1971 in the Vietnam War
|1971 in the Vietnam War|
Fire Support Base Lolo falls to PAVN forces during Operation Lam Son 719
|Anti-Communist forces:||Communist forces:|
|South Vietnam: 1,046,250
United States: 158,120
|Casualties and losses|
|US: 2,357 killed 
South Vietnam: Killed
- February 8 – March 20, 1971
- February 8 - March 25, 1971
Operation Lam Son 719 (Vietnamese: Chiến dịch Lam Sơn 719 or Chiến dịch đường 9 – Nam Lào) was a limited-objective offensive campaign conducted in southeastern portion of the Kingdom of Laos by the armed forces of the Republic of Vietnam (South Vietnam). The objective of the campaign was the disruption of a possible future offensive by the People's Army of Vietnam (PAVN), whose logistical system within Laos was known as the Ho Chi Minh Trail (the Truong Son Road to North Vietnam).
Operation Ranch Hand was a U.S. Military operation during part of the Vietnam War, it started in 1962 and lasted till May 1971. It involved spraying an estimated 12 million + US gallons of defoliants over rural areas of South Vietnam in an attempt to deprive the Viet Cong of vegetation cover and food.
- August 20 - December 3, 1971
Year in numbers 
|Armed Force||Strength||KIA||Reference||Military costs - 1971||Military costs in 2013 US$||Reference|
|South Vietnam ARVN||1,046,250|||
|United States US Forces||158,120|||
- United States, Government (2010). "Statistical information about casualties of the Vietnam War". National Archives and Records Administration. Archived from the original on 26 January 2010. Retrieved March 6, 2010.