The Spratly Islands (Chinese: Nansha; Vietnamese: Trường Sa; Filipino: Kapuluan ng Kalayaan) are a scattered group of more than 100 small features in the southern South China Sea. Few are naturally habitable, but the surrounding waters host major fisheries, shipping lanes, and suspected hydrocarbon reserves, making the archipelago one of the most contested maritime spaces in the world.
Six parties assert overlapping claims: China, Taiwan, Vietnam, the Philippines, Malaysia, and Brunei. China and Taiwan claim the entire group on historical grounds, framed by China's "nine-dash line." Vietnam claims the full archipelago as Trường Sa. The Philippines claims a subset it calls the Kalayaan Island Group. Malaysia claims features off its Sabah coast, and Brunei asserts maritime zones but occupies no features.
Several claimants physically occupy outposts. Taiwan administers Itu Aba (Taiping), the largest natural feature. Vietnam holds the largest number of occupied features. China has built large artificial islands at sites including Fiery Cross, Subi, and Mischief Reef, adding runways, radar, and missile facilities since roughly 2013–2015. The Philippines maintains a garrison on Thitu (Pag-asa), and Malaysia occupies several southern reefs.
The legal status of the features was central to Philippines v. China (2016), in which an arbitral tribunal constituted under Annex VII of UNCLOS ruled that none of the Spratly features qualify as fully entitled islands generating exclusive economic zones, that China's nine-dash-line claim to historic rights had no legal basis, and that China had violated Philippine sovereign rights at Mischief Reef and Second Thomas Shoal. China rejected the ruling.
Flashpoints recur around Second Thomas Shoal (Ayungin), where the Philippines grounded the BRP Sierra Madre in 1999 as a sovereignty marker, and around fishing and resupply incidents involving coast guard and maritime militia vessels. ASEAN and China have negotiated a Code of Conduct since 2002 without concluding it.
Example
In July 2016, an UNCLOS Annex VII tribunal in *Philippines v. China* ruled that no Spratly feature generates an exclusive economic zone and that China's nine-dash-line claim had no legal basis.
Frequently asked questions
Vietnam occupies the largest number of features, while China controls the most heavily militarized artificial islands and Taiwan holds Itu Aba, the largest natural feature.
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