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Bolivia and Paraguay settle border dispute after nearly nine decades

The two South American nations have finally resolved their boundary following nearly 90 years of negotiations stemming from a devastating regional conflict. The agreement marks the completion of a demarcation process that began in the late 1930s.

LSN Malaysia · 17 September 2026

Bolivia and Paraguay settle border dispute after nearly nine decades

Bolivia and Paraguay have concluded their long-standing border demarcation process, bringing an end to nearly nine decades of diplomatic negotiations between the two nations. The agreement formalises the boundary line along their shared 755-kilometre frontier, a matter that has remained unresolved since the conclusion of a major regional conflict in the mid-20th century.

The dispute's roots trace back to the Chaco War, a brutal military conflict fought between 1932 and 1935 that left thousands dead and devastated the region. Following the cessation of hostilities, a 1938 treaty formally initiated the process of demarcating the border, though subsequent negotiations proved lengthy and complex.

The finalisation of the border agreement represents a significant milestone for diplomatic relations between the two countries. The resolution of longstanding territorial questions is expected to enhance regional stability and facilitate deeper economic and political cooperation between Bolivia and Paraguay.

Border demarcation in South America has historically presented considerable challenges due to geographical complexities and competing historical claims. The completion of this process demonstrates the commitment of both nations to resolving differences through sustained dialogue and negotiation.