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'''U.S. Northern Command''' (USNORTHCOM) is headquartered at Peterson Air Force Base in Colorado Springs, Colorado. The Department of Defense established U.S. Northern Command in 2002 to consolidate under a single unified command existing missions that were previously executed by other military organizations.

The command's mission is homeland defense and civil support, specifically: Conduct operations to deter, prevent, and defeat threats and aggression aimed at the United States, its territories, and interests within the assigned area of responsibility; and, as directed by the President or Secretary of Defense, provide military assistance to civil authorities including consequence management operations.

'''Homeland Security vs Homeland Defense'''[http://www.northcom.mil/index.cfm?fuseaction=s.homeland] from the USNORTHCOM web site: