This CRS report addresses the developments of U.S. defense deployments in Guam. "The U.S. military is building up forces on the U.S. territory of Guam to increase deterrence and power projection for possible responses to crises and disasters, counterterrorism, and contingencies in support of South Korea, Japan, the Philippines, Taiwan, or elsewhere in Asia. But the defense buildup on Guam is moderate. Guam's role has increased with plans to withdraw some U.S. forces from Japan and South Korea. The buildup will cost $10.3 billion, with Japan contributing about 60% ($6.1 billion). Updated as warranted, this CRS Report discusses developments and policy issues."
CRS Report for Congress, RS22570