United States Indo-Pacific Command

The United States Indo-Pacific Command (USINDOPACOM) is the unified combatant command of the United States Armed Forces responsible for the Indo-Pacific region.

It is the oldest and largest of the unified combatant commands. Its commander, the senior U.S. military officer in the Pacific, is responsible for more than 375,000 service members as well as an area that encompasses more than 100 million square miles (260,000,000 km²), or roughly 52 percent of the Earth's surface, stretching from the waters of the West Coast of the United States to the east coast maritime borderline waters of India at the meridian 66° longitude east of Greenwich and from the Arctic to the Antarctic. Formerly known as 'United States Pacific Command' (USPACOM) since its inception in 1947, the command was renamed to U.S. Indo-Pacific Command in 2018, in recognition of the increasing connectivity between the Indian and Pacific oceans.

The Indo-Pacific Command consists of the component commands U.S. Army Pacific, U.S. Marine Forces Pacific, U.S. Pacific Fleet, U.S. Pacific Air Forces; the subordinate combatant commands U.S. Forces Japan, U.S. Forces Korea (including Special Operations Command Korea) and the Special Operations Command Pacific; the two direct reporting units U.S. Pacific Command Joint Intelligence Operations Center and the Center for Excellence in Disaster Management and Humanitarian Assistance; the standing joint task forces Joint Interagency Task Force West and Joint Task Force Red Hill. The Nimitz-MacArthur Pacific Command Center serves as the headquarters for the Indo-Pacific Command and is located on Camp H. M. Smith in Hawaii.