Temple of Preah Vihear (Cambodia v Thailand) - Border Dispute
By Anthony Marinac
Key Concepts:
- Khmer Empire
- Angkor Wat
- Preah Vihear Temple
- Watershed Line
- Siam (Thailand)
- French Protectorate (Cambodia)
- Boundary Agreements
- Implied Acceptance
- International Court of Justice (ICJ)
- Territorial Dispute
- Frontier Line
Historical Context and Temple Significance:
In the 9th century, the Khmer Empire dominated Southeast Asia, constructing grand temples dedicated initially to Hindu gods, later converted to Buddhism. Angkor Wat stands as the most renowned, but Preah Vihear Temple, dating back 1200 years, is located further north and is also significant.
The Boundary Dispute:
In the early 1900s, Siam (modern Thailand) and French-protected Cambodia sought to define their boundaries, primarily using natural features like the watershed line. While the watershed line generally suggested the temple was in Siamese territory, the imprecision of natural boundaries necessitated detailed mapping. Around 1904, Siam requested French surveyors to map the border. These maps, used officially by the Siamese government for many years, placed Preah Vihear Temple on the Cambodian side.
Escalation and International Court of Justice:
In the 1950s, newly independent Cambodia found Thai troops at the temple site, leading to both countries claiming ownership. Unable to resolve the dispute, Cambodia appealed to the International Court of Justice (ICJ).
ICJ Ruling and Rationale:
The ICJ acknowledged that the maps placing the temple in Cambodia were never formally agreed upon in a treaty. However, the court ruled that Thailand's decades-long use and implied acceptance of the maps' accuracy prevented them from challenging them later. The court stated, "Thailand recognised the line on the map as being the frontier line the effect of which is to situate pre-over here in cambodian territory looked at as a whole thailand's subsequent conduct confirms and bears out her original acceptance both parties by their conduct recognized the line and thereby in effect agreed to regard it as being the frontier line".
Legal Principles and Implications:
The Preah Vihear Temple case demonstrates that national borders can be established not only by treaty but also by the conduct of the nations involved. Thailand's actions over time constituted an implied acceptance of the border as depicted on the French-produced maps.
Conclusion:
The Preah Vihear Temple dispute highlights the complexities of border demarcation and the significance of a nation's conduct in establishing territorial boundaries. The ICJ's ruling underscores that implied acceptance, through consistent actions and recognition, can solidify a border even in the absence of a formal treaty. The case serves as a reminder that historical maps and a nation's behavior can have lasting legal consequences in international territorial disputes.
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