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: when does the vietnam war end? 
Knowledge Triplets: Action of 23 August 1967, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Suoi Bong Trang
Vietnam War, book.book_subject.works, Sideshow, Revised Edition
m.0b78bs8, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Battle of Long Tan
North Vietnam, location.location.events, Joint warfare in South Vietnam, 1963–69
m.0b78jlb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Anti-communism
Vietnam War, time.event.includes_event, Battle of Prek Klok II
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, William Westmoreland
Vietnamization, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Operation Lam Son II
Vietnam War, time.event.included_in_event, 1970s
Vietnam War, military.military_conflict.casualties, m.04kb4mq
Laos, location.location.events, Joint warfare in South Vietnam, 1963–69
Vietnam War, book.book_subject.works, Reporting Vietnam: Part Two - American Journalism 1969-1975
Vietnam War, time.event.includes_event, Operation Robin
Vietnam War, time.event.includes_event, Operation Chopper
Vietnam War, time.event.includes_event, Operation Mameluke Thrust
Creighton Abrams, book.book_subject.works, Vietnam Chronicles: The Abrams Tapes, 1968-1972
Vietnam War, time.event.includes_event, Battle of Hill 488
Vietnam War, time.event.includes_event, Battle of Quang Tri
m.0b4887b, common.webpage.topic, Vietnam War
Vietnam War, common.topic.webpage, m.09wkmg9
Vietnam War, time.event.includes_event, Operation Allen Brook
Vietnam War, time.event.includes_event, Operation Flaming Dart
Vietnam War, time.event.includes_event, Vietnamization
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ngo Dinh Diem
365 Days, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Battle of Pat To
Vietnam War, book.book_subject.works, How I Got That Story
Vietnam War, time.event.includes_event, Battle of Phuoc Long
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78bs8
m.0kn24yx, military.military_command.military_conflict, 1960 South Vietnamese coup attempt
War in Vietnam (1954-1959), time.event.locations, North Vietnam
m.09j3ckd, military.military_combatant_group.conflict, War in Vietnam (1954-1959)
Vietnam War, time.event.includes_event, Operation Freedom Deal
Vietnam War, time.event.includes_event, Battle of A Shau
Vietnam War, time.event.includes_event, Operation Linebacker II
Vietnam War, common.topic.webpage, m.09xm1xv
Moratorium to End the War in Vietnam, common.topic.notable_types, Event
Joint warfare in South Vietnam, 1963–69, time.event.locations, South Vietnam
Vietnam War, book.book_subject.works, The Last Valley: Dien Bien Phu and the French Defeat in Vietnam
Vietnam War, military.military_conflict.casualties, m.02h77k6
Vietnam War, book.book_subject.works, 25-year War
Vietnam War, time.event.includes_event, First Battle of Quảng Trị
Vietnam War, time.event.includes_event, Battle of Ia Drang
Vietnam War, time.event.includes_event, Operation Hong Kil Dong
Vietnam War, time.event.includes_event, Battle of Đồng Hới
Vietnam War, base.fight.subject_of_protest.protests_about_this, Moratorium to End the War in Vietnam
Vietnam War, time.event.includes_event, Operation Commando Hunt
Vietnam War, time.event.includes_event, Operation Wheeler/Wallowa
Vietnam War, book.book_subject.works, 10,000 days of thunder
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Hoàng Văn Thái
Vietnam War, time.event.includes_event, Battle of Lima Site 85
Vietnam War, time.event.includes_event, 1975 Spring Offensive
Triumph Forsaken: The Vietnam War, 1954-1965, book.written_work.subjects, Vietnam War
Vietnam War, time.event.included_in_event, 1960s
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Kingdom of Laos
Action of 1 March 1968, time.event.included_in_event, Vietnam War
Vietnam War, common.topic.image, UH-1combatmission1970
Vietnam War, time.event.includes_event, Battle of Chà Là
Vietnam War, time.event.includes_event, Battle of Hoa Da – Song Mao
War in Vietnam, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Ong Thanh
Vietnam War, time.event.includes_event, Operation Prairie
Vietnam War, common.topic.webpage, m.09y37g1
Joint warfare in South Vietnam, 1963–69, time.event.locations, Laos
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Pathet Lao
1960s, time.event.includes_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Thường Đức
Vietnam War, time.event.includes_event, War in Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Nguyễn Văn Thiệu
Vietnam War, time.event.includes_event, Operation Junction City
m.09w6h34, common.webpage.topic, Vietnam War
m.09y37g1, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Ap Gu
Vietnam War, military.military_conflict.commanders, m.0478plb
Vietnam War, book.book_subject.works, Vietnam: The History of an Unwinnable War, 1945-1975
m.0b78mbw, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
A Better War: The Unexamined Victories and Final Tragedy of America's Last Years in Vietnam, book.written_work.subjects, Vietnam War
m.0dh6jtq, military.military_command.military_conflict, War in Vietnam (1954-1959)
Vietnam War, time.event.includes_event, Tet Offensive
Vietnam War, military.military_conflict.commanders, m.02h77vl
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b7915n
Vietnam War, time.event.end_date, 1975-04-30
Vietnam War, time.event.includes_event, Operation Starlite
War in Vietnam (1954-1959), time.event.locations, South Vietnam
Vietnam War, film.film_subject.films, Operation C.I.A.
Vietnam War, time.event.includes_event, Operation Prairie IV
Vietnam War, common.topic.webpage, m.09wx9cc
Moratorium to End the War in Vietnam, base.argumentmaps.motivated_event.motive, Vietnam War
Vietnam War, time.event.includes_event, Battle of Nam Dong
Vietnam War, book.book_subject.works, Last day in Vietnam
25-year War, book.written_work.subjects, Vietnam War
m.04z1wm5, military.military_command.military_conflict, 1960 South Vietnamese coup attempt
Vietnam War, time.event.included_in_event, Cold War
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Cold War
m.09wkmg9, common.webpage.topic, Vietnam War
War in Vietnam (1954-1959), time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Operation Auburn
Vietnam War, time.event.includes_event, Operation Steel Tiger
Vietnam War, time.event.includes_event, Operation Hastings
Vietnam War, time.event.includes_event, Second Battle of Quảng Trị
Last day in Vietnam, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Ivory Coast
Vietnam War, time.event.includes_event, Battle of Binh Ba
Vietnam War, time.event.includes_event, United States Air Force in South Vietnam
Vietnam War, military.military_conflict.combatants, m.03z9671
Vietnam War, book.book_subject.works, A Rumor of War
Vietnam War, common.topic.webpage, m.09xgcz2
Vietnam War, time.event.includes_event, Attack on the SS Baton Rouge Victory
Joint warfare in South Vietnam, 1963–69, time.event.locations, North Vietnam
Moratorium to End the War in Vietnam, common.topic.article, m.06r3bh
Tet 1969, time.event.included_in_event, Vietnam War
War in Vietnam (1954-1959), common.topic.notable_types, Military Conflict
Vietnam War, time.event.includes_event, Operation Niagara
Vietnam War, book.book_subject.works, Vietnam
War in Vietnam, time.event.locations, South Vietnam
Vietnam War, time.event.includes_event, Battle of Xuân Lộc
Vietnam War, film.film_subject.films, The Final War of Olly Winter
Vietnam War, common.topic.article, m.07_nr
Vietnam War, time.event.includes_event, Operation Frequent Wind
Vietnam War, time.event.includes_event, Battle of Dong Xoai
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Viet Cong
Battle of July Two, time.event.included_in_event, Vietnam War
The 11 Days of Christmas: America's Last Vietnam Battle, book.written_work.subjects, Vietnam War
Opposition to United States involvement in the Vietnam War, time.event.includes_event, 1971 May Day protests
Vietnam War, time.event.includes_event, Operation Coronado IX
Vietnam War, film.film_subject.films, 1969
Vietnam War, military.military_conflict.casualties, m.04kb4pf
Vietnam Chronicles: The Abrams Tapes, 1968-1972, book.written_work.subjects, Creighton Abrams
Vietnam War, military.military_conflict.commanders, m.07skn34
Vietnam War, common.topic.notable_for, g.1258vfs7z
Vietnam War, time.event.includes_event, New Year's Day Battle of 1968
1971 May Day protests, base.fight.protest.subject_of_protest, Vietnam War
Vietnam War, time.event.includes_event, Operation Bolo
21 and a Wake-Up, film.film.subjects, Vietnam War
Vietnam War, time.event.includes_event, Battle of Ap Da Bien
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ho Chi Minh
m.09xwgxs, common.webpage.topic, Vietnam War
m.09xtw5q, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Kien Long
Vietnam War, time.event.includes_event, Laotian Civil War
Vietnam War, time.event.includes_event, Operation Union II
m.0b7915n, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.start_date, 1955-11-01
Vietnam War, time.event.locations, Laos
Vietnam War, time.event.includes_event, Battle of Dak To
Vietnam War, book.book_subject.works, Vietnam War
Vietnam War, time.event.includes_event, War in Vietnam (1954-1959)
Vietnam War, time.event.includes_event, Operation Delaware
Vietnam War, military.military_conflict.casualties, m.02h77jh
Vietnam War, time.event.includes_event, Escape of the Provisional Revolutionary Government
Vietnam War, time.event.includes_event, Tet 1969
Vietnam War, time.event.included_in_event, 20th century
Opposition to United States involvement in the Vietnam War, time.event.includes_event, Student Strike of 1970
1971 May Day protests, base.argumentmaps.motivated_event.motive, Vietnam War
Vietnam War, time.event.includes_event, Battle of Trà Bình
Vietnam War, time.event.includes_event, Action of 1 March 1968
Vietnam War, common.topic.webpage, m.09xtw5q
Vietnam War, time.event.includes_event, Operation Hump
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, South Vietnam
Vietnam War, time.event.includes_event, Gulf of Tonkin incident
Vietnam War, military.military_conflict.casualties, m.02h77fs
Vietnam War, time.event.includes_event, Battle of Hat Dich
Vietnam War, common.topic.image, Vietnamese village after an attack
Vietnam War, time.event.includes_event, Battle of Prek Klok I
Joint warfare in South Vietnam, 1963–69, common.topic.notable_types, Military Conflict
Vietnam War, time.event.includes_event, Battle of Kontum
Vietnam War, common.topic.webpage, m.09xwgxs
Vietnam War, book.book_subject.works, Anatomy of a War
Vietnam War, time.event.includes_event, Operation Tiger Hound
Vietnam War, time.event.includes_event, Operation Igloo White
War in Vietnam (1954-1959), military.military_conflict.commanders, m.0dh6jtq
Vietnam War, time.event.includes_event, Battle of Saigon
Vietnam War, time.event.includes_event, Battle of Ban Dong
Vietnam War, book.book_subject.works, Nam-a-Rama
The Final War of Olly Winter, film.film.subjects, Vietnam War
Vietnam War, book.book_subject.works, A Tract of Time
Vietnam War, time.event.includes_event, Operation Union
Vietnam War, time.event.includes_event, Battle of Xa Cam My
Vietnam War, time.event.includes_event, Battle of Cửa Việt
Vietnam War, time.event.includes_event, Operation Bribie
Vietnam War, time.event.includes_event, Battle of Khe Sanh
Vietnam War, time.event.includes_event, Project Dye Marker
Born on the Fourth of July, film.film.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Concordia
1975 Spring Offensive, time.event.included_in_event, Vietnam War
Vietnam War, time.event.includes_event, Attack on the USNS Card
Vietnam War, time.event.includes_event, Operation Texas Star
Vietnam War, military.military_conflict.casualties, m.04kb4p4
Vietnam War, time.event.includes_event, Operation Texas
Vietnam War, time.event.includes_event, Operation Crimp
Vietnam War, time.event.includes_event, Operation Lam Son 719
Vietnam War, military.military_conflict.casualties, m.04kb4lw
Vietnam War, common.topic.webpage, m.09wmlvm
Vietnam War, military.military_conflict.casualties, m.043wptp
Vietnam War, book.book_subject.works, The sorrow of war
1970s, time.event.includes_event, Vietnam War
vietnam war.noun.01, base.wordnet.synset.equivalent_topic, Vietnam War
Vietnam War, time.event.includes_event, Operation Hawthorne
Vietnam War, time.event.includes_event, Operation Coronado II
Vietnam War, time.event.includes_event, Operation Meade River
1975 Spring Offensive, time.event.locations, South Vietnam
Sino-Vietnamese War, time.event.locations, Vietnam
Vietnam War, book.book_subject.works, Dispatches
Vietnam War, military.military_conflict.commanders, m.02h77w4
Vietnam War, common.topic.webpage, m.09xfyqk
Vietnam War, common.topic.webpage, m.0b481t3
Vietnam War, time.event.includes_event, Battle of July Two
Vietnam: The History of an Unwinnable War, 1945-1975, book.written_work.subjects, Vietnam War
Vietnam War, military.military_conflict.casualties, m.04kb4nl
Vietnam War, time.event.included_in_event, Indochina Wars
North Vietnam, location.location.events, Operation End Sweep
Vietnam War, book.book_subject.works, When Hell was in Session
Vietnam War, film.film_subject.films, 21 and a Wake-Up
Vietnam War, time.event.includes_event, Bombing of Tan Son Nhut Air Base
m.0b47hsk, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Operations Malheur I and Malheur II
Vietnam War, book.book_subject.works, Ho
Vietnam War, time.event.includes_event, Operation Attleboro
Vietnam War, film.film_subject.films, The Last Full Measure
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Communism
Vietnam War, military.military_conflict.casualties, m.04kb4ll
1969, film.film.subjects, Vietnam War
Vietnam War, user.tsegaran.random.taxonomy_subject.entry, m.04_4_4s
m.0478pmb, military.military_command.military_conflict, Vietnam War
Vietnam War, common.topic.webpage, m.09w6kz6
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Võ Nguyên Giáp
Vietnam War, time.event.includes_event, Battle of Ban Me Thuot
m.0c5n9pb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Operation Kentucky
Vietnam War, time.event.includes_event, Battle of Huế
Vietnam War, time.event.locations, North Vietnam
Vietnam War, military.military_conflict.casualties, m.04kb4kx
North Vietnam, location.location.events, War in Vietnam (1954-1959)
m.09w6kz6, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Battle of Loc Ninh
Vietnam War, film.film_subject.films, Born on the Fourth of July
Vietnam War, time.event.includes_event, Operation Taylor Common
Vietnam War, time.event.end_date, 1975-04-30
Vietnam War, book.book_subject.works, They Marched Into Sunlight: War and Peace, Vietnam and America, October 1967
Vietnam War, common.topic.webpage, m.09w6h34
Moratorium to End the War in Vietnam, common.topic.notable_for, g.1255b7mww
Vietnam War, book.book_subject.works, Notebook on Black History Month 2012 (Part 5) Black Power Mixtape continued
Vietnam War, book.book_subject.works, Two cities : Hanoi and Saigon
Vietnam: the Necessary War - A Reinterpretation of America's Most Disastrous Military Conflict, book.written_work.subjects, Vietnam War
The Last Full Measure, film.film.subjects, Vietnam War
Moratorium to End the War in Vietnam, base.vietnamwar.protest.organizations_involved, Congress for International Co-operation and Disarmament
Vietnam War, time.event.includes_event, Opposition to United States involvement in the Vietnam War
Vietnam War, book.book_subject.works, Vietnam Diary
Vietnam War, time.event.includes_event, Battle of Kham Duc
Vietnam War, book.book_subject.works, Vietnam Chronicles: The Abrams Tapes, 1968-1972
m.04z1wmb, military.military_combatant_group.conflict, 1960 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Battle of Hamburger Hill
Vietnam War, time.event.includes_event, Operation Medina
Vietnam Chronicles: The Abrams Tapes, 1968-1972, book.written_work.subjects, Vietnam War
Vietnam War, military.military_conflict.casualties, m.02h77gp
Vietnam War, time.event.includes_event, Operation Masher
m.0b78_7h, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Operation Coronado XI
Vietnam War, time.event.includes_event, Battle of Bong Son
Vietnam War, book.book_subject.works, Vietnam Inc.
Vietnam War, military.military_conflict.commanders, m.02h77tp
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Vietnam War
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b78jlb
Vietnam War, time.event.includes_event, Operation Birmingham
Vietnam War, time.event.includes_event, Battle of Suoi Tre
Vietnam War, time.event.includes_event, Operation Menu
m.09xfyqk, common.webpage.topic, Vietnam War
Vietnam War, military.military_conflict.casualties, m.04kb4m_
m.09xm1xv, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Buddhist Uprising
Vietnam War, common.topic.webpage, m.0b47hsk
Vietnam War, time.event.includes_event, Battle of Hiep Hoa
Vietnam War, book.book_subject.works, 365 Days
Vietnam War, time.event.includes_event, Operation Chenla I
Vietnam War, time.event.includes_event, Operation Barrel Roll
20th century, time.event.includes_event, Vietnam War
Vietnam War, time.event.includes_event, Battle of Binh Gia
Vietnam War, time.event.includes_event, Battle of Lang Vei
They Marched Into Sunlight: War and Peace, Vietnam and America, October 1967, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Battle of An Lão
Vietnam War, time.event.includes_event, Joint warfare in South Vietnam, 1963–69
Vietnam War, time.event.includes_event, Operation Desoto
Reporting Vietnam: Part One - American Journalism 1959-1969, book.written_work.subjects, Vietnam War
Vietnam War, time.event.includes_event, Operation Jefferson Glenn
Vietnam War, time.event.includes_event, East Sea Campaign
War in Vietnam, time.event.included_in_event, Cold War
Vietnam War, time.event.locations, Vietnam
Vietnam War, military.military_conflict.casualties, m.04kb4m4
Vietnam War, time.event.includes_event, Easter Offensive
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Le Duan
Nguyễn Văn Thiệu, military.military_person.participated_in_conflicts, 1963 South Vietnamese coup
Vietnam War, time.event.includes_event, Operation Utah
Vietnam War, time.event.includes_event, Operation Buffalo
Vietnam War Story II, film.film.subjects, Vietnam War
m.0b481t3, common.webpage.topic, Vietnam War
Vietnam War, book.book_subject.works, America in Vietnam
Vietnam War, time.event.includes_event, Battle of Prey Veng
m.09wmlvm, common.webpage.topic, Vietnam War
Reporting Vietnam: Part Two - American Journalism 1969-1975, book.written_work.subjects, Vietnam War
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Viet Minh
Vietnam War, time.event.includes_event, Battle of Ap Bac
Vietnam War, time.event.includes_event, North Vietnamese invasion of Laos
Vietnam War, film.film_subject.films, Journey from the Fall
Vietnam War, time.event.includes_event, Siege of Plei Me
Vietnam War, time.event.includes_event, Battle of Đức Cơ
Vietnam War, military.military_conflict.combatants, m.03z979q
Vietnam War, time.event.includes_event, Battle of Gang Toi
Vietnam War, time.event.includes_event, Con Thien
Vietnam War, time.event.includes_event, Battle of Haiphong Harbor
Vietnam War, time.event.includes_event, Operation Patio
Opposition to United States involvement in the Vietnam War, time.event.includes_event, Moratorium to End the War in Vietnam
Moratorium to End the War in Vietnam, base.fight.protest.subject_of_protest, Vietnam War
Vietnam War, book.book_subject.works, Vietnam: the Necessary War - A Reinterpretation of America's Most Disastrous Military Conflict
1971 May Day protests, time.event.included_in_event, Opposition to United States involvement in the Vietnam War
Vietnam War, time.event.includes_event, Operation Rolling Thunder
Moratorium to End the War in Vietnam, time.event.included_in_event, Opposition to United States involvement in the Vietnam War
Vietnam War, time.event.includes_event, Operation Bold Mariner
Vietnam War, time.event.locations, Southeast Asia
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Cao Văn Viên
UH-1combatmission1970, common.image.appears_in_topic_gallery, Vietnam War
Vietnam War, time.event.includes_event, Action of 23 August 1967
Vietnam War, time.event.includes_event, Operation Shed Light
Vietnam War, time.event.includes_event, Operation Linebacker
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.includes_event, Operation Sunrise
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78mbw
Vietnam War, time.event.includes_event, Operation Speedy Express
Vietnam War, time.event.includes_event, United States Air Force in Thailand
Vietnam War, time.event.includes_event, Operation Paul Revere IV
Vietnam War, time.event.includes_event, Operation Beaver Cage
Vietnam War, time.event.includes_event, Battle of Ban Houei Sane
m.09xgcz2, common.webpage.topic, Vietnam War
Vietnam War, time.event.includes_event, Operation Piranha
Journey from the Fall, film.film.subjects, Vietnam War
m.09w6pvn, common.webpage.topic, Vietnam War
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78_7h
Vietnam War, time.event.includes_event, Operation Coronado V
Vietnam War, book.book_subject.works, When Heaven and Earth Changed Places
m.09wx9cc, common.webpage.topic, Vietnam War
Vietnam War, base.fight.subject_of_protest.protests_about_this, 1971 May Day protests
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Anti-communism
Vietnam War, military.military_conflict.casualties, m.04kb4pq
Vietnam War, time.event.includes_event, First Battle of Loc Ninh
Vietnam War, time.event.includes_event, Operation Tailwind
Vietnam War, time.event.includes_event, Operation Chenla II
Vietnam War, time.event.includes_event, Battle of Song Be
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Communism
Vietnam War, time.event.includes_event, Battle of Kampot
Vietnam War, time.event.includes_event, Battle of Snuol
Vietnam War, book.book_subject.works, Born on the Fourth of July
Vietnam War, common.topic.webpage, m.09w6pvn
Vietnam War, time.event.includes_event, Fall of Saigon
Vietnam War, time.event.includes_event, Battle of Ap Bau Bang II
Vietnam War, book.book_subject.works, Triumph Forsaken: The Vietnam War, 1954-1965
War in Vietnam (1954-1959), time.event.included_in_event, Cold War
Vietnam War, military.military_conflict.casualties, m.04kb4kj
Vietnam War, time.event.includes_event, Battle of the Iron Triangle
Vietnam War, time.event.includes_event, Operation Camden
Vietnam War, time.event.includes_event, Mayaguez incident
Vietnam War, time.event.includes_event, Battle of Svay Rieng
Vietnam War, time.event.locations, South Vietnam
War in Vietnam, time.event.locations, North Vietnam
Vietnam War, book.book_subject.works, M.I.A., or, Mythmaking in America
Vietnam War, time.event.includes_event, Battle of Go Cong
Vietnam War, military.military_conflict.casualties, m.04kb4l7
Vietnam War, book.book_subject.works, Afterburner
Vietnam War, time.event.includes_event, Battle of Ba Gia
Vietnam War, military.military_conflict.casualties, m.04kb4mf
Vietnam War, time.event.includes_event, Operation Dewey Canyon
Vietnam War, time.event.includes_event, Operation Coburg
m.0cpl6jg, military.military_combatant_group.conflict, September 1964 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Battle of Kompong Speu
Vietnam War, time.event.includes_event, Operation Deckhouse Five
Vietnam War, time.event.includes_event, Battle of Nui Le
Vietnam War, time.event.includes_event, Combat Skyspot
Vietnam War, book.book_subject.works, The 11 Days of Christmas: America's Last Vietnam Battle
Vietnam War, time.event.includes_event, Battle of Long Dinh
Vietnam War, military.military_conflict.commanders, m.0478pmb
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0c5n9pb
Nguyễn Cao Kỳ, military.military_person.participated_in_conflicts, September 1964 South Vietnamese coup attempt
Vietnam War, time.event.includes_event, Battle of Long Khanh
Vietnam War, military.military_conflict.casualties, m.04kb4n8
Born on the Fourth of July, book.written_work.subjects, Vietnam War
Vietnam War, book.book_subject.works, Dereliction of Duty
Vietnam War, time.event.includes_event, Operation Hickory
Vietnam War, time.event.includes_event, Battle of Suoi Chau Pha
Vietnam War, time.event.includes_event, Operation Quyet Thang 202
Vietnam War, book.book_subject.works, Reporting Vietnam: Part One - American Journalism 1959-1969
Vietnam War, time.event.includes_event, Operation Swift
Vietnam War, time.event.includes_event, Battle of An Lộc
War in Vietnam (1954-1959), military.military_conflict.combatants, m.09j3ckd
Vietnam War, time.event.includes_event, Operation Truong Cong Dinh
Vietnam War, common.topic.webpage, m.0b4887b
Vietnam War, book.book_subject.works, Wounded
Vietnam War, time.event.includes_event, Battle of Hill 723
Vietnam War, time.event.includes_event, Operation Pocket Money
Vietnam War, time.event.includes_event, Operation Kingfisher
New Year's Day Battle of 1968, time.event.included_in_event, Vietnam War

Answer: 1975-04-30