US Army, Pacific (USARPAC) traces its history back to 1898, when the United States first became a Pacific power and American soldiers first arrived in Hawaii.  Hawaii soon became a power-projection platform for military operations in the Asia-Pacific region.  Fort Shafter was built in 1905-07 and in 1921 became the headquarters for the Hawaiian Department.

When Army and Navy forces in Hawaii and the Philippines came under attack on December 7, 1941, Hawaii quickly became a strategic hub.  The Hawaiian Department became the Army component command under the Commander-in-Chief, Pacific Ocean Areas.  As the campaigns progressed, the command was designated US Army Forces, Central Pacific Area (1943-44); US Army Forces, Pacific Ocean Areas (1944-45); and US Army Forces, Middle Pacific (1945-47).  Its insignia, designed in 1944, depicted the axis of advance across the Central Pacific.

In 1947 the command was redesignated US Army, Pacific.  During the Korean War USARPAC provided combat forces, training, and logistical support.  In 1957 the Joint Chiefs of Staff eliminated the Far East Command in favor of a single US Pacific Command, and USARPAC took control of all Army forces in the region.

During the Vietnam War USARPAC provided combat forces, training, and logistical support for US Army, Vietnam.  After the war, the Army reduced its presence in the region and reorganized.  In 1974 USARPAC was eliminated as a component command and Army forces in Korea and Japan became separate major commands.  In Hawaii, USARPAC headquarters was superceded by US Army Support Command Hawaii (USASCH) and a Department of the Army field operating agency, US Army CINCPAC Support Group.

In 1979 the Army established US Army Western Command (WESTCOM) as a major command and the Army component of US Pacific Command.  WESTCOM took command of Army forces in Hawaii.  In 1989 it added US Army Alaska and in 1990 US Army Japan.  Also in 1990 WESTCOM was renamed USARPAC.

Since the end of the Cold War, USARPAC has remained engaged throughout the Asia-Pacific region, providing trained and ready, Active and Reserve Component combat and enabling forces, and playing a key role in US Pacific Command's theater security cooperation program.  It has sent peacekeeping forces to the Sinai Peninsula, Haîti, East Timor, and Bosnia.  The 196th Infantry Brigade provides training support to National Guard and Army Reserve forces in Alaska, Hawaii, Guam, and American Samoa, as well as humanitarian assistance, disaster relief, and military support to civil authorities.  The 9th Regional Support Command commands Army Reserve forces through the region.  In October 2000 the headquarters reorganized as a multi-component Army service component command.

Since September 11, 2001, USARPAC soldiers have played a vital role in homeland defense for Hawaii, Alaska, Guam, and Japan, as well as in support of operations with our allies elsewhere in the region.  In years to come, USARPAC will remain vital to our national security strategy in this dynamic region.


USARPAC postures and prepares the force for unified land operations, responds to threats, sustains and protects the force, and builds military relationships that develop partner defense capacity in order to contribute to a stable and secure U.S. Pacific Command area of responsibility.


General Robert B. Brown Commanding General

Robert B. Brown

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