Tensions in the South China Sea increased last April when a Chinese coast guard ship sank a Vietnamese fishing boat near the Paracel Islands—a fiercely disputed territory in the South China Sea. Disputes over island territories in the region have endured for decades, with China, Vietnam, the Philippines, Taiwan, Indonesia, Malaysia, and Brunei all making overlapping territorial claims. The region is rich in natural resources and biodiversity, holding vast fish stocks and an estimated 11 billion barrels of oil and 190 cubic feet of natural gas.