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Published online by Cambridge University Press: 07 May 2025
Developments in the South China Sea during the first quarter of 2009 reinforced several trends that have been apparent over the past two years. First, the Spratly Islands dispute has once again come to dominate Sino-Philippine relations, despite attempts by Beijing and Manila to move beyond it. Second, China has adopted a more assertive posture toward its territorial and maritime boundary claims in the South China Sea than at any time since the late 1990s. Third, the 2002 breakthrough agreement between the 10 members of the Association of Southeast Asian Nations (ASEAN) and China to manage tensions in the South China Sea is in danger of becoming irrelevant. Fourth, the USNS Impeccable incident on March 8 highlighted the growing strategic importance of the South China Sea for the United States and China, and reawakened concerns in ASEAN capitals that the region may one day become the principal theater wherein Sino-U.S. maritime rivalry is played out.