USNORTHCOM is tasked with providing protection to territories and national interests within the contiguous United states, Alaska, Canada and Mexico. This includes provision of military support to civil authorities within the U.S. if needed...

EUCOM is responsible for 21,000,000 square miles including 51 countries and territories. This area encompasses Europe, Greenland, Russia and Isreal. Headquartered at Patch Barracks in Stuttgart, Germany.   

USJFCOM is a former Unified Combatant Command of the DoD. This command was disestablished in 2011 and its essential functions reassigned. This command was headquartedd in Norfolk, Virgina.