1st Mission Support Command is a

United States Army Reserve The United States Army Reserve (USAR) is a Military reserve force, reserve force of the United States Army. Together, the Army Reserve and the Army National Guard constitute the Army element of the reserve components of the United States Armed ...

command providing support to military units based in

Puerto Rico ; abbreviated PR), officially the Commonwealth of Puerto Rico, is a Government of Puerto Rico, self-governing Caribbean Geography of Puerto Rico, archipelago and island organized as an Territories of the United States, unincorporated territo ...

and the

US Virgin Islands The United States Virgin Islands, officially the Virgin Islands of the United States, are a group of Caribbean islands and a Territories of the United States, territory of the United States. The islands are geographically part of the Virgin Isl ...

. Headquartered at Fort Buchanan within the metropolitan area of the Puerto Rico's capital

San Juan San Juan, Spanish for Saint John (disambiguation), Saint John, most commonly refers to: * San Juan, Puerto Rico * San Juan, Argentina * San Juan, Metro Manila, a highly urbanized city in the Philippines San Juan may also refer to: Places Arge ...

the command consists of 54 units and fields 4,200 soldiers.

History

Reserve units have served in Puerto Rico since 1922 when the 373rd Infantry was moved to the Organized Reserve and headquartered in

San Juan, Puerto Rico San Juan ( , ; Spanish for "Saint John the Baptist, John") is the capital city and most populous Municipalities of Puerto Rico, municipality in the Commonwealth (U.S. insular area), Commonwealth of Puerto Rico, an unincorporated territory of the ...

. In 1973, the Support Group was placed directly under

First United States Army First Army is the largest OC/T organization in the U.S. Army, comprising two divisions, ten brigades, and more than 7,500 Soldiers. Its mission is to partner with the U.S. Army National Guard and U.S. Army Reserve to enable leaders and deli ...

. By 1974, the 166th Support Group was given full mission control of all United States Army Reserve units in Puerto Rico and the United States Virgin Islands and assumed the mission and functions of a major U.S. Army Reserve Command, under First U.S. Army. The Garita patch is worn by members assigned to this unit.

Subordinate units

1st Mission Support Command - Organization 2024

As of 2017 the following units are subordinated to the 1st Mission Support Command: * 1st Mission Support Command, at Fort Buchanan,

** 166th Regional Support Group, at Fort Buchanan, Puerto Rico *** 346th Transportation Battalion, at Ceiba, Puerto Rico *** 393rd Combat Sustainment Support Battalion, at Fort Buchanan, Puerto Rico ** 210th Regional Support Group, in

Aguadilla, Puerto Rico Aguadilla (, ), founded in 1775 by Luis de Córdova, is a Aguadilla barrio-pueblo, city and Municipalities of Puerto Rico, municipality located in the northwestern tip of Puerto Rico, bordered by the Atlantic Ocean to the north and west, north of ...

*** 35th Signal Battalion, at Fort Allen *** 77th Combat Sustainment Support Battalion, in Aguadilla, Puerto Rico *** 448th Engineer Battalion, at Fort Buchanan, Puerto Rico ** Caribbean Readiness Group, at Fort Buchanan *** 1st Battalion, 333rd Regiment (Multifunctional Training Battalion), at Fort Buchanan, Puerto Rico *** 1st Battalion, 389th Regiment, at Fort Buchanan, Puerto Rico *** 2nd Battalion, 348 Regiment, at Fort Buchanan, Puerto Rico *** 49th Multifunctional Medical Battalion, at San Juan, Puerto Rico *** 402nd Civil Affairs Battalion, at Fort Buchanan, Puerto Rico

References

{{reflist Support Commands of the United States Army Military units and formations of the United States Army Reserve Military units and formations in Puerto Rico