U.S. Homeland

The physical territory of the United States: the 50 states, District of Columbia, US territories and territorial waters; significant infrastructure linked to the United States; and major commercial air, land and sea corridors into the country.

Source: Terms & Definitions of Interest for DoD Counterintelligence Professionals, Office of the National Counterintelligence, https://www.dni.gov/files/NCSC/documents/ci/CI_Glossary.pdf