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Total military dead: 333,620 (1960–1974) – 392,364 (total) Total military wounded: ≈1,340,000+[6] (excluding FARK and FANK) Total military captured: est. 1,000,000+
Following the Gulf of Tonkin incident in 1964, the US Congress passed a resolution that gave President Lyndon B. Johnson authority to increase military presence without a declaration of war. Johnson launched a bombing campaign of the north and began sending combat troops, dramatically increasing deployment to 184,000 by the end of 1965, and to 536,000 by the end of 1968. US forces relied on air supremacy and overwhelming firepower to conduct search and destroy operations in rural areas. In 1968, North Vietnam launched the Tet Offensive, which was a tactical defeat but convinced many in the US that the war could not be won. The PAVN began engaging in more conventional warfare. Johnson's successor, Richard Nixon, began a policy of "Vietnamization" from 1969, which saw the conflict fought by an expanded ARVN, while US forces withdrew. A 1970 coup in Cambodia resulted in a PAVN invasion and a US–ARVN counter-invasion, escalating its civil war. US troops had mostly withdrawn from Vietnam by 1972, and the 1973 Paris Peace Accords saw the rest leave. The accords were broken almost immediately and fighting continued until the 1975 spring offensive and fall of Saigon to the PAVN, marking the war's end. North and South Vietnam were reunified in 1976.
The war exacted an enormous human cost: estimates of Vietnamese soldiers and civilians killed range from 970,000 to 3 million. Some 275,000–310,000 Cambodians, 20,000–62,000 Laotians, and 58,220 US service members died.[A 7] Its end would precipitate the Vietnamese boat people and the larger Indochina refugee crisis, which saw millions leave Indochina, of which an estimated 250,000 perished at sea.[54][55] The US destroyed 20% of South Vietnam's jungle and 20–50% of the mangrove forests, by spraying over 20 million U.S. gallons (75 million liters) of toxic herbicides;[56][57]: 144–145 [58] a notable example of ecocide.[59] The Khmer Rouge carried out the Cambodian genocide, while conflict between them and the unified Vietnam escalated into the Cambodian–Vietnamese War. In response, China invaded Vietnam, with border conflicts lasting until 1991. Within the US, the war gave rise to Vietnam syndrome, a public aversion to American overseas military involvement,[60] which, with the Watergate scandal, contributed to the crisis of confidence that affected America throughout the 1970s.[61]
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^Blackburn, Robert M. (1994). Mercenaries and Lyndon Johnson's "More Flage": The Hiring of Korean, Filipino, and Thai Soldiers in the Vietnam War. McFarland. ISBN0-89950-931-2.
^ abMoyar, Mark. "Triumph Regained: The Vietnam War, 1965–1968." Encounter Books, December 2022. Chapter 17 index: "Communists provided further corroboration of the proximity of their casualty figures to American figures in a postwar disclosure of total losses from 1960 to 1975. During that period, they stated, they lost 849,018 killed plus approximately 232,000 missing and 463,000 wounded. Casualties fluctuated considerably from year to year, but a degree of accuracy can be inferred from the fact that 500,000 was 59 percent of the 849,018 total and that 59 percent of the war's days had passed by the time of Fallaci's conversation with Giap. The killed in action figure comes from "Special Subject 4: The Work of Locating and Recovering the Remains of Martyrs From Now Until 2020 And Later Years," downloaded from the Vietnamese government website datafile on 1 December 2017. The above figures on missing and wounded were calculated using Hanoi's declared casualty ratios for the period of 1945 to 1979, during which time the Communists incurred 1.1 million killed, 300,000 missing, and 600,000 wounded. Ho Khang, ed, Lich Su Khang Chien Chong My, Cuu Nuoc 1954–1975, Tap VIII: Toan Thang (Hanoi: Nha Xuat Ban Chinh Tri Quoc Gia, 2008), 463."
^Hastings, Max (2018). Vietnam an epic tragedy, 1945–1975. Harper Collins. ISBN978-0-06-240567-8.
^James F. Dunnigan; Albert A. Nofi (2000). Dirty Little Secrets of the Vietnam War: Military Information You're Not Supposed to Know. Macmillan. ISBN978-0-312-25282-3.
^Thayer, Thomas C. (1985). War Without Fronts: The American Experience in Vietnam. Westview Press. ISBN978-0-8133-7132-0.
^Rummel, R. J. (1997), "Vietnam Democide", Freedom, Democracy, Peace; Power, Democide, and War, University of Hawaii System, archived from the original(GIF) on 13 March 2023 {{citation}}: Unknown parameter |loc= ignored (help)
^Clarke, Jeffrey J. (1988). United States Army in Vietnam: Advice and Support: The Final Years, 1965–1973. Center of Military History, United States Army. The Army of the Republic of Vietnam suffered 254,256 recorded combat deaths between 1960 and 1974, with the highest number of recorded deaths being in 1972, with 39,587 combat deaths
^Heuveline, Patrick (2001). "The Demographic Analysis of Mortality Crises: The Case of Cambodia, 1970–1979". Forced Migration and Mortality. National Academies Press. pp. 102–104, 120, 124. ISBN978-0-309-07334-9. As best as can now be estimated, over two million Cambodians died during the 1970s because of the political events of the decade, the vast majority of them during the mere four years of the 'Khmer Rouge' regime.... Subsequent reevaluations of the demographic data situated the death toll for the [civil war] in the order of 300,000 or less.
^Sliwinski, Marek (1995). Le Génocide Khmer Rouge: Une Analyse Démographique [The Khmer Rouge genocide: A demographic analysis]. L'Harmattan. pp. 42–43, 48. ISBN978-2-7384-3525-5.