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Could Vietnam’s new South China Sea bases open a ‘Pandora’s box’ of competitive island building?

Chatham House | 2026-03-19 | china_indopacific

Topics: China, Taiwan

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Vietnam is rapidly expanding its military footprint in the South China Sea by conducting land reclamation and infrastructure development across all 21 of its controlled features in the Spratly Islands. This strategic move, which includes building harbors and airstrips, aims to counter China's established presence and assert sovereignty over contested maritime zones. The escalation of competitive island building among regional claimants increases the risk of maritime clashes and threatens the stability of vital global shipping lanes. Ultimately, this militarization could trigger a broader cycle of regional tension, complicating international efforts to maintain a free and open Indo-Pacific.

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