The rise of China presents a major challenge for US strategy in Southeast Asia, the US's allies and key security partners in the region having increasingly to confront a strategic choice between Washington and Beijing. This book assesses how the strategic relationships between the USA and the countries of the region are changing in the light of China's rise. It considers the position for America's formal allies - the Philippines and Thailand, its de facto ally - Singapore, and the other countries of the region - Malaysia, Indonesia and Vietnam - with whom the US has recently had increasingly close ties. The book concludes with an assessment of the overall impact on US strategy in the region.