Geostrategic competition and overseas basing in East Asia and the First Island Chain

Executive summary

Under the U.S. Indo-Pacific strategy, the Department of Defense (DOD) now enfolds East Asia within the broader regional framework of the Indo-Pacific. However, significant U.S. forward presence and the U.S. obligation to defend allied territory in Northeast Asia with ground forces means that the needs and dynamics of great power basing in that region will differ from the maritime theaters of the South Pacific and Indian Oceans. Although the DOD has been simultaneously criticized for being too ambitious or doing too little to address U.S. force posture, geostrategic competition with China dictates prudence in making any major changes to overseas basing in East Asia. Yet Chinese ambitions to strengthen its claims over Taiwan and the South China Sea may require some adjustments to U.S. force posture to surmount evolving challenges within China’s so-called first island chain.¹ For long-term geostrategic competition with China, U.S. force posture in East Asia may be sized correctly but wrongly composed and dispersed. That is, the numbers and strategic concentrations of U.S. forces today in East Asia may be largely right, but their specific capabilities may not always be sufficient — they should continue to evolve, not according to a single grand plan but according to ongoing strategic developments.