• History of Vietnam since 1945
• Third Indochina War