United States Indo-Pacific Command (USINDOPACOM) is a
unified combatant command
A unified combatant command (CCMD), also referred to as a combatant command, is a joint military command of the United States Department of Defense that is composed of units from two or more service branches of the United States Armed Forces, an ...
of the
United States Armed Forces
The United States Armed Forces are the military forces of the United States. The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is ...
responsible for the
Indo-Pacific region
The Indo-Pacific is a vast biogeography, biogeographic region of Earth.
In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific O ...
.
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
Indian or Indians may refer to:
Peoples South Asia
* Indian people, people of Indian nationality, or people who have an Indian ancestor
** Non-resident Indian, a citizen of India who has temporarily emigrated to another country
* South Asia ...
and
Pacific
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contine ...
oceans.
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 military operations in an area that encompasses more than , or roughly 52 percent of the Earth's surface, stretching from the waters of the
West Coast of the United States
The West Coast of the United States, also known as the Pacific Coast, Pacific states, and the western seaboard, is the coastline along which the Western United States meets the North Pacific Ocean. The term typically refers to the contiguous U.S ...
to the east coast maritime borderline waters of
Pakistan
Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's fifth-most populous country, with a population of almost 243 million people, and has the world's second-lar ...
at the meridian 66° longitude east of Greenwich and from the Arctic to the Antarctic.
The commander reports to the
President of the United States
The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States ...
through the Secretary of Defense and is supported by service component and subordinate unified commands, including
U.S. Army Pacific
The United States Army Pacific (USARPAC) is an Army Service Component Command (ASCC) designated by the United States Secretary of the Army, Secretary of the Army (SECARMY); it may also serve as a Joint Task Force headquarters. It is the army comp ...
U.S. Pacific Fleet
The United States Pacific Fleet (USPACFLT) is a theater-level component command of the United States Navy, located in the Pacific Ocean. It provides naval forces to the Indo-Pacific Command. Fleet headquarters is at Joint Base Pearl Harbor ...
,
Pacific Air Forces
Pacific Air Forces (PACAF) is a Major Command (MAJCOM) of the United States Air Force and is also the air component command of the United States Indo-Pacific Command (USINDOPACOM). PACAF is headquartered at Joint Base Pearl Harbor–Hickam (f ...
,
U.S. Forces Japan
is a subordinate unified command of the United States Indo-Pacific Command (USINDOPACOM). It was activated at Fuchū Air Station in Tokyo, Japan, on 1 July 1957 to replace the Far East Command. USFJ is commanded by the Commander, US Forces ...
Special Operations Command Korea
Special Operations Command Korea or SOCKOR, the United States (U.S.) Theater Special Operations Command (TSOC) in the Republic of Korea (ROK), is a Sub-Unified Command assigned under the Combatant Command (COCOM) of United States Special Operati ...
, and
Special Operations Command Pacific
The Special Operations Command Pacific, known as SOCPAC, is a sub-unified command of the United States Department of Defense for special operations forces in the United States Indo-Pacific Command (USINDOPACOM) area of responsibility.
History
Th ...
. USINDOPACOM also has two direct reporting units (DRUs)—U.S. Pacific Command Joint Intelligence Operations Center (JIOC) and the
Center for Excellence in Disaster Management and Humanitarian Assistance
The Center for Excellence in Disaster Management and Humanitarian Assistance (CFE) is a direct reporting unit to the U.S. Indo-Pacific Command (USINDOPACOM) and principal agency to promote disaster preparedness and societal resiliency in the Asi ...
(CFE-DMHA), as well as a Standing Joint Task Force, Joint Interagency Task Force West (JIATF-W). The USINDOPACOM headquarters building, the Nimitz-MacArthur Pacific Command Center, is located on Camp H. M. Smith, Hawaii.
Mission
United States Indo-Pacific Command protects and defends, in concert with other U.S. Government agencies, the territory of the United States, its people, and its interests. With allies and partners, we will enhance stability in the Indo-Asia-Pacific region by promoting security cooperation, encouraging peaceful development, responding to contingencies, deterring aggression, and, when necessary, fighting to win. This approach is based on partnership, presence, and military readiness.
We recognize the global significance of the Indo-Asia-Pacific region and understand that challenges are best met together. Consequently, we will remain an engaged and trusted partner committed to preserving the security, stability, and freedom upon which enduring prosperity in the Indo-Asia-Pacific region depends. We will collaborate with the Services and other Combatant Commands to defend America's interests.
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contin ...
from Antarctica at 92°W, north to 8°N, west to 112°W, northwest to 50°N/142°W, west to 170°E, north to 53°N, northeast to 62°30’N/175°W, north to 64°45’N/175°W, south along the Russian territorial waters to the
People's Republic of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
,
Mongolia
Mongolia; Mongolian script: , , ; lit. "Mongol Nation" or "State of Mongolia" () is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of , with a population of just 3.3 million, ...
Republic of Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its ea ...
Southeast Asia
Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical south-eastern region of Asia, consisting of the regions that are situated south of mainlan ...
and the southern Asian landmass to the western border of
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
; the
Indian Ocean
The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
east and south of the line from the
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
coastal border west to 68°E, south along 68°E to Antarctica; Australia;
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...
;
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest cont ...
, and
Hawaii
Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only state ...
.
In all, it encompasses:
* 36 nations
* More than half the world's population
* 3,200 different languages
* 5 of 7 collective defense treaties
Force structure
Component commands
Subordinate unified commands
Direct reporting units
Standing joint task force
Ballistic missile warning for the United States outside of NORAD: Hawaii, Guam, & the Pacific region
In the Pacific Region, instead of NORAD, the United States Indo-Pacific Command must make the decision that an incoming ballistic missile is a threat to the United States. Hawaii is the only state in the United States with a pre-programmed Wireless Emergency Alert that can be sent quickly to wireless devices if a ballistic missile is heading toward Hawaii. If the missile is fired from North Korea, the missile would take approximately 20 minutes to reach Hawaii. The United States Indo-Pacific Command would take less than 5 minutes to make a determination that the missile could impact Hawaii and would then notify the Hawaii Emergency Management Agency (HI-EMA). HI-EMA would issue the Civil Defense Warning (CDW) that an inbound missile could impact Hawaii and that people should
Shelter-in-Place
Shelter-in-place (SIP; also known as a shelter-in-place warning, SAME code SPW) is the act of seeking safety within the building one already occupies, rather than evacuating the area or seeking a community emergency shelter. The American Red Cro ...
: ''Get Inside, Stay Inside, and Stay Tuned''. People in Hawaii would have 12 to 15 minutes before impact. Federal Emergency Management Agency (FEMA) is not required to be notified for approval to cancel an alert. Signal carriers allow people to block alerts from state and law enforcement agencies, but not those issued by the President. FEMA can send alerts to targeted audiences but has not implemented this as of January 2018. Other states can take as long as 30 minutes to create, enter and distribute a missile alert. The Wireless Emergency Alert system was tested nationally for the first time in October 2018. And as part of the 2020 National Defense Authorization Act, the role of issuing warnings of a missile threat would lie with the Federal Government, as opposed to individual states.
History
Establishment of unified commands in the Pacific
USINDOPACOM has evolved through the gradual consolidation of various commands in the Pacific and Far East. Its origins can be traced to the command structure established early in World War II to wage the war in the Pacific.
In April 1942, U.S. military forces in the Pacific Theatre were divided into two commands: the
South West Pacific Area
South West Pacific Area (SWPA) was the name given to the Allied supreme military command in the South West Pacific Theatre of World War II. It was one of four major Allied commands in the Pacific War. SWPA included the Philippines, Borneo, the ...
(SWPA) under Army
General Douglas MacArthur
Douglas MacArthur (26 January 18805 April 1964) was an American military leader who served as General of the Army for the United States, as well as a field marshal to the Philippine Army. He had served with distinction in World War I, was ...
; and the
Pacific Ocean Areas
Pacific Ocean Areas was a major Allied military command in the Pacific Ocean theater of World War II. It was one of four major Allied commands during the Pacific War, and one of three United States commands in the Asiatic-Pacific Theater. Admir ...
(POA) under Navy
Admiral Chester W. Nimitz
Chester William Nimitz (; February 24, 1885 – February 20, 1966) was a Fleet admiral (United States), fleet admiral in the United States Navy. He played a major role in the naval history of World War II as Commander, U.S. Pacific Fle ...
. Each had command of all U.S. military forces assigned to his area. The authority of the POA Commander-in-Chief (CINCPOA) was technically separate from that of the Commander in Chief, Pacific Fleet (CINCPAC), but Admiral Nimitz was assigned to both positions and bore the title CINCPAC/CINCPOA.
Efforts to establish a unified command for the entire Pacific AOR proved impossible during the war. The divergent interests of the Army and the Navy precluded the subordination of either of the two principal commanders in the Pacific Theatre. When the war ended in September 1945, the command arrangement carried forward with Fleet Admiral Nimitz as CINCPAC/CINCPOA and General of the Army MacArthur as Commander in Chief, U.S. Army Forces Pacific (CINCAFPAC).
Command arrangements after World War II were defined by the "Outline Command Plan"– in a sense, the first Unified Command Plan (UCP)– approved by President Harry S. Truman on 14 December 1946 and authorized by the National Security Act of 1947. The plan called for the establishment of seven
unified combatant commands
A unified combatant command (CCMD), also referred to as a combatant command, is a joint military command of the United States Department of Defense that is composed of units from two or more service branches of the United States Armed Forces, ...
as "an interim measure for the immediate postwar period."
The first three unified commands were established in the Pacific. The
Joint Chiefs of Staff
The Joint Chiefs of Staff (JCS) is the body of the most senior uniformed leaders within the United States Department of Defense, that advises the president of the United States, the secretary of defense, the Homeland Security Council and the ...
implementing directive of 16 December 1946 established the Far East Command (FECOM), Pacific Command (PACOM), and Alaskan Command (ALCOM) effective 1 January 1947. The commands, their areas of responsibility, and their missions were as follows:
* Far East Command: U.S. forces in Japan,
Korea
Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic o ...
, the
Ryukyus
The , also known as the or the , are a chain of Japanese islands that stretch southwest from Kyushu to Taiwan: the Ōsumi, Tokara, Amami, Okinawa, and Sakishima Islands (further divided into the Miyako and Yaeyama Islands), with Yonaguni ...
, the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
Bonin Islands
The Bonin Islands, also known as the , are an archipelago of over 30 subtropical and tropical islands, some directly south of Tokyo, Japan and northwest of Guam. The name "Bonin Islands" comes from the Japanese word ''bunin'' (an archaic read ...
. The Commander-in-Chief, Far East (CINCFE) would carry out occupation duties, maintain the security of the command, plan and prepare for a general emergency in the area, support the Commander-in-Chief, Pacific (CINCPAC), and command U.S. forces in China in an emergency.
* Pacific Command: U.S. forces allocated by the Joint Chiefs of Staff within the Pacific Area. CINCPAC would defend the United States against attack through the Pacific, conduct operations in the Pacific, maintain the security of U.S. island positions and of sea and air communications, support U.S. military commitments in China, plan and prepare for a general emergency, and support CINCFE and Commander-in-Chief, Alaskan Command (CINCAL).
* Alaskan Command: U.S. forces in
Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...
, including the
Aleutian Islands
The Aleutian Islands (; ; ale, Unangam Tanangin,”Land of the Aleuts", possibly from Chukchi ''aliat'', "island"), also called the Aleut Islands or Aleutic Islands and known before 1867 as the Catherine Archipelago, are a chain of 14 large v ...
. CINCAL would protect Alaska and its sea and air communications, defend the United States from attack through Alaska and the Arctic, plan and prepare for a general emergency, and support CINCFE, CINCPAC, and the Commanding General of the Strategic Air Command (CG SAC).
General of the Army Douglas MacArthur was appointed CINCFE; Army Major General
Howard A. Craig
Howard is an English-language given name originating from Old French Huard (or Houard) from a Germanic source similar to Old High German ''*Hugihard'' "heart-brave", or ''*Hoh-ward'', literally "high defender; chief guardian". It is also proba ...
John Henry Towers
John Henry Towers CBE (January 30, 1885 – April 30, 1955) was a highly decorated United States Navy four-star Admiral and pioneer naval aviator. He made important contributions to the technical and organizational development of naval aviation ...
was designated CINCPAC. At the time of appointment, he was serving as Admiral Nimitz's direct successor as CINCPAC/CINCPOA. Admiral Towers retained his position as Commander-in-Chief,
U.S. Pacific Fleet
The United States Pacific Fleet (USPACFLT) is a theater-level component command of the United States Navy, located in the Pacific Ocean. It provides naval forces to the Indo-Pacific Command. Fleet headquarters is at Joint Base Pearl Harbor ...
; his title was abbreviated CINCPACFLT to avoid confusion with the newly established Pacific Command. Headquarters for both CINCPAC and CINCPACFLT were located at Makalapa,
Pearl Harbor
Pearl Harbor is an American lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. It was often visited by the Naval fleet of the United States, before it was acquired from the Hawaiian Kingdom by the U.S. with the signing of the R ...
Burma
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...
and the eastern
Indian Ocean
The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
to the west coast of the Americas. Following a 1949 review of missions and deployments of U.S. forces, the Joint Chiefs of Staff revised the Unified Command Plan on 16 February 1950. The
Volcano Islands
The or are a group of three Japanese-governed islands in Micronesia. They lie south of the Ogasawara Islands and belong to the municipality of Ogasawara, Tokyo, Tokyo Metropolis, Japan. The islands are all active volcanoes lying atop ...
were transferred to FECOM's AOR; likewise, responsibility for South Korea was transferred from FECOM to PACOM. The duty of protecting the
Panama Canal
The Panama Canal ( es, Canal de Panamá, link=no) is an artificial waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean and divides North and South America. The canal cuts across the Isthmus of Panama and is a condui ...
remained assigned to Commander in Chief, Atlantic Command (CINCLANT); one year later, however, the Western approaches to the Canal would be reassigned to CINCPAC.
The Korean War
The outbreak of the
Korean War
, date = {{Ubl, 25 June 1950 – 27 July 1953 (''de facto'')({{Age in years, months, weeks and days, month1=6, day1=25, year1=1950, month2=7, day2=27, year2=1953), 25 June 1950 – present (''de jure'')({{Age in years, months, weeks a ...
and subsequent developments in the Far East tested the U.S. unified command structure in the Pacific. Although General MacArthur, as CINCFE, had been relieved of responsibility for South Korea, early U.S. reaction to
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korean Peninsula and shares borders with China and Russia to the north, at the Yalu (Amnok) and T ...
's invasion of the South on 25 June 1950 came through his command. On 10 July, at the request of the
United Nations
The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoniz ...
, President Truman directed General MacArthur to establish the United Nations Command (UNC) for the purpose of directing operations against North Korean forces. U.S. forces assigned to FECOM were assigned to UNC with General MacArthur designated Commander-in-Chief, UNC (CINCUNC). The primary responsibility of CINCFE, however, remained the defense of Japan. During the war, CINCPAC was ordered to support CINCUNC/CINCFE.
With CINCFE focused on combat operations during the Korean War, the Joint Chiefs of Staff, over strong objection from FECOM, transferred the Mariana, Bonin and Volcano Islands to PACOM. In late 1951, PACOM was also assigned responsibility for the Philippines, the
Pescadores
The Penghu (, Hokkien POJ: ''Phîⁿ-ô͘'' or ''Phêⁿ-ô͘'' ) or Pescadores Islands are an archipelago of 90 islands and islets in the Taiwan Strait, located approximately west from the main island of Taiwan, covering an area ...
The new Unified Command Plan approved by Secretary of Defense Charles Wilson on 21 June 1956 produced significant changes to the command structure in the Pacific. ALCOM would remain as a unified command because of its strategic location, retaining its mission for the ground defense of the Alaskan region. Its other responsibilities, however, were reduced: the duty for the protection of sea communications in Alaskan waters was assumed by PACOM. The responsibilities of the Continental Air Defense Command (CONAD) would be likewise expanded to include the air defense of Alaska and the Northeast.
UCP 1956 also disestablished FECOM as a separate unified command. U.S. military deployments to Japan and Korea were decreasing after the end of Japanese reconstruction and the Korean War. The JCS, therefore, believed that the divided command structure in the Pacific should be abolished and FECOM's responsibility reassigned to PACOM. A subsequent outline plan to disestablish FECOM and transfer its responsibilities was approved by SECDEF and the JCS effective 1 July 1957. Under the plan, two subordinate unified commands under CINCPAC were established: Commander,
U.S. Forces Japan
is a subordinate unified command of the United States Indo-Pacific Command (USINDOPACOM). It was activated at Fuchū Air Station in Tokyo, Japan, on 1 July 1957 to replace the Far East Command. USFJ is commanded by the Commander, US Forces ...
(COMUSJAPAN) and Commander, U.S. Forces Korea (COMUSKOREA). The latter was dual-hatted as CINCUNC.
The UCP further specified that no unified commander would exercise direct command of any of its Service components or subordinate commands. As such, Admiral Felix Stump gave up direct command of the Pacific Fleet, delegating the responsibility of CINCPACFLT to his Deputy, Admiral Maurice E. Curts. CINCPAC's staff was thereafter separated from CINCPACFLT's staff and moved from
Pearl Harbor
Pearl Harbor is an American lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. It was often visited by the Naval fleet of the United States, before it was acquired from the Hawaiian Kingdom by the U.S. with the signing of the R ...
to a new headquarters building (the former Aiea Naval Hospital) at Camp H.M. Smith. Service components for the Army and Air Force– U.S. Army Pacific (USARPAC) and U.S. Pacific Air Forces (PACAF)– were also assigned to PACOM.
The Vietnam War
Command over U.S. forces engaged in the
Vietnam War
The Vietnam War (also known by other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam a ...
was designated by CINCPAC to three subordinate commands. U.S. Military Assistance Command, Vietnam (USMACV), activated 8 February 1962 to direct U.S. support to South Vietnam's military forces, largely controlled all U.S. forces and operations within South Vietnam.
Naval gunfire support
Naval gunfire support (NGFS) (also known as shore bombardment) is the use of naval artillery to provide fire support
Fire support is defined by the United States Department of Defense as " Fires that directly support land, maritime, amphibiou ...
and
air strikes
An airstrike, air strike or air raid is an offensive operation carried out by aircraft. Air strikes are delivered from aircraft such as blimps, balloons, fighters, heavy bombers, ground attack aircraft, attack helicopters and drones. The offic ...
on targets in Vietnam, however, were delegated to PACFLT and the U.S. 7th Fleet. PACAF and PACFLT were responsible for conducting air and naval operations against North Vietnam and Laos. Control of B-52s employed to conduct airstrikes against targets in South Vietnam remained under the Strategic Air Command.
Command adjustments, 1971–1979
A new Unified Command Plan was approved in 1971. Effective 1 January 1972, the Pacific Command assumed responsibility for the Indian Ocean and the countries of southern Asia extending westward to the eastern border of Iran (which then fell under
EUCOM
The United States European Command (EUCOM) is one of the eleven Unified Combatant Command, unified combatant commands of the United States military, headquartered in Stuttgart, Germany. Its area of focus covers and 51 countries and territorie ...
's responsibility). The Alaskan Command transferred responsibility for the Aleutian Islands and parts of the Arctic Ocean to PACOM, as well. ALCOM would remain a distinct unified command until it was disestablished by another Unified Command Plan on 1 July 1975. An amendment to this plan on 1 May 1976 adjusted PACOM's boundaries yet again. The amendment gave CINCPAC responsibility for the entire Indian Ocean to the east coast of Africa, including the Gulfs of Aden and
Oman
Oman ( ; ar, عُمَان ' ), officially the Sultanate of Oman ( ar, سلْطنةُ عُمان ), is an Arabian country located in southwestern Asia. It is situated on the southeastern coast of the Arabian Peninsula, and spans the mouth of ...
and all of the Indian Ocean Islands excepting the Malagasy Republic. This decision expanded PACOM's AOR across more than 50% of the Earth's surface an area of over 100 million square miles.
U.S. Army Pacific (USARPAC) was disestablished 31 December 1974 as part of a bid by the Army to reduce its headquarters. The much smaller U.S. Army CINCPAC Support Group (CSG) took over USARPAC's duty to assist and coordinate with CINCPAC Headquarters and PACOM service components on Army matters. In 1979, U.S. Army Western Command (WESTCOM) was activated as the new Army component for PACOM. WESTCOM was redesignated USARPAC effective 30 August 1990.
Unified Command Plan of 1983
The establishment of U.S. Central Command (USCENTCOM) for the Middle East on 1 January 1983 resulted in the reassignment of responsibilities from PACOM to the new command. CENTCOM took responsibility for Afghanistan and Pakistan from PACOM; the India-Pakistan border became the boundary between CENTCOM and PACOM.
Despite the adjustment, UCP 1983 actually increased the size of PACOM's AOR. The Joint Chiefs of Staff assigned responsibility for China to PACOM, presuming that increased political-military contacts between China and the United States could best be handled at the unified command level. A similar decision was made to assign North Korea to PACOM, reasoning that unifying responsibility for the Korean Peninsula under CINCPAC would greatly enhance his ability to make the transition from peace to war should he be called upon to do so. Madagascar was assigned to PACOM because the island impinged directly upon CINCPAC's mission of protecting U.S. sea lines of communication in the Indian Ocean. Responsibility for Mongolia and Alaska also fell to CINCPAC under the new plan.
At the request of then-CINCPAC Admiral William Crowe, his title and that of his command were changed to USCINCPAC and USPACOM, respectively.
Boundary adjustment and Alaskan Command, 1989
On 26 June 1989, Secretary of Defense Dick Cheney endorsed the recommendation from the Joint Chiefs of Staff to reassign the Gulfs of Aden and Oman from USPACOM to USCENTCOM's AOR. Though a modest shift, the change meant that the new boundary between the commands would no longer cut through the Strait of Hormuz. On 1 October 1989, the defense of Alaska and all units stationed there passed to USPACOM, which subsequently raised Alaskan Command (ALCOM) as a subordinate command.
Transfers of responsibility, 2002–2006
Under UCP 2002, effective 21 January, Secretary of Defense Donald Rumsfeld assigned Antarctica to USPACOM. Secretary Rumsfeld also approved the assignment of responsibility for Russia to EUCOM with USPACOM in a supporting role for the
Siberia
Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive region, geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a ...
and Russian Far East. Later reassignments under the 2004 and 2006 plans placed the entire Seychelles Archipelago in the USCENTCOM's AOR and extended U.S. Northern Command (USNORTHCOM)'s boundary westward to encompass all of the Aleutian Islands, respectively.
On 24 October 2002, the Secretary issued a memorandum declaring that the title "Commander in Chief" should only refer to the President of the United States. Effective that date, all combatant commanders deleted "in Chief" from their titles. USCINCPAC was redesignated Commander, U.S. Pacific Command (CDRUSPACOM).
Transfer of Alaskan Command, 2014
In a move to streamline command and control of forces in Alaska and integrate forces in defense of North America, Secretary of Defense
Harry B. Harris Jr.
Harry Binkley Harris Jr. (born August 4, 1956) is a retired American diplomat and retired U.S. Navy officer. He was the first American of Japanese descent to lead US Pacific Command in the U.S. Navy and was the highest-ranking American of Japanes ...
Jim Mattis
James Norman Mattis (born September 8, 1950) is a retired United States Marine Corps four-star general who served as the 26th US secretary of defense from 2017 to 2019. During his 44 years in the Marine Corps, he commanded forces in the Persia ...
announced that Pacific Command has been renamed Indo-Pacific Command "in recognition of the increasing connectivity of the Indian and Pacific Oceans." U.S. officials stated that the change was instituted to "better reflect the command's areas of responsibility, which includes 36 nations as well as both the Pacific and Indian Oceans."
List of Commanders
While any qualified officer in the
U.S. Armed Forces
The United States Armed Forces are the military forces of the United States. The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is the ...
can be appointed as commander of INDOPACOM, only a
Navy
A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It in ...