1st Mission Support Command

1st Mission Support Command
Shoulder sleeve insignia
Country	United States of America
Branch	United States Army
Type	Support Command
Role	Sustainment
Part of	US Army Reserve
Garrison/HQ	Fort Buchanan, Puerto Rico
Motto(s)	"Garita Warriors! Always First!"
Commanders
Commanding General	Brig. Gen. Carlos E. Gorbea
Command Sergeant Major	CSM Lorraine C. Smith

1st Mission Support Command is a United States Army Reserve command providing support to military units based in Puerto Rico and the US Virgin Islands. Headquartered at Fort Buchanan within the metropolitan area of the Puerto Rico's capital San Juan the command consists of 54 units and fields 4,200 soldiers.^[1]

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.

The 1st MSC carries the lineage of the many units that have worn the Garita Patch in the past.^[2] The Puerto Rican Department first wore it in 1942. It was redesignated for the Antilles Department in 1944 and in 1948, the unit was redesignated U.S. Army Forces, Antilles.

In 1973, the Support Group was placed directly under First United States Army. 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 insignia was reassigned to the 7581st USAR Garrison in 1981 and redesignated to the U.S. Army Reserve Forces Puerto Rico in 1990. The lineage continued through the 65th U.S. Army Reserve Command in 1992, and again to the 65th Regional Support Command in 1998. The 65th RSC became the 65th Regional Readiness Command in 2003. The lineage passed to the 166th Support Group in 2007, and finally the 1st Support Command on 7 February 2008. ^[3]

As of 2017 the following units are subordinated to the 1st Mission Support Command:^[4]

• 1st Mission Support Command, at Fort Buchanan, Puerto Rico
  • 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
    • 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^[3]
    • 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