Territorial disputes in the South China Sea

Disputes over ownership of islands in the South China Sea

Map of various countries' presence in the Spratly Islands as of 2015

Territorial disputes in the South China Sea involve conflicting island and maritime claims in the South China Sea by several sovereign states, namely the People's Republic of China (PRC), Taiwan (Republic of China/ROC), Brunei, Malaysia, the Philippines, Vietnam and Indonesia. The disputes involve the islands, reefs, banks, and other features of the region, including the Spratly Islands, Paracel Islands, Scarborough Shoal, and various boundaries in the Gulf of Tonkin. The waters near the Indonesian Natuna Islands, which some regard as geographically part of the South China Sea, are disputed as well. Maritime disputes also extend beyond the South China Sea, as in the case of the Senkaku Islands and the Socotra Rock, which lie in the East China Sea.[1]

An estimated US$3.37 trillion worth of global trade passes through the South China Sea annually,[2] which accounts for a third of the global maritime trade.[3] 80 percent of China's energy imports and 39.5 percent of China's total trade passes through the South China Sea.[2] Claimant states are interested in retaining or acquiring the rights to fishing stocks, the exploration and potential exploitation of crude oil and natural gas in the seabed of various parts of the South China Sea, and the strategic control of important shipping lanes. Maritime security is also an issue, as the ongoing disputes present challenges for shipping.[4]

In 1932, France formally claimed both the Paracel and Spratly Islands.[5] China and Japan both protested. On 6 April 1933, France occupied the Spratlys, announced their annexation, and formally included them in French Indochina.[6][7]

In 1947, the Republic of China, the government of then China, announced the majority of the South China Sea was its territory. In 1949, the incoming government of China, which overthrew the Republic of China in the Chinese Civil War, announced that it had inherited this claim.[citation needed] A supplemented opinion for the People’s Republic of China’s sovereignty was rejected at the 1951 San Francisco Peace Treaty plenary session; and Tran Van Huu's statement that “in order to annul the seeds of possible disputes, we claim our sovereignty over Hoang Sa and Truong Sa archipelagos” was accepted.[8]

In 2013, the PRC began island building in the Spratly Islands and the Paracel Islands region.[9] During a US Senate hearing in May 2015, then US Assistant Secretary of Defence, David Shear reported that in the Spratly Islands, Vietnam had established 48 outposts, the Philippines had eight, China had eight, Malaysia had five, and Taiwan had one. Shear also noted that from 2009 to 2014, Vietnam was the most active claimant in terms of both upgrading outposts and reclaiming land, with approximately 60 acres reclaimed.[10][11] According to Reuters, island building in the South China Sea, primarily by Vietnam and the Philippines, had been going on for decades on a small scale. And Vietnam, Taiwan, and the Philippines have all deployed military forces on some of their islands, but Vietnam has not stationed any troops on its floating artificial islands. While China had been late to the island-building game, its efforts had been on an unprecedented scale; from 2014 to 2016, it had constructed more new island surface than all other nations have constructed throughout history and (unlike the other claimants) had placed military equipment, at least for a brief period, on one of its artificial islands by 2016.[12] Also, a 2019 report from VOA that compared China and Vietnam's island building campaign in the South China Sea stated that the reason why Vietnam (compared to China) had been subject to little international criticism or support was because of the slower speed and widely perceived defensive nature of its island-building project.[13]

China's actions in the South China Sea have been described as part of its "salami slicing"/"cabbage wrapping" strategies.[14][15] Since 2015, the United States and other states such as France and the United Kingdom have conducted freedom of navigation operations (FONOP) in the region.[16] In July 2016, an arbitration tribunal constituted under Annex VII of the United Nations Convention on the Law of the Sea (UNCLOS) ruled against the PRC's maritime claims in the South China Sea Arbitration.[17] The tribunal did not rule on the ownership of the islands or delimit maritime boundaries.[18][19] Both the People's Republic of China and Taiwan stated that they did not recognize the tribunal and insisted that the matter should be resolved through bilateral negotiations with other claimants.[20] In January 2022, the United States Department of State called China's claims in the South China Sea "unlawful."[21]

Disputes in the South China Sea region

Summary of disputes
Area of dispute
Brunei
China
Indonesia
Malaysia
Philippines
Taiwan
Vietnam
The nine-dash line
Vietnamese coast
Sea area north of Borneo
South China Sea islands
Sea area north of the Natuna Islands
Sea area west of Palawan and Luzon
Sabah area
Luzon Strait
Taiwan and China

The disputes involve both maritime boundaries and islands.[22] There are several disputes, each of which involves a different collection of countries:

  1. The nine-dash line area claimed by the Republic of China (1912–1949), later the People's Republic of China (PRC), which covers most of the South China Sea and overlaps with the exclusive economic zone claims of Brunei, Indonesia, Malaysia, the Philippines, Taiwan, and Vietnam.
  2. Maritime boundary along the Vietnamese coast between the PRC, Taiwan, and Vietnam.
  3. Maritime boundary north of Borneo between the PRC, Malaysia, Brunei, Philippines, and Taiwan.
  4. Islands, reefs, banks and shoals in the South China Sea, including the Paracel Islands, Pratas Island and the Vereker Banks, Macclesfield Bank, Scarborough Shoal and the Spratly Islands between the PRC, Taiwan, and Vietnam, and parts of the area also contested by Malaysia and the Philippines.
  5. Maritime boundary in waters north of the Natuna Islands between the PRC, Indonesia, Taiwan[citation needed] and Vietnam.[23]
  6. Maritime boundary off the coast of Palawan and Luzon between the PRC, the Philippines, and Taiwan.
  7. Maritime boundary, land territory, and the islands of Sabah, including Ambalat, between Indonesia, Malaysia, and the Philippines.
  8. Maritime boundary and islands in the Luzon Strait between the PRC, the Philippines, and Taiwan.
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