History of Cambodia

Cambodia’s landmine problem grew out of a civil war that lasted about 30 years. Knowing the flow of history is the best way to understand why landmines still remain today.

Thanks to years of clearance work, 14 provinces and the capital Phnom Penh (15 administrative units in total) out of the country's 25 provinces and capital municipality have declared themselves mine-free, but minefields remain, mainly in the northwest along the Thai border. Cambodia aims to complete clearance by 2030. (Target year: 2025) [Ref 0084]

The first landmines in Cambodia are said to have been laid in 1967, and over the roughly 30 years of civil war that followed, many different forces used mines. Under the K5 Plan, from around 1985, huge numbers of mines were laid along the Thai border. (Target year: 2023) [Ref 0101]

The Cambodian government estimates that about 4 million landmines were laid in the country. Bombing in the 1960s and 1970s also left large amounts of unexploded ordnance, mainly in the east. (Target year: 2019) [Ref 0104]

Cambodia has set the goal of zero landmines by 2030, and the international community, including Japan, continues to provide support. (Target year: 2026) [Ref 0056]

The story, era by era

→ See every event in the timeline

Sources & references

  1. Ref 0056
  2. Ref 0084

    Clearing the Mines 2025: Cambodia(external site)

    Publisher: Mine Action Review (Norwegian People's Aid) / Published: 2025 / Target year: 2024-2025 / Accessed: 2026-07-11 / Reliability: B

  3. Ref 0101

    Impacts(地雷・不発弾問題の影響)(external site)

    Publisher: Cambodian Mine Action Centre (CMAC) / Target year: 2024 / Accessed: 2026-07-11 / Reliability: A

  4. Ref 0104

    Article 5 Extension Request 2019(第2次延長申請・国家地雷対策戦略2018-2025を含む)(external site)

    Publisher: Kingdom of Cambodia / CMAA (対人地雷禁止条約事務局サイト掲載) / Published: 2019 / Target year: 2018-2019 / Accessed: 2026-07-11 / Reliability: A

  5. Ref 0012

    Cambodian History(external site)

    Publisher: Cambodia Tribunal Monitor (Northwestern University School of Law ほか運営) / Accessed: 2026-07-11 / Reliability: B

  6. Ref 0014

    A Guide to the United States' History of Recognition, Diplomatic, and Consular Relations, by Country, since 1776: Cambodia(external site)

    Publisher: U.S. Department of State, Office of the Historian / Accessed: 2026-07-11 / Reliability: A

  7. Ref 0003

    Historical Context: Who were the Khmer Rouge? (1930-1975)(external site)

    Publisher: Extraordinary Chambers in the Courts of Cambodia (ECCC) / Accessed: 2026-07-11 / Reliability: A

  8. Ref 0013

    Khmer Rouge History(external site)

    Publisher: Cambodia Tribunal Monitor (Northwestern University School of Law ほか運営) / Accessed: 2026-07-11 / Reliability: B

  9. Ref 0009

    Request for an extension of the deadline for completing the destruction of anti-personnel mines in mined areas in accordance with Article 5, paragraph 1 (Second Extension Request)(external site)

    Publisher: Kingdom of Cambodia (Royal Government of Cambodia) / Published: 2019 / Target year: 1992-2025 / Accessed: 2026-07-11 / Reliability: A

  10. Ref 0004

    Historical Context: The Democratic Kampuchea regime (1975-1979)(external site)

    Publisher: Extraordinary Chambers in the Courts of Cambodia (ECCC) / Accessed: 2026-07-11 / Reliability: A

  11. Ref 0015

    Cambodia: The Extraordinary Chambers in the Courts of Cambodia(external site)

    Publisher: United States Holocaust Memorial Museum / Accessed: 2026-07-11 / Reliability: B

  12. Ref 0011

    Cambodia: demining to protect children(external site)

    Publisher: The HALO Trust / Target year: 1979-2024 / Accessed: 2026-07-11 / Reliability: B

  13. Ref 0002

    United Nations Transitional Authority in Cambodia (UNTAC) - Background (Full text)(external site)

    Publisher: United Nations Peacekeeping / Accessed: 2026-07-11 / Reliability: A

  14. Ref 0001

    United Nations Transitional Authority in Cambodia (UNTAC) - Background (Summary)(external site)

    Publisher: United Nations Peacekeeping / Accessed: 2026-07-11 / Reliability: A

  15. Ref 0006

    Organization Profile(external site)

    Publisher: Cambodian Mine Action Centre (CMAC) / Accessed: 2026-07-11 / Reliability: A

  16. Ref 0007

    Impacts(external site)

    Publisher: Cambodian Mine Action Centre (CMAC) / Target year: 1992-2024 / Accessed: 2026-07-11 / Reliability: A

  17. Ref 0008

    Cambodia | Membership(external site)

    Publisher: Anti-Personnel Mine Ban Convention Implementation Support Unit / Accessed: 2026-07-11 / Reliability: A

  18. Ref 0005

    ECCC Homepage (About the Court)(external site)

    Publisher: Extraordinary Chambers in the Courts of Cambodia (ECCC) / Accessed: 2026-07-11 / Reliability: A

  19. Ref 0010

    Cambodia - Anti-Personnel Mines(external site)

    Publisher: Mine Action Review / Target year: 2024-2025 / Accessed: 2026-07-11 / Reliability: B

著作権について

J-Catalystに掲載している文章・写真・図版・デザイン・データおよびシステムの著作権は、合同会社J-Catalystまたは正当な権利者に帰属します。著作権法で認められた範囲を超えてのご利用は、事前の許諾が必要です。

引用・紹介・取材・転載・共同企画・データやシステムのご利用をご希望の場合は、お問い合わせよりご相談ください。内容をうかがったうえで、可能な形をご案内します。

ご相談・お問い合わせ

Copyright for all text, images, design, data and systems on this site belongs to J-Catalyst LLC or the respective rights holders. Use beyond what is permitted by copyright law requires prior permission. For quotation, coverage, republication, collaboration, or use of our data and systems, please contact us.

© 2026 J-Catalyst LLC(合同会社J-Catalyst) All rights reserved. — 2026-08-04b
← J-Catalyst Portal