51st state
Guam (formally the Territory of Guam) is an unincorporated and organized territory of the United States. Located in the western Pacific Ocean, Guam is one of five American territories with an established civilian government.
United States nationality law
Separate sections of law handle territories that the United States has acquired over time, such as Alaska and Hawaii , both incorporated, and unincorporated Puerto Rico , the U.S. Virgin Islands , and Guam . Each of these sections confer citizenship on persons living in these territories as of a certain date, and usually confer native-born status on persons born in incorporated territories after that date.