Which of the possessions or protectorates was closest to the United states?

Guam, a territory in the western Pacific Ocean, is the closest possession or protectorate to the United States. It is approximately 3,800 miles away from the west coast of the U.S., making it the closest geographically. Guam has been a U.S. territory since 1898 and plays a strategic role in U.S. military operations in the Asia-Pacific region.