USPACOM is the largest and oldest of the unified combatant commands. This command was renamed the U.S. Indo-Pacific Command on May 30th, 2018. The Headquarters of this command is located at Camp H. M. Smith in Oahu, Hawaii.

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.