Pacific Ocean Areas
Encyclopedia

Pacific Ocean Areas was a major Allied
Allies
In everyday English usage, allies are people, groups, or nations that have joined together in an association for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out between them...

 military command in the Pacific Ocean theater
Pacific Ocean theater of World War II
The Pacific Ocean theatre was one of four major naval theatres of war of World War II, which pitted the forces of Japan against those of the United States, the British Commonwealth, the Netherlands and France....

 of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. It was one of four major Allied commands during the Pacific War
Pacific War
The Pacific War, also sometimes called the Asia-Pacific War refers broadly to the parts of World War II that took place in the Pacific Ocean, its islands, and in East Asia, then called the Far East...

, and one of two United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 commands in the Pacific Theater of Operations
Pacific Theater of Operations
The Pacific Theater of Operations was the World War II area of military activity in the Pacific Ocean and the countries bordering it, a geographic scope that reflected the operational and administrative command structures of the American forces during that period...

. Admiral Chester W. Nimitz of the U.S. Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 headed the command throughout its existence.

The vast majority of Allied forces in the theatre were from the U.S. Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

, U.S. Army
United States Army
The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 and U.S. Marine Corps
United States Marine Corps
The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

. However units and/or personnel from New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, the United Kingdom
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

, Fiji
Fiji
Fiji , officially the Republic of Fiji , is an island nation in Melanesia in the South Pacific Ocean about northeast of New Zealand's North Island...

 and other countries also saw active service.

Formation and composition

On 24 March 1942, the newly-formed British and US Combined Chiefs of Staff
Combined Chiefs of Staff
The Combined Chiefs of Staff was the supreme military command for the western Allies during World War II. It was a body constituted from the British Chiefs of Staff Committee and the American Joint Chiefs of Staff....

 issued a directive designating the Pacific theater an area of American strategic responsibility. Six days later the US Joint Chiefs of Staff
Joint Chiefs of Staff
The Joint Chiefs of Staff is a body of senior uniformed leaders in the United States Department of Defense who advise the Secretary of Defense, the Homeland Security Council, the National Security Council and the President on military matters...

 (JCS) divided the Pacific theater into three areas: the Pacific Ocean Areas (POA), the South West Pacific Area
South West Pacific theatre of World War II
The South West Pacific Theatre, technically the South West Pacific Area, between 1942 and 1945, was one of two designated area commands and war theatres enumerated by the Combined Chiefs of Staff of World War II in the Pacific region....

 (SWPA), and the Southeast Pacific Area
Panama Sea Frontier
The Panama Sea Frontier was responsible, during World War II, for the defense of the Pacific and Atlantic sea approaches to the Panama Canal and for naval shore facilities in the Central America region...

. The Pacific Ocean Area command formally became operational on 8 May.

The JCS designated Admiral Chester W. Nimitz as Commander in Chief, Pacific Ocean Areas (CINCPOA), with operational control over all units (air, land, and sea) in that area. Mainland Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

 was excluded from the POA, as were the Philippines
Philippines
The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

, the Netherlands East Indies
Dutch East Indies
The Dutch East Indies was a Dutch colony that became modern Indonesia following World War II. It was formed from the nationalised colonies of the Dutch East India Company, which came under the administration of the Netherlands government in 1800....

, the Territory of New Guinea
New Guinea
New Guinea is the world's second largest island, after Greenland, covering a land area of 786,000 km2. Located in the southwest Pacific Ocean, it lies geographically to the east of the Malay Archipelago, with which it is sometimes included as part of a greater Indo-Australian Archipelago...

 (including the Bismarck Archipelago
Bismarck Archipelago
The Bismarck Archipelago is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea.-History:...

) and the western part of the Solomon Islands
Solomon Islands
Solomon Islands is a sovereign state in Oceania, east of Papua New Guinea, consisting of nearly one thousand islands. It covers a land mass of . The capital, Honiara, is located on the island of Guadalcanal...

. US strategic bomber forces in the theatre were under the direct control of the US Joint Chiefs of Staff. All land forces in Alaska
Alaska
Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

 and Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 remained under the control of the US Army's Western Defense Command
Western Defense Command
Western Defense Command was established on 17 March 1941 as the command formation of the U.S. Army responsible for coordinating the defense of the Pacific Coast region of the United States. A second major responsibility was the training of soldiers prior to their deployment overseas. The first...

 (see Aleutian Islands Campaign).

The Joint Chiefs further divided the Pacific Ocean Areas into the North, Central and South Pacific Areas. Nimitz designated subordinate commanders for the North and South Pacific Area
South Pacific Area
The South Pacific Area was a multinational U.S.-led military command active during World War II. It was a part of the U.S. Pacific Ocean Areas under Admiral Chester Nimitz.Instructions to the senior U.S...

s (NORPAC and SOPAC) but retained the Central Pacific Area (CENPAC), including the Hawaiian Department, under his direct command.

From 1942-1943, three Army infantry divisions (23rd/"Americal", 25th, 27th) and two Marine divisions (1st, 2nd) fought in the POA (the 1st and 3rd Marine Divisions also fought in the SWPA in 1943). From 1944-1945, five Army infantry divisions (7th, 27th, 77th, 81st, 96th) and six Marine divisions (1st, 2nd, 3rd, 4th, 5th, 6th) served in the POA (an additional 15 Army divisions fought in the SWPA during this time). U.S. Army Air Forces (USAAF) operated in the POA under the Seventh
Seventh Air Force
The Seventh Air Force is a numbered air force of the United States Air Force Pacific Air Forces . It is headquartered at Osan Air Base, Republic of Korea....

, Thirteenth
Thirteenth Air Force
The Thirteenth Air Force is a numbered air force of the United States Air Force Pacific Air Forces . It is headquartered at Hickam Air Force Base on the island of Oahu, Hawaii. 13 AF has never been stationed in the continental United States...

, and Twentieth
Twentieth Air Force
The Twentieth Air Force is a numbered air force of the United States Air Force Global Strike Command . It is headquartered at F.E. Warren Air Force Base, Wyoming.20 AF's primary mission is Intercontinental Ballistic Missile operations...

 Air Forces at various times.

In the separate South West Pacific Area, General Douglas MacArthur
Douglas MacArthur
General of the Army Douglas MacArthur was an American general and field marshal of the Philippine Army. He was a Chief of Staff of the United States Army during the 1930s and played a prominent role in the Pacific theater during World War II. He received the Medal of Honor for his service in the...

 assumed command. The effective result of this organizational scheme was the creation of two separate commands in the Pacific: POA and SWPA, each reporting separately to the Joint Chiefs, each competing for scarce resources in an economy-of-force theater, and each headed by a commander in chief (CINC) from a different service. In particular, the division of the Solomons caused problems, since the battles of the Solomon Islands campaign
Solomon Islands campaign
The Solomon Islands campaign was a major campaign of the Pacific War of World War II. The campaign began with Japanese landings and occupation of several areas in the British Solomon Islands and Bougainville, in the Territory of New Guinea, during the first six months of 1942...

 in 1942–1943 ranged over the whole region, with the main Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese bases in SWPA and the main Allied bases in SOPAC.

Commanders, South Pacific Area

  • Vice Admiral Robert L. Ghormley
    Robert L. Ghormley
    Vice Admiral Robert Lee Ghormley was an admiral in the United States Navy, serving as Commander, South Pacific Area, during the Second World War.-Biography:...

     (19 June–18 October 1942)
  • Vice Adm./Adm. William Halsey, Jr.
    William Halsey, Jr.
    Fleet Admiral William Frederick Halsey, Jr., United States Navy, , was a U.S. Naval officer. He commanded the South Pacific Area during the early stages of the Pacific War against Japan...

     (18 October 1942–15 June 1944)
  • Vice Adm. John H. Newton (15 June 1944–13 March 1945)
  • Vice Admiral William L. Calhoun (13 March–2 September 1945)

Commanders, North Pacific Area

  • Rear Adm. Robert A. Theobald
    Robert Alfred Theobald
    Robert Alfred Theobald , nicknamed "Fuzzy", was a United States rear admiral who served in World War I and World War II, and was the author of the 1954 book The Final Secret of Pearl Harbor: The Washington Background of the Pearl Harbor Attack.-Biography:Born in San Francisco, California, Theobald...

     (17 May 1942–4 January 1943)
  • Rear Adm. Thomas C. Kinkaid
    Thomas C. Kinkaid
    Thomas Cassin Kinkaid was an admiral in the United States Navy during World War II. He built a reputation as a "fighting admiral" in the aircraft carrier battles of 1942 and commanded the Allied forces in the Aleutian Islands Campaign...

     (4 January–11 October 1943)
  • Vice Adm. Frank J. Fletcher
    Frank Jack Fletcher
    Frank Jack Fletcher was an admiral in the United States Navy during World War II. Fletcher was the operational commander at the pivotal Battles of Coral Sea and of Midway. He was the nephew of Admiral Frank Friday Fletcher.-Early life and early Navy career:Fletcher was born in Marshalltown, Iowa...

    (11 October 1943–2 September 1945)
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