Vietnam Accelerates South China Sea Land Reclamation Despite Earlier Chinese Claims of Halt

Vietnam dramatically accelerated its effort to expand islands and reclaim land in the contested South China Sea since the start of 2024, marking a significant escalation in the regional competition for territorial control that has defined the waterway for over a decade.

The intensification of Vietnamese reclamation activities comes years after China's own extensive land reclamation campaigns transformed the strategic balance in the disputed Spratly Islands. Between 2013 and the mid-2010s, China undertook extensive reclamation and construction on several reefs in the Spratly Island chain, creating around five square miles of artificial landmasses on seven disputed sites according to DOD estimates.

The Pattern of Reclamation and Militarization

China's reclamation efforts peaked during a period when U.S. officials reported that China reclaimed 1,500 acres of land in the South China Sea in a single year. The scale and speed of Chinese construction included military facilities with a 3,000-metre runway, transforming barren reefs into forward operating bases capable of projecting power across the waterway.

China's Foreign Ministry announced completion of some land reclamation projects on the Spratly Islands, yet subsequent analysis revealed that China continued reclamation in contested waters despite claiming it had halted such activities. This pattern of public statements followed by continued construction became a recurring source of tension with regional claimants and the United States.

President Barack Obama characterized land reclamation projects in the South China Sea as counterproductive and called for an end to them, reflecting broader U.S. concerns about the militarization of disputed features. The Philippines expressed formal concern over China's reclamation activities, highlighting the anxiety among Southeast Asian claimants about Beijing's expanding footprint.

Strategic Infrastructure and Military Capabilities

The constructed outposts now serve as permanent installations supporting sustained military operations. According to the 2021 U.S. Department of Defense China Military Power Report, China's South China Sea outposts are capable of supporting military operations and include advanced weapon systems, fundamentally altering the tactical environment across the disputed waters.

China deploys navy, coast guard, and civilian ships to maintain presence in disputed areas, effectively denying fishing and oil and gas exploration access to rival claimants. This gray-zone strategy leverages the constructed islands as bases for sustained presence operations that fall below the threshold of armed conflict while asserting de facto control.

The strategic value extends beyond the immediate vicinity of the disputed islands. Yulin Navy Base on Hainan Island houses China's growing fleet of nuclear-powered ballistic missile submarines, some of which are dedicated to launching nuclear weapons. The South China Sea reclamation projects provide forward defensive positions protecting this critical strategic asset.

Vietnam's Strategic Response

Vietnam's decision to accelerate its own reclamation activities since 2024 represents a calculated response to China's established presence rather than a mirror of Beijing's earlier approach. Where China's reclamation occurred during a period of relative regional acceptance of such activities, Vietnam now operates in an environment where land reclamation has become synonymous with militarization and territorial assertion.

The timing suggests Vietnamese policymakers concluded that diplomatic protests and multilateral mechanisms proved insufficient to constrain Chinese expansion. Hanoi's acceleration of reclamation activities indicates a shift toward creating facts on the ground to strengthen its own territorial claims through physical presence rather than legal argumentation alone.

This represents a familiar pattern in territorial disputes where initial restraint by one party in the face of another's expansion eventually gives way to competitive responses. We saw this dynamic play out in the 1990s when China's initial construction on Mischief Reef prompted immediate Filipino protests, yet subsequent Chinese expansion across multiple features eventually normalized such activities until they became standard practice for all claimants.

Implications for Regional Stability

The renewed focus on land reclamation by Vietnam signals that the South China Sea dispute has entered a new phase where physical transformation of disputed features has become the primary mechanism for advancing territorial claims. This development complicates diplomatic efforts to manage tensions through confidence-building measures and codes of conduct.

The acceleration of Vietnamese activities also highlights the limitations of international legal mechanisms in constraining territorial competition. Despite the 2016 arbitral tribunal ruling that rejected China's expansive claims, the practical reality remains that physical control often trumps legal arguments in territorial disputes.

For regional security, Vietnam's accelerated reclamation activities risk triggering responsive measures from other claimants, particularly the Philippines, which has historically been more restrained in its own construction activities. The potential for escalating competition in physical transformation of disputed features could undermine existing mechanisms for managing tensions and increase the risk of miscalculation.

The broader strategic context suggests that as long as the underlying sovereignty disputes remain unresolved, claimants will continue to view land reclamation and construction as necessary tools for defending their territorial positions. Vietnam's recent acceleration simply reflects the logic that has driven Chinese behavior for over a decade: in the absence of agreed limitations on such activities, unilateral restraint becomes strategically disadvantageous.

The challenge for regional stability lies in managing this competition without allowing it to escalate into direct confrontation while working toward longer-term mechanisms that can address the underlying sovereignty disputes that drive such behavior.