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9th Mission Support Command

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Garrison/HQ  Fort Shafter, Hawaii
9th Mission Support Command
Active  1 Jun 1940 – Mar 1950 10 Aug 1950 - Present
Country  United States of America
Allegiance  United States of America
Branch  United States Army Reserves
Type  Engineer, Infantry, Support, Civil Affair

9th Mission Support Command (9th MSC) is a United States Army Reserve unit located in Fort Shafter, Honolulu, Hawai'i.


The 9th Mission Support Command is a U.S. Army Reserve Command under the operational control of U.S. Army Pacific. Headquartered in Honolulu, Hawaii, the command consists of approximately 3,500 Army Reserve Soldiers and 160 civilians throughout the Pacific, including Hawaii, Alaska, American Samoa, Japan, Korea, Guam and Saipan.

The 9th MSC is engaged throughout the Asia-Pacific realm, providing trained and ready forces to overseas contingency operations, playing a vital role in approximately 20 U.S. Army Pacific Theater Security Cooperation Program exercises, and providing key battle staff in support of Joint Task Force Homeland Defense.


The 9th Mission Support Command (9th MSC) was originally designated IX Corps (Augmentation) and was organized on 16 January 1962. At that time it was an integral part of the active Army’s IX Corps.

The original IX Corps traces its lineage back to the Civil War. It was formed as part of the Army of the Potomac under the command of Maj. Gen. Ambrose Burnside. The Corps fought at Antietam and Fredericksburg in 1862, and later in the Western Campaign at Vicksburg and Chattanooga. Transferred back to the East, the Corps served in the Wilderness, Spotsylvania, and Cold Harbor. IX Corps was deactivated in 1865.

In 1940 it was activated at Fort Lewis, Washington, and assigned there until September 1942. It was deployed to Leyte, Philippine Islands in 1944. After World War II it was assigned to the Eighth U.S. Army for occupation duty in Japan.

IX Corps was inactivated in March, 1950, but was reactivated in August that same year at Fort Sheridan, Illinois. It was sent to Korea, where it participated in the successful expulsion of communist forces from South Korea. For its outstanding service, the unit was awarded two Republic of Korea Presidential Unit Citations and nine campaign honors. In 1954, the unit was ordered back to Japan. In 1956, it redeployed to Okinawa to become part of HQ, Ryukyu Islands. In 1961, IX Corps became a major subordinate command of U.S. Army, Pacific.

On 27 April 1987, the command was redesignated IX Corps (Reinforcement). On 1 October 1995, the command was renamed 9th U.S. Army Reserve Command following the inactivation of IX Corps, a month earlier at Camp Zama, Japan.

The command moved into its current location on Fort Shafter Flats from Fort DeRussy in December, 1997.

The organization experienced several years of reorganization and restructure to establish a more relevant, ready, and indispensable Pacific Army Reserve force. As a result, the command was redesignated the 9th Regional Support Command on 31 January 1998. The 9th Regional Support Command was redesignated to the 9th Regional Readiness Command on 4 November 2002, and subsequently again redesignated to its current organization as the 9th Mission Support Command on 16 April 2008.

Subordinate Units

Some of our major subordinate commands include:

  • Theater Support Group
  • 100th Battalion, 442nd Infantry Regiment
  • 322nd Civil Affairs Brigade
  • 303rd Maneuver Enhancement Brigade
  • 411th Engineer Battalion
  • 658th Regional Support Group
  • 1984th United States Army Hospital
  • 4960th Multi Functional Training Brigade
  • References

    9th Mission Support Command Wikipedia

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