user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: what year did the vietnam war happen? 
Knowledge Triplets: Nguyễn Cao Kỳ, military.military_person.participated_in_conflicts, September 1964 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Battle of Kham Duc
m.0b78_7h, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Battle of A Shau
Vietnam War, time.event.includes_event, Battle of Saigon
Vietnam War, time.event.includes_event, Escape of the Provisional Revolutionary Government
Vietnam War, time.event.start_date, 1955-11-01
Nguyễn Văn Thiệu, military.military_person.participated_in_conflicts, 1960 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, War in Vietnam
m.09wx9cc, common.webpage.topic, Vietnam War
1971 May Day protests, base.argumentmaps.motivated_event.motive, Vietnam War
War in Vietnam (1954-1959), time.event.included_in_event, Cold War
Vietnam War, military.military_conflict.casualties, m.04kb4n8
Vietnam War, book.book_subject.works, They Marched Into Sunlight: War and Peace, Vietnam and America, October 1967
Vietnam War, time.event.includes_event, East Sea Campaign
Vietnam War, time.event.includes_event, Operation Niagara
Vietnam War, time.event.includes_event, Battle of Kontum
Operation Quyet Thang 202, time.event.included_in_event, Vietnam War
Vietnam War, common.topic.webpage, m.09xfyqk
Vietnam War, time.event.includes_event, Battle of Suoi Chau Pha
Vietnam War, time.event.includes_event, Operation Auburn
Vietnam War, time.event.includes_event, Battle of Kampot
Vietnam War, common.topic.webpage, m.0b47hsk
Vietnam War, military.military_conflict.casualties, m.04kb4l7
Vietnam War, time.event.includes_event, Operation Frequent Wind
Vietnam War, film.film_subject.films, Born on the Fourth of July
Action of 10 November 1944, time.event.included_in_event, World War II
Vietnam War, common.topic.webpage, m.09xwgxs
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, William Westmoreland
Vietnam War, time.event.includes_event, Operation Starlite
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Communism
Vietnam War, time.event.includes_event, Operation Oklahoma Hills
Vietnam War, time.event.includes_event, Battle of Svay Rieng
Vietnam War, military.military_conflict.casualties, m.04kb4ll
Vietnam War, time.event.includes_event, Operation Bold Mariner
Vietnam War, time.event.includes_event, Operation Masher
m.09xgcz2, common.webpage.topic, Vietnam War
War in Vietnam (1954-1959), common.topic.notable_types, Military Conflict
Action of 10 November 1944, time.event.included_in_event, Pacific War
Action of 23 April 1945, time.event.locations, Southeast Asia
Vietnam War, time.event.locations, Vietnam
Vietnam War, time.event.includes_event, Battle of the Iron Triangle
Vietnam War, time.event.includes_event, Battle of Hiep Hoa
1970s, time.event.includes_event, Vietnam War
Action of 23 August 1967, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Gang Toi
Action of 6 October 1944, time.event.included_in_event, World War II
Vietnam War, time.event.includes_event, Operation Paul Revere IV
Ngo Dinh Diem, base.crime.crime_victim.crime, 1963 South Vietnamese coup
Opposition to United States involvement in the Vietnam War, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Ong Thanh
Creighton Abrams, book.book_subject.works, Vietnam Chronicles: The Abrams Tapes, 1968-1972
m.0kn24yx, military.military_command.military_conflict, 1960 South Vietnamese coup attempt
Vietnam War, military.military_conflict.commanders, m.0478pmb
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Cold War
Vietnam War, time.event.includes_event, United States Air Force in Thailand
Vietnam War, time.event.includes_event, Operation Hong Kil Dong
Vietnam War, common.topic.webpage, m.09w6pvn
Vietnam War, common.topic.webpage, m.0b4887b
Battle of July Two, time.event.included_in_event, Vietnam War
m.09xtw5q, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Đức Cơ
Vietnam War, common.topic.webpage, m.0b481t3
War in Vietnam (1954-1959), time.event.locations, South Vietnam
Vietnam War, book.book_subject.works, A Tract of Time
Vietnam War, time.event.includes_event, Battle of Huế
Vietnam War, military.military_conflict.casualties, m.04kb4p4
Battle of Hill 723, time.event.included_in_event, Vietnam War
Vietnam War, film.film_subject.films, Journey from the Fall
Vietnam War, time.event.includes_event, Operation Prairie
Vietnam War, time.event.includes_event, Operation Lam Son 719
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Communism
Vietnam War, time.event.includes_event, Battle of July Two
m.0b481t3, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Ba Gia
Vietnam War, time.event.includes_event, Battle of Kompong Speu
Vietnam War, time.event.includes_event, Project Dye Marker
Operation Union II, time.event.included_in_event, Vietnam War
m.09w6pvn, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Khe Sanh
Vietnam War, time.event.includes_event, Battle of Lima Site 85
Triumph Forsaken: The Vietnam War, 1954-1965, book.written_work.subjects, Vietnam War
Vietnam War, book.book_subject.works, Vietnam Chronicles: The Abrams Tapes, 1968-1972
Vietnam War, book.book_subject.works, The Last Valley: Dien Bien Phu and the French Defeat in Vietnam
UH-1combatmission1970, common.image.appears_in_topic_gallery, Vietnam War
Vietnam War, time.event.includes_event, War in Vietnam (1954-1959)
m.0c5n9pb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Battle of Dak To
Vietnam War, time.event.includes_event, Operation Igloo White
Vietnam War, time.event.includes_event, Operation Freedom Deal
Vietnam War, time.event.includes_event, Operation Commando Hunt
m.09y37g1, common.webpage.topic, Vietnam War
Vietnam War Story II, film.film.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Coronado II
War in Vietnam (1954-1959), time.event.locations, North Vietnam
Vietnam War, time.event.included_in_event, Cold War
Action of 23 April 1945, common.topic.notable_types, Military Conflict
Vietnam War, time.event.includes_event, Tet 1969
Vietnam War, time.event.includes_event, Battle of Ap Gu
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Võ Nguyên Giáp
Vietnam War, book.book_subject.works, Reporting Vietnam: Part Two - American Journalism 1969-1975
m.0b78mbw, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Operation Utah
Vietnam War, time.event.includes_event, Easter Offensive
Vietnam War, time.event.locations, North Vietnam
War in Vietnam, base.culturalevent.event.entity_involved, Ho Chi Minh
Joint warfare in South Vietnam, 1963–69, common.topic.notable_types, Military Conflict
Action of 10 November 1944, common.topic.notable_types, Military Conflict
Vietnam War, time.event.includes_event, Combat Skyspot
Action of 6 October 1944, time.event.locations, Southeast Asia
Vietnam War, time.event.includes_event, Military history of Australia during the Vietnam War
Vietnamization, time.event.included_in_event, Vietnam War
Vietnam War, book.book_subject.works, Last day in Vietnam
1975 Spring Offensive, base.culturalevent.event.entity_involved, North Vietnam
Vietnam War, book.book_subject.works, Secrets: A Memoir of Vietnam and the Pentagon Papers
Vietnam War, film.film_subject.films, Vietnam War Story II
War in Vietnam, time.event.locations, North Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Cao Văn Viên
Vietnam War, time.event.includes_event, First Battle of Loc Ninh
Opposition to United States involvement in the Vietnam War, time.event.includes_event, 1971 May Day protests
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Anti-communism
Vietnam War, time.event.includes_event, Operation Attleboro
First Indochina War, time.event.locations, North Vietnam
Vietnam War, common.topic.article, m.07_nr
Vietnam War, time.event.includes_event, New Year's Day Battle of 1968
War in Vietnam, time.event.included_in_event, Vietnam War
Vietnam War, base.culturalevent.event.entity_involved, Ho Chi Minh
Vietnam War, time.event.includes_event, Battle of Ap Da Bien
Vietnam War, book.book_subject.works, 365 Days
Vietnam War, time.event.includes_event, Vũng Rô Bay Incident
1971 May Day protests, base.fight.protest.subject_of_protest, Vietnam War
Vietnam War, time.event.includes_event, Operation Desoto
Vietnam War, time.event.includes_event, Battle of Ia Drang
Vietnam War, time.event.includes_event, Operation Union
Moratorium to End the War in Vietnam, common.topic.notable_for, g.1255b7mww
Vietnam War, time.event.locations, Southeast Asia
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78_7h
Vietnam War, time.event.includes_event, Bombing of Tan Son Nhut Air Base
Vietnam War, time.event.includes_event, Operation Taylor Common
Vietnam War, time.event.includes_event, Operation Quyet Thang 202
Vietnam War, time.event.includes_event, 1975 Spring Offensive
Vietnam War, time.event.includes_event, Operation Medina
Vietnam War, common.topic.webpage, m.09w6h34
Vietnam War, time.event.includes_event, Battle of Binh Ba
War in Vietnam, time.event.included_in_event, Cold War
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, South Vietnam
Vietnam War, time.event.includes_event, Operation Kentucky
Vietnam War, time.event.included_in_event, 1960s
m.0b7915n, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, common.topic.webpage, m.09y37g1
Vietnam War, book.book_subject.works, A Better War: The Unexamined Victories and Final Tragedy of America's Last Years in Vietnam
Vietnam War, time.event.included_in_event, Indochina Wars
Action of 6 October 1944, time.event.included_in_event, Pacific War
Vietnam War, time.event.includes_event, Battle of Lang Vei
Vietnam War, time.event.includes_event, Gulf of Tonkin incident
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ho Chi Minh
Vietnam War, book.book_subject.works, Triumph Forsaken: The Vietnam War, 1954-1965
Vietnam War, time.event.includes_event, Attack on the USNS Card
Vietnam War, time.event.includes_event, Operation Meade River
m.04z1wm5, military.military_command.military_conflict, 1960 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, United States Air Force in South Vietnam
Vietnam War, military.military_conflict.casualties, m.04kb4lw
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Vietnam War
Battle of Hill 488, time.event.included_in_event, Vietnam War
Vietnam War, military.military_conflict.casualties, m.02h77jh
Vietnam War, time.event.start_date, 1955-11-01
Vietnam War, book.book_subject.works, When Heaven and Earth Changed Places
Action of 6 October 1944, common.topic.notable_types, Military Conflict
Vietnam War, military.military_conflict.casualties, m.02h77gp
Vietnam War, book.book_subject.works, Reporting Vietnam: Part One - American Journalism 1959-1969
Vietnam War, time.event.includes_event, Operation Chenla I
Vietnam, olympics.olympic_participating_country.olympics_participated_in, 1952 Summer Olympics
Vietnam War, time.event.included_in_event, 1970s
Vietnam War, time.event.includes_event, Battle of Long Tan
Vietnam War, time.event.includes_event, Attack on the SS Baton Rouge Victory
First Indochina War, base.culturalevent.event.entity_involved, North Vietnam
Vietnam War, time.event.includes_event, Battle of Cửa Việt
Vietnam War, time.event.includes_event, Operation Coronado V
Vietnam War, base.culturalevent.event.entity_involved, Lyndon B. Johnson
Vietnam War, user.tsegaran.random.taxonomy_subject.entry, m.04_4_4s
Vietnam War, time.event.includes_event, Battle of Prek Klok II
Vietnam War, time.event.includes_event, Operation Robin
Joint warfare in South Vietnam, 1963–69, time.event.locations, North Vietnam
Vietnam War, book.book_subject.works, Born on the Fourth of July
Vietnam War, time.event.includes_event, Operation Concordia
Vietnam War, time.event.includes_event, Operation Ivory Coast
Vietnam War, time.event.includes_event, Battle of Quang Tri
m.09xfyqk, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Snuol
Reporting Vietnam: Part Two - American Journalism 1969-1975, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Battle of Dong Xoai
Vietnam Chronicles: The Abrams Tapes, 1968-1972, book.written_work.subjects, Creighton Abrams
Vietnam War, time.event.includes_event, Battle of Hat Dich
Vietnam War, time.event.includes_event, Battle of Prek Klok I
Vietnam War, time.event.includes_event, Action of 23 August 1967
Nguyễn Cao Kỳ, military.military_person.participated_in_conflicts, 1963 South Vietnamese coup
Vietnam War, common.topic.notable_for, g.1258vfs7z
Ho Chi Minh City, location.location.events, September 1964 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Battle of Bong Son
Vietnam War, book.book_subject.works, How I Got That Story
Vietnam War, time.event.includes_event, Battle of Suoi Bong Trang
Ngo Dinh Diem, base.crime.crime_victim.crime, 1960 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Operation Deckhouse Five
Vietnam War, time.event.includes_event, Battle of Ban Houei Sane
Vietnam War, time.event.includes_event, Hue–Da Nang Campaign
Vietnam War, time.event.includes_event, Battle of Ap Bac
Vietnam War, time.event.includes_event, Battle of Long Dinh
Vietnam War, time.event.includes_event, Battle of Thường Đức
Vietnam War, book.book_subject.works, Two cities : Hanoi and Saigon
Vietnam War, time.event.includes_event, Second Battle of Quảng Trị
Vietnam War, time.event.includes_event, Operation Rolling Thunder
Vietnam War, common.topic.webpage, m.09wx9cc
1952 Summer Olympics, olympics.olympic_games.participating_countries, Vietnam
Sino-Vietnamese War, time.event.locations, Vietnam
Vietnam War, book.book_subject.works, Vietnam: the Necessary War - A Reinterpretation of America's Most Disastrous Military Conflict
Vietnam War, film.film_subject.films, 1969
Vietnam War, time.event.includes_event, Operation Camden
Vietnam War, time.event.includes_event, Battle of Go Cong
m.0b4887b, common.webpage.topic, Vietnam War
Vietnam Chronicles: The Abrams Tapes, 1968-1972, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Buffalo
Vietnam War, military.military_conflict.casualties, m.02h77fs
They Marched Into Sunlight: War and Peace, Vietnam and America, October 1967, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Hickory
Vietnam War, time.event.includes_event, Buddhist Uprising
Vietnam War, common.topic.webpage, m.09w6kz6
Vietnam War, time.event.includes_event, Operation Menu
Vietnam War, time.event.includes_event, First Battle of Quảng Trị
Vietnam War, time.event.includes_event, Battle of Prey Veng
Vietnam War, time.event.includes_event, Battle of Loc Ninh
War in Vietnam (1954-1959), military.military_conflict.combatants, m.09j3ckd
Joint warfare in South Vietnam, 1963–69, time.event.locations, Laos
Vietnam War, time.event.includes_event, Battle of Suoi Tre
Vietnam War, military.military_conflict.casualties, m.04kb4mq
Vietnam War, time.event.includes_event, Operation Lam Son II
Vietnam War, time.event.includes_event, Battle of Song Be
1971 May Day protests, time.event.included_in_event, Opposition to United States involvement in the Vietnam War
Vietnam War, time.event.includes_event, Battle of Ban Dong
Vietnam War, time.event.includes_event, Operation Crimp
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Nguyễn Văn Thiệu
Vietnam War, time.event.included_in_event, 20th century
Vietnam War, time.event.includes_event, Battle of Ap Bau Bang II
North Vietnam, location.location.events, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Operation Mameluke Thrust
Vietnam War, book.book_subject.works, Notebook on Black History Month 2012 (Part 5) Black Power Mixtape continued
Vietnam War, time.event.includes_event, Operation Chenla II
Vietnam War, time.event.includes_event, Operation Tailwind
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Hoàng Văn Thái
Vietnam War, common.topic.image, UH-1combatmission1970
Vietnam War, time.event.includes_event, Operation Hastings
m.0cpl6jg, military.military_combatant_group.conflict, September 1964 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Operation Bribie
Reporting Vietnam: Part One - American Journalism 1959-1969, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Battle of Đồng Hới
Vietnam War, time.event.includes_event, Opposition to United States involvement in the Vietnam War
Vietnam War, film.film_subject.films, 21 and a Wake-Up
Vietnam War, book.book_subject.works, Vietnam: The History of an Unwinnable War, 1945-1975
Vietnam War, time.event.includes_event, Battle of Nam Dong
Vietnam War, time.event.includes_event, Battle of Chà Là
1969, film.film.subjects, Vietnam War
Action of 23 April 1945, time.event.included_in_event, Pacific War
New Year's Day Battle of 1968, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Siege of Plei Me
Vietnam War, time.event.includes_event, Operation Swift
Action of 1 March 1968, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Fall of Saigon
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78bs8
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Viet Minh
Nguyễn Văn Thiệu, military.military_person.participated_in_conflicts, 1963 South Vietnamese coup
Vietnam War, time.event.includes_event, Operation Prairie IV
Vietnam War, time.event.includes_event, Operation Hump
21 and a Wake-Up, film.film.subjects, Vietnam War
Vietnam War, time.event.end_date, 1975-04-30
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0c5n9pb
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Viet Cong
Tet 1969, time.event.included_in_event, Vietnam War
South Vietnam, common.topic.image, Trưng cầu dân ý năm 1955 đưa Ngô Đình Diệm lên nắm quyền
Vietnam War, book.book_subject.works, Vietnam Diary
Ho Chi Minh City, location.location.events, 1960 South Vietnamese coup attempt
Vietnam War, time.event.locations, South Vietnam
Vietnam War, book.book_subject.works, Vietnam
Vietnam War, time.event.includes_event, Operation Allen Brook
Vietnam War, time.event.includes_event, Battle of Long Khanh
Vietnam War, book.book_subject.works, Sideshow, Revised Edition
20th century, time.event.includes_event, Vietnam War
m.09w6kz6, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Phuoc Long
Vietnam War, time.event.includes_event, Battle of Nui Le
Vietnam War, time.event.includes_event, Battle of Hill 488
Vietnam War, book.book_subject.works, 25-year War
Vietnam War, time.event.includes_event, Operation Shed Light
m.0b78bs8, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Action of 1 March 1968
Vietnam War, book.book_subject.works, Dispatches
Vietnam War, time.event.includes_event, Operation Chopper
1975 Spring Offensive, base.culturalevent.event.entity_involved, Viet Cong
Vietnam War, military.military_conflict.commanders, m.0478plb
Vietnam War, time.event.includes_event, Operation Texas
Vietnam War, time.event.includes_event, Battle of Kien Long
Vietnam War, time.event.includes_event, Operation Birmingham
Vietnam War, common.topic.webpage, m.09xm1xv
1975 Spring Offensive, symbols.namesake.named_after, Ho Chi Minh
Vietnam War, time.event.includes_event, Battle of Binh Gia
1975 Spring Offensive, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Operation Union II
Vietnam War, time.event.includes_event, Operation Pocket Money
Vietnam War, book.book_subject.works, Vietnam: The Origins of Revolution
Vietnam War, time.event.includes_event, Operation Wheeler/Wallowa
North Vietnam, location.location.events, War in Vietnam (1954-1959)
A Better War: The Unexamined Victories and Final Tragedy of America's Last Years in Vietnam, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Tet Offensive
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Kingdom of Laos
Vietnam War, time.event.includes_event, Operation Sunrise
1975 Spring Offensive, time.event.locations, South Vietnam
Vietnam War, military.military_conflict.casualties, m.04kb4pq
Vietnam War, time.event.includes_event, Battle of Trà Bình
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b7915n
Laos, location.location.events, Joint warfare in South Vietnam, 1963–69
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Anti-communism
North Vietnamese invasion of Laos, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Ban Me Thuot
Vietnam War, book.book_subject.works, Nuremberg and Vietnam
Vietnam War, common.topic.webpage, m.09wkmg9
Vietnam War, common.topic.webpage, m.09xtw5q
Action of 10 November 1944, time.event.locations, Southeast Asia
Vietnam War, time.event.includes_event, Operation Dewey Canyon
Vietnam War, time.event.includes_event, Battle of Xa Cam My
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Pathet Lao
Born on the Fourth of July, book.written_work.subjects, Vietnam War
m.04z1wmb, military.military_combatant_group.conflict, 1960 South Vietnamese coup attempt
Ho Chi Minh City, location.location.events, 1963 South Vietnamese coup
1975 Spring Offensive, base.culturalevent.event.entity_involved, South Vietnam
Vietnam War, time.event.includes_event, Operation Delaware
Vietnam War, common.topic.webpage, m.09wmlvm
Vietnam War, time.event.includes_event, Con Thien
Vietnam War, time.event.includes_event, Battle of Hill 723
Vietnam War, time.event.includes_event, Operation Coronado XI
Vietnam War, time.event.includes_event, Operation Piranha
Vietnam War, time.event.includes_event, Operation Steel Tiger
Action of 23 April 1945, time.event.included_in_event, World War II
Vietnam War, time.event.includes_event, Battle of An Lộc
Vietnam War, time.event.includes_event, Operation Coburg
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ngo Dinh Diem
Vietnam War, time.event.includes_event, Battle of Hoa Da – Song Mao
Vietnam War, book.book_subject.works, The 11 Days of Christmas: America's Last Vietnam Battle
Vietnam War, time.event.includes_event, Operation Linebacker II
m.0b78jlb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Battle of Hamburger Hill
Vietnam War, book.book_subject.works, Vietnam Inc.
Vietnam War, time.event.includes_event, North Vietnamese invasion of Laos
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78mbw
m.09w6h34, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Pat To
Opposition to United States involvement in the Vietnam War, time.event.includes_event, Student Strike of 1970
Born on the Fourth of July, film.film.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Truong Cong Dinh
War in Vietnam (1954-1959), military.military_conflict.commanders, m.0dh6jtq
Vietnam War, military.military_conflict.casualties, m.02h77k6
Vietnam War, base.fight.subject_of_protest.protests_about_this, 1971 May Day protests
Vietnam War, time.event.includes_event, Operations Malheur I and Malheur II
Vietnam War, time.event.includes_event, Battle of Haiphong Harbor
Vietnam War, time.event.includes_event, Operation Speedy Express
m.09j3ckd, military.military_combatant_group.conflict, War in Vietnam (1954-1959)
Vietnam War, time.event.includes_event, Battle of Duc Lap
Joint warfare in South Vietnam, 1963–69, time.event.locations, South Vietnam
Vietnam War, book.book_subject.works, Ho
Vietnam War, time.event.locations, Laos
Vietnam War, time.event.includes_event, Operation Coronado IX
War in Vietnam (1954-1959), time.event.included_in_event, Vietnam War
m.0dh6jtq, military.military_command.military_conflict, War in Vietnam (1954-1959)
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b78jlb
Vietnam War, time.event.includes_event, Vietnamization
1960s, time.event.includes_event, Vietnam War
Vietnam War, military.military_conflict.casualties, m.043wptp
Vietnam War, book.book_subject.works, America in Vietnam
Action of 23 April 1945, base.culturalevent.event.entity_involved, United States of America
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Le Duan
Vietnam War, time.event.includes_event, Operation Hawthorne
War in Vietnam, time.event.locations, South Vietnam
Vietnam War, time.event.includes_event, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Battle of Xuân Lộc
Vietnam War, time.event.includes_event, Battle of An Lão
Vietnam War, common.topic.webpage, m.09xgcz2
Vietnam War, time.event.includes_event, Operation Junction City
25-year War, book.written_work.subjects, Vietnam War
Vietnam War, book.book_subject.works, Nam-a-Rama
Vietnam War, military.military_conflict.casualties, m.04kb4m4
Vietnam War, book.book_subject.works, M.I.A., or, Mythmaking in America
Vietnam: The History of an Unwinnable War, 1945-1975, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Texas Star
Vietnam War, time.event.includes_event, Operation Patio
Vietnam War, time.event.includes_event, Operation Jefferson Glenn
Action of 10 November 1944, base.culturalevent.event.entity_involved, United States of America
Vietnam War, film.film_subject.films, Operation C.I.A.
Vietnam War, book.book_subject.works, 10,000 days of thunder
Vietnam War, time.event.includes_event, Operation Bolo
The 11 Days of Christmas: America's Last Vietnam Battle, book.written_work.subjects, Vietnam War

Answer: 1955-11-01