East Asia Maritime Monitor

Asia’s geopolitical tensions are largely playing out at sea. 

The South China Sea is one of the world’s most contested maritime zones, defined by overlapping sovereignty claims, intensifying United States-China strategic rivalry, and its critical position between the Pacific and Indian Oceans. It sits at the nexus of global trade routes, fisheries, energy resources, international law, and regional security dynamics. 

Rising tensions between China and Association of Southeast Asian Nations claimant states have turned the region into a persistent arena of strategic competition, characterized by coercive diplomacy, maritime militarization, and dense gray-zone operations that remain below the threshold of open conflict.

The Taiwan Strait is a critical maritime and trade corridor where conflicting sovereignty claims, military and law enforcement activities, and geopolitical rivalries intersect. Located within the so-called First Island Chain, Taiwan’s unresolved political status makes it a central focal point in US-China strategic competition and Indo-Pacific security. Beijing claims sovereignty over Taiwan and aims for reunification. It also routinely deploys naval, coast guard, and maritime law enforcement vessels around the island and its outlying territories. 

These operations normalize Beijing’s maritime presence, test Taiwan’s defenses, and challenge Taipei’s jurisdiction across the Taiwan Strait. Compounded by broader tensions in the South China Sea and along the First Island Chain, friction in the Taiwan Strait carries significant regional and international security implications.