Disputes - international: maritime boundary with Cambodia not defined; involved in a complex dispute over the Spratly Islands with China, Malaysia, Philippines, Taiwan, and possibly Brunei; maritime boundary with Thailand resolved, August 1997; maritime boundary dispute with China in the Gulf of Tonkin; Paracel Islands occupied by China but claimed by Vietnam and Taiwan; offshore islands and sections of boundary with Cambodia are in dispute; agreement on land border with China was signed in December 1999, but details of alignment have not been made public
Illicit drugs: minor producer of opium poppy with 2,100 hectares cultivated in 1999, capable of producing 11 metric tons of opium; probably minor transit point for Southeast Asian heroin destined for the US and Europe; growing opium/heroin addiction; possible small-scale heroin production
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