Guam and Hawaii are part of the second and third island chains, respectively, under a U.S. containment strategy to restrict Russian and Chinese military access to the Pacific Ocean.

A diagram shows the lateral view of Guam in the Pacific Ocean and a path of a military flight that carries a medium-range ballistic missile to a point more than 800 nautical miles, or about 1,500 ...

As the westernmost U.S. territory in the Indo-Pacific, the small island of Guam has been a valuable strategic asset for decades, and today it hosts a growing American military presence.