Crucially, the sea is also a vital fishing ground, providing protein and income for tens of millions of people across the region. For nations like Vietnam and the Philippines, access to these waters is not just an economic issue; it is a matter of food security and rural employment. At the heart of the tension lies a complex web of overlapping territorial claims. The primary claimants—China, Vietnam, the Philippines, Malaysia, Brunei, and Taiwan—assert rights based on historical maps, proximity, or the United Nations Convention on the Law of the Sea (UNCLOS).
Key locations like now function as military outposts. While China describes these facilities as civilian and defensive in nature—useful for navigation safety and disaster response—neighboring nations and the Pentagon see them as offensive forward operating bases. They allow the People’s Liberation Army Navy (PLAN) to project power deep into the sea, challenging the decades-old U.S.-dominated naval order. The Role of External Powers: The United States and Allies No discussion of the South China Sea is complete without addressing the role of the United States. As the region’s preeminent external security partner, Washington has maintained a policy of “freedom of navigation” (FONOPs). Regularly, U.S. Navy warships sail within 12 nautical miles of Chinese-claimed features, a direct challenge to what Washington considers excessive maritime claims. south china sea
The Biden administration has reaffirmed the U.S. commitment to its treaty allies—the Philippines, Japan, South Korea, and Australia—while deepening security ties with Vietnam and Malaysia. The pact (Australia, U.K., U.S.) and intensified joint naval drills are signals that Washington will not cede strategic control of the sea lanes. Crucially, the sea is also a vital fishing
Stretching over 3.5 million square kilometers from the straits of Taiwan and Malacca to the busy ports of Vietnam and the Philippines, the South China Sea is far more than a body of water. It is a geopolitical fulcrum, an economic artery, and a growing flashpoint for great-power competition. For the nations that border it—Brunei, China, Indonesia, Malaysia, the Philippines, Taiwan, and Vietnam—the sea represents national livelihood, historical heritage, and strategic depth. For the rest of the world, particularly the United States and its allies, it is a test case for the future of the international rules-based order. To understand the stakes, one must first look at the sheer volume of commerce that transits these waters. Approximately one-third of global shipping passes through the South China Sea each year, carrying over $3 trillion in trade. From oil and liquefied natural gas from the Middle East to manufactured goods from China and electronics from Southeast Asia, the sea is the world’s busiest maritime corridor. They allow the People’s Liberation Army Navy (PLAN)
