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 locations in which the Vietnam War was fought have a standing army of fewer than 857000 people? 
Knowledge Triplets: Vietnam War, military.military_conflict.casualties, m.02h77fs
Vietnam War, base.culturalevent.event.entity_involved, South Vietnam
m.04m2vg5, military.military_combatant_group.combatants, South Vietnam
m.04yx35t, military.military_combatant_group.combatants, North Vietnam
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Cold War
Vietnam War, common.topic.image, UH-1combatmission1970
War in Vietnam (1954-1959), common.topic.notable_types, Military Conflict
m.0bd485_, military.military_combatant_group.combatants, North Vietnam
Operation Ivory Coast, time.event.locations, North Vietnam
m.04yzznh, military.military_combatant_group.combatants, South Vietnam
Vietnam War, common.topic.webpage, m.09xtw5q
Vietnam Veterans Memorial, location.location.containedby, Washington, D.C.
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Viet Cong
South Vietnam, location.location.containedby, Southeast Asia
m.04z002c, military.military_combatant_group.combatants, North Vietnam
Vietnam War, common.topic.webpage, m.09xfyqk
Vietnam War, military.military_conflict.casualties, m.04kb4m4
Cambodia, location.location.events, Cambodian–Vietnamese War
m.0cpl3br, military.military_combatant_group.combatants, South Vietnam
m.04z0df9, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.location.contains, Gia Dinh
m.05tfrd3, military.military_combatant_group.combatants, South Vietnam
m.04ywvc3, military.military_combatant_group.combatants, South Vietnam
Battle of Saigon, base.culturalevent.event.entity_involved, South Vietnam
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78bs8
m.0dh6jtq, military.military_command.military_conflict, War in Vietnam (1954-1959)
Southeast Asia, book.book_subject.works, Vietnam War
1960 South Vietnamese coup attempt, time.event.locations, Ho Chi Minh City
m.04z083j, military.military_combatant_group.combatants, South Vietnam
m.0b79c5w, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78_7h
South Vietnam, location.location.contains, Ap Lo Gom
m.0g5c27c, military.military_combatant_group.combatants, South Vietnam
m.04ftw28, military.military_combatant_group.combatants, North Vietnam
War in Vietnam (1954-1959), time.event.locations, North Vietnam
North Vietnam, location.country.capital, Hanoi
m.05cnn5f, military.military_combatant_group.combatants, North Vietnam
Ho Chi Minh City, base.biblioness.bibs_location.country, Vietnam
m.04ftx09, military.military_combatant_group.combatants, North Vietnam
m.0cv4v7w, military.military_combatant_group.combatants, North Vietnam
m.05tfs24, military.military_combatant_group.combatants, South Vietnam
m.04z2bd_, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Kingdom of Laos
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b78jlb
Vietnam War, common.topic.webpage, m.09y37g1
Vietnam War, location.location.events, Laos
m.04z0sqf, military.military_combatant_group.combatants, North Vietnam
Vietnam War, time.event.locations, South Vietnam
North Vietnam, location.location.events, First Indochina War
South Vietnam, location.location.people_born_here, Siu Ta
m.04y_300, military.military_combatant_group.combatants, South Vietnam
Vietnam War, common.topic.webpage, m.09w6pvn
m.0bd31gj, military.military_combatant_group.combatants, North Vietnam
m.04ftybk, military.military_combatant_group.combatants, South Vietnam
m.04z0cd1, military.military_combatant_group.combatants, North Vietnam
m.07slz04, military.military_combatant_group.combatants, North Vietnam
North Vietnam, location.location.events, Operation Pierce Arrow
Vietnam, location.location.events, Vietnam War
m.04y_0np, military.military_combatant_group.combatants, South Vietnam
m.062v8cs, military.military_combatant_group.combatants, North Vietnam
m.04z002j, military.military_combatant_group.combatants, South Vietnam
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ho Chi Minh
Hanoi, location.location.containedby, Vietnam
m.04yw7ks, military.military_combatant_group.combatants, North Vietnam
m.04z17nj, military.military_combatant_group.combatants, North Vietnam
m.04fvprp, military.military_combatant_group.combatants, South Vietnam
Vietnam War, military.military_conflict.casualties, m.04kb4l7
m.04y_br0, military.military_combatant_group.combatants, North Vietnam
m.04z0z3k, military.military_combatant_group.combatants, South Vietnam
Vietnam War, time.event.locations, North Vietnam
m.0czwyb_, military.military_combatant_group.combatants, South Vietnam
Vietnam, location.location.containedby, Asia
South Vietnam, location.location.people_born_here, Nguyễn Sĩ Bình
September 1964 South Vietnamese coup attempt, time.event.locations, Ho Chi Minh City
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Hoàng Văn Thái
North Vietnam, common.topic.image, LocationNorthVietnam
m.0bd34v7, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.country.national_anthem, m.0gm710l
m.09j3ckd, military.military_combatant_group.conflict, War in Vietnam (1954-1959)
Vietnam, base.locations.countries.continent, Asia
m.04y_s8t, military.military_combatant_group.combatants, North Vietnam
North Vietnam, location.location.people_born_here, Hanoi Hannah
Vietnam War, location.location.events, Vietnam
Vietnam War, book.written_work.subjects, Southeast Asia
m.04fv8nj, military.military_combatant_group.combatants, North Vietnam
m.04yvh30, military.military_combatant_group.combatants, North Vietnam
m.04z15c1, military.military_combatant_group.combatants, North Vietnam
m.04ftw8j, military.military_combatant_group.combatants, North Vietnam
Vietnam War, common.topic.webpage, m.0b4887b
m.04ftqs2, military.military_combatant_group.combatants, North Vietnam
Battle of Haiphong Harbor, time.event.locations, North Vietnam
Ho Chi Minh City, location.location.events, 1960 South Vietnamese coup attempt
m.06482w8, military.military_combatant_group.combatants, North Vietnam
Vietnam War, base.culturalevent.event.entity_involved, North Vietnam
m.03z97td, military.military_combatant_group.combatants, North Vietnam
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Le Duan
m.0cpk9xf, military.military_combatant_group.combatants, South Vietnam
m.0c5n9pb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
m.05cnn5l, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, common.topic.notable_types, Military Conflict
m.04yz302, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, time.event.locations, Laos
m.0gb12l8, military.military_combatant_group.combatants, South Vietnam
m.04y_nm6, military.military_combatant_group.combatants, North Vietnam
m.04yvf_d, military.military_combatant_group.combatants, South Vietnam
m.0b78mbw, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Operation Chopper, time.event.locations, South Vietnam
m.04ftr19, military.military_combatant_group.combatants, North Vietnam
m.04y_651, military.military_combatant_group.combatants, South Vietnam
War in Vietnam, time.event.locations, South Vietnam
m.07llp3_, military.military_combatant_group.combatants, North Vietnam
Vietnam, location.country.capital, Hanoi
Vietnam, location.location.events, Sino-Vietnamese War
Mainland Southeast Asia, location.location.contains, Vietnam
m.02h77gp, military.casualties.combatant, South Vietnam
m.04yw881, military.military_combatant_group.combatants, North Vietnam
Battle of Saigon, time.event.locations, South Vietnam
South Vietnam, location.location.geolocation, m.09dx4xf
m.0g5c716, military.military_combatant_group.combatants, North Vietnam
m.04z1wmb, military.military_combatant_group.combatants, South Vietnam
1963 South Vietnamese coup, time.event.locations, South Vietnam
m.04ywvbz, military.military_combatant_group.combatants, North Vietnam
m.04yw_cr, military.military_combatant_group.combatants, North Vietnam
m.04yzytw, military.military_combatant_group.combatants, South Vietnam
m.0bd4cz8, military.military_combatant_group.combatants, North Vietnam
m.04z1097, military.military_combatant_group.combatants, North Vietnam
Vietnam War, common.topic.webpage, m.09wkmg9
Vietnam War, time.event.locations, Southeast Asia
m.04y_df7, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.statistical_region.population, m.0h_3jlj
North Vietnam, location.location.events, Vietnamization
War in Vietnam, base.culturalevent.event.entity_involved, South Vietnam
m.0jmy703, military.military_combatant_group.combatants, North Vietnam
Vietnam War, common.topic.webpage, m.0b481t3
m.04yxsw9, military.military_combatant_group.combatants, North Vietnam
m.02h77fs, military.casualties.combatant, South Vietnam
m.04yv2ck, military.military_combatant_group.combatants, North Vietnam
Operation Chopper, time.event.locations, North Vietnam
m.0b78jlb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
m.04yvqm2, military.military_combatant_group.combatants, North Vietnam
m.04y_qtc, military.military_combatant_group.combatants, South Vietnam
War in Vietnam, time.event.locations, North Vietnam
m.04yz37j, military.military_combatant_group.combatants, North Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Communism
Cold War, time.event.locations, Vietnam
War in Vietnam, military.military_conflict.commanders, m.0dh5jv_
m.0b79163, military.military_combatant_group.combatants, North Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Pathet Lao
Vietnam, location.location.containedby, Mainland Southeast Asia
Vietnam War, military.military_conflict.casualties, m.02h77jh
South Vietnam, location.location.people_born_here, Hong Le Webb
m.04z0n0q, military.military_combatant_group.combatants, North Vietnam
m.04yzblv, military.military_combatant_group.combatants, South Vietnam
m.04z0cm0, military.military_combatant_group.combatants, North Vietnam
m.04y_2zr, military.military_combatant_group.combatants, North Vietnam
m.04z0853, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b7915n
m.05cnzgm, military.military_combatant_group.combatants, North Vietnam
Battle of Saigon, time.event.locations, Ho Chi Minh City
m.04yvfm8, military.military_combatant_group.combatants, North Vietnam
m.04yzp99, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.location.people_born_here, Jane Luu
Vietnam War, military.military_conflict.casualties, m.02h77gp
War in Vietnam, military.military_conflict.combatants, m.09sdkpy
m.04z0z3d, military.military_combatant_group.combatants, North Vietnam
m.05cnzgs, military.military_combatant_group.combatants, South Vietnam
m.04yw886, military.military_combatant_group.combatants, South Vietnam
m.04fts66, military.military_combatant_group.combatants, South Vietnam
Vietnam, location.country.administrative_divisions, Quảng Ngãi Province
m.04z0zbg, military.military_combatant_group.combatants, South Vietnam
m.04yw7ky, military.military_combatant_group.combatants, South Vietnam
1975 Spring Offensive, time.event.locations, South Vietnam
Vietnam War, time.event.locations, Cambodia
m.04y_2_w, military.military_combatant_group.combatants, North Vietnam
m.04y_qt6, military.military_combatant_group.combatants, North Vietnam
War in Vietnam, base.culturalevent.event.entity_involved, Ngo Dinh Diem
m.04yx8kv, military.military_combatant_group.combatants, North Vietnam
m.04ftw8p, military.military_combatant_group.combatants, South Vietnam
m.04fvk4y, military.military_combatant_group.combatants, North Vietnam
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Viet Minh
War in Vietnam (1954-1959), military.military_conflict.commanders, m.0dh6jtq
m.04kb4kj, military.casualties.combatant, South Vietnam
m.03z9671, military.military_combatant_group.combatants, South Vietnam
Vietnam War, base.culturalevent.event.entity_involved, Cuba
South Vietnam, location.location.people_born_here, Hubert Vo
Vietnam War, time.event.locations, Vietnam
m.04fvhjs, military.military_combatant_group.combatants, South Vietnam
m.04ftr1g, military.military_combatant_group.combatants, South Vietnam
m.04y__fs, military.military_combatant_group.combatants, South Vietnam
Vietnam War, base.culturalevent.event.entity_involved, Ho Chi Minh
m.03z96cp, military.military_combatant_group.combatants, South Vietnam
North Vietnam, location.location.events, Joint warfare in South Vietnam, 1963–69
m.04ftrvb, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, William Westmoreland
m.04yz2_y, military.military_combatant_group.combatants, North Vietnam
m.04yvqp7, military.military_combatant_group.combatants, South Vietnam
First Indochina War, time.event.locations, Southeast Asia
m.04ywny8, military.military_combatant_group.combatants, North Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Võ Nguyên Giáp
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Anti-communism
m.0cpl6jg, military.military_combatant_group.combatants, South Vietnam
m.05t8hr0, military.military_combatant_group.combatants, South Vietnam
m.04yz_7h, military.military_combatant_group.combatants, North Vietnam
Vietnam War, common.topic.webpage, m.09w6h34
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, South Vietnam
m.0g5cwl3, military.military_combatant_group.combatants, North Vietnam
m.04ywmnk, military.military_combatant_group.combatants, North Vietnam
m.04ftw4b, military.military_combatant_group.combatants, North Vietnam
War in Vietnam, base.culturalevent.event.entity_involved, United States of America
m.05tbj5v, military.military_combatant_group.combatants, North Vietnam
Vietnam War, book.written_work.subjects, Asia
Ho Chi Minh City, location.location.events, Battle of Saigon
Vietnam War, military.military_conflict.casualties, m.04kb4n8
m.04z0g94, military.military_combatant_group.combatants, South Vietnam
m.0bm_4c3, military.military_combatant_group.combatants, South Vietnam
Ho Chi Minh City, location.location.events, September 1964 South Vietnamese coup attempt
m.0b78bs8, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
m.04yvqm7, military.military_combatant_group.combatants, South Vietnam
m.05nq44r, military.military_combatant_group.combatants, South Vietnam
m.04y_53f, military.military_combatant_group.combatants, South Vietnam
Vietnamization, time.event.locations, North Vietnam
m.04z0g8_, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.location.people_born_here, David Pham
m.04fts61, military.military_combatant_group.combatants, North Vietnam
North Vietnam, location.location.events, Operation Chopper
South Vietnam, location.statistical_region.population, m.0h_3jlb
Vietnam War, common.topic.webpage, m.09w6kz6
South Vietnam, location.location.people_born_here, Nguyễn Xuân Ngãi
Vietnam, location.location.events, Cold War
North Vietnam, location.location.events, Operation End Sweep
m.04z0wjv, military.military_combatant_group.combatants, South Vietnam
m.0dfgcjt, military.military_combatant_group.combatants, North Vietnam
m.04ftyc1, military.military_combatant_group.combatants, South Vietnam
War in Vietnam (1954-1959), time.event.included_in_event, Vietnam War
m.07lm3yg, military.military_combatant_group.combatants, North Vietnam
m.04z083c, military.military_combatant_group.combatants, North Vietnam
m.0fs6v7n, military.military_combatant_group.combatants, North Vietnam
Southeast Asia, location.location.contains, Provisional Revolutionary Government of the Republic of South Vietnam
Laos, location.location.events, Vietnam War
War in Vietnam, base.culturalevent.event.entity_involved, Viet Cong
First Indochina War, base.culturalevent.event.entity_involved, North Vietnam
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78mbw
m.04z18hs, military.military_combatant_group.combatants, South Vietnam
m.04z0cm5, military.military_combatant_group.combatants, South Vietnam
m.04z35mt, military.military_combatant_group.combatants, North Vietnam
m.09j4462, military.military_combatant_group.combatants, South Vietnam
Ho Chi Minh City, location.location.containedby, Vietnam
Vietnam War, common.topic.webpage, m.0b47hsk
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Vietnam War
Joint warfare in South Vietnam, 1963–69, time.event.locations, South Vietnam
Indochina Wars, time.event.locations, Southeast Asia
Vietnam, location.country.administrative_divisions, Ho Chi Minh City
m.04yvqp2, military.military_combatant_group.combatants, North Vietnam
m.04yzp9g, military.military_combatant_group.combatants, South Vietnam
Vietnam War, base.fight.subject_of_protest.protests_about_this, Moratorium to End the War in Vietnam
Cambodian–Vietnamese War, time.event.locations, Cambodia
m.05tbj5p, military.military_combatant_group.combatants, South Vietnam
War in Vietnam, base.culturalevent.event.entity_involved, Ho Chi Minh
m.04fttvx, military.military_combatant_group.combatants, South Vietnam
m.09sdkpy, military.military_combatant_group.combatants, South Vietnam
m.05cl1dh, military.military_combatant_group.combatants, North Vietnam
m.04y_0nj, military.military_combatant_group.combatants, North Vietnam
m.0cmxgmm, military.military_combatant_group.combatants, North Vietnam
m.04yv_4k, military.military_combatant_group.combatants, South Vietnam
m.04z0ccf, military.military_combatant_group.combatants, North Vietnam
m.04z084z, military.military_combatant_group.combatants, North Vietnam
m.0chc14c, military.military_combatant_group.combatants, South Vietnam
m.04z1mrp, military.military_combatant_group.combatants, North Vietnam
Vietnam, location.country.administrative_divisions, Hanoi
Vietnam War, time.event.locations, Cambodia
m.0gx8n8z, military.military_combatant_group.combatants, North Vietnam
Sino-Vietnamese War, time.event.locations, Vietnam
m.0b7915n, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
North Vietnam, location.location.events, War in Vietnam
m.0b798ys, military.military_combatant_group.combatants, North Vietnam
m.04z2bdv, military.military_combatant_group.combatants, North Vietnam
m.0gtztyw, military.military_combatant_group.combatants, North Vietnam
m.04ywnyf, military.military_combatant_group.combatants, South Vietnam
m.05cl1dn, military.military_combatant_group.combatants, South Vietnam
m.0b78_7h, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
War in Vietnam, military.military_conflict.combatants, m.09sdkq2
South Vietnam, location.location.people_born_here, Tran Dinh Truong
Vietnam War, base.culturalevent.event.entity_involved, Taiwan
m.04ftw4h, military.military_combatant_group.combatants, South Vietnam
m.0ggd4zm, military.military_combatant_group.combatants, North Vietnam
First Indochina War, time.event.locations, North Vietnam
Vietnam, location.country.administrative_divisions, Quảng Trị Province
m.03z979q, military.military_combatant_group.combatants, North Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Nguyễn Văn Thiệu
1963 South Vietnamese coup, time.event.locations, Ho Chi Minh City
m.04yvh35, military.military_combatant_group.combatants, South Vietnam
Vietnam War, common.topic.webpage, m.09wx9cc
September 1964 South Vietnamese coup attempt, time.event.locations, South Vietnam
m.04y_6r1, military.military_combatant_group.combatants, North Vietnam
War in Vietnam (1954-1959), military.military_conflict.combatants, m.09j3ckd
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0c5n9pb
m.04z0zb9, military.military_combatant_group.combatants, North Vietnam
North Vietnam, location.location.events, Battle of Haiphong Harbor
m.05cldkd, military.military_combatant_group.combatants, North Vietnam
Vietnam, location.country.administrative_divisions, Quang Binh Province
South Vietnam, location.location.contains, Bình Ba
m.04y_64x, military.military_combatant_group.combatants, North Vietnam
Vietnam War, military.military_conflict.casualties, m.02h77k6
m.04yvf_7, military.military_combatant_group.combatants, North Vietnam
Vietnam War, time.event.included_in_event, Indochina Wars
War in Vietnam, common.topic.notable_types, Military Conflict
War in Vietnam (1954-1959), time.event.locations, South Vietnam
War in Vietnam (1954-1959), time.event.included_in_event, Cold War
m.09j4467, military.military_combatant_group.combatants, North Vietnam
m.0chcw7q, military.military_combatant_group.combatants, South Vietnam
North Vietnam, location.location.events, Vietnam War
Southeast Asia, location.location.events, Vietnam War
m.04yvsdy, military.military_combatant_group.combatants, North Vietnam
m.04kb4l7, military.casualties.combatant, North Vietnam
Vietnam War, common.topic.webpage, m.09xgcz2
m.04yw_cx, military.military_combatant_group.combatants, South Vietnam
m.05ckz3p, military.military_combatant_group.combatants, South Vietnam
Vietnam War, time.event.locations, Laos
Southeast Asia, location.location.events, First Indochina War
South Vietnam, location.location.people_born_here, Nathan Pham
South Vietnam, location.country.capital, Ho Chi Minh City
Vietnam, location.location.containedby, Eurasia
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ngo Dinh Diem
Joint warfare in South Vietnam, 1963–69, time.event.locations, North Vietnam
Asia, base.locations.continents.countries_within, Vietnam
m.04fvprj, military.military_combatant_group.combatants, North Vietnam
m.0b797xy, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.location.people_born_here, Andrew Lam
m.04fvjr2, military.military_combatant_group.combatants, North Vietnam
m.04yx35z, military.military_combatant_group.combatants, South Vietnam
Vietnam War, military.military_conflict.combatants, m.03z979q
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Communism
Cambodia, location.location.events, Vietnam War
m.05ckv_0, military.military_combatant_group.combatants, South Vietnam
m.04z17np, military.military_combatant_group.combatants, South Vietnam
m.04y_s8z, military.military_combatant_group.combatants, South Vietnam
m.06wj2w6, military.military_combatant_group.combatants, North Vietnam
South Vietnam, location.location.people_born_here, Ngô Đình Lệ Quyên
m.04ftxwg, military.military_combatant_group.combatants, South Vietnam
m.04y_39h, military.military_combatant_group.combatants, South Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Cao Văn Viên
Vietnam War, military.military_conflict.combatants, m.03z9671
m.09j3ckd, military.military_combatant_group.combatants, South Vietnam
m.0dls8dn, military.military_combatant_group.combatants, North Vietnam
Ho Chi Minh City, location.location.events, 1963 South Vietnamese coup
m.04y_538, military.military_combatant_group.combatants, North Vietnam
m.04yzblp, military.military_combatant_group.combatants, North Vietnam
North Vietnam, location.location.geolocation, m.0wmhy7k
South Vietnam, location.location.people_born_here, Phuong Ngo
War in Vietnam, base.culturalevent.event.entity_involved, Le Duan
Southeast Asia, location.location.contains, South Vietnam
South Vietnam, location.location.contains, Van Tuong
Vietnam War, common.topic.webpage, m.09xm1xv
m.04z7_yd, military.military_combatant_group.combatants, North Vietnam
m.04y_39b, military.military_combatant_group.combatants, North Vietnam
North Vietnam, location.location.events, Operation Ivory Coast
m.05cm_tm, military.military_combatant_group.combatants, South Vietnam
m.04zd3yf, military.military_combatant_group.combatants, North Vietnam
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Anti-communism
Southeast Asia, location.location.contains, Empire of Vietnam
North Vietnam, location.location.events, War in Vietnam (1954-1959)
m.04z1mrv, military.military_combatant_group.combatants, South Vietnam
Southeast Asia, location.location.events, Indochina Wars
Laos, location.location.events, Joint warfare in South Vietnam, 1963–69

Answer: Vietnam
Cambodia
Laos