377th Theater Sustainment Command

The 12th Port of Embarkation, later designated 377th Theater Sustainment Command, was constituted on 2 July 1942 and was activated 5 July 1942 at Fort Dix, New Jersey. The unit was converted, reorganized, and redesignated 7 November 1942 as the 12th Port. The unit was inactivated 4 January 1946 at Camp Kilmer, New Jersey and later redesignated 3 November 1948 in New Orleans, Louisiana, as the 377th Transportation Major Port. On 11 September 1950 the 377th was called to Camp Kilmer, New Jersey. Later, the unit moved to Fort Eustis, Virginia and stayed on active Federal Service until 10 October 1952. From 1953 until 1963, the 377th remained in a Reserve status and experienced several changes in unit designation.

On 31 December 1965, the unit was re-designated as the 377th Support Brigade under the Army Logistical Concept. On 16 October 1979, it was renamed the 377th Corps Support Command. It retained the designation until 16 July 1981 when it was designated as a Theater Army Area Command (TAACOM). On 1 October 1998 the TAACOM wartime mission expanded and the unit designation was changed to the 377th Theater Support Command.

The TSC serves as a Force Support Package unit with an ongoing support mission in its area of operation. Over 500 downtrace units throughout the United States, Puerto Rico, Guam and the Virgin Islands provide support to the TSC for training and wartime mission guidance. Whether at home station, deployed across the country or overseas, the TSC trains to achieve its peacetime and wartime mission of providing command and control of assigned units to ensure and maintain a high state of readiness. The TSC prepares wartime-aligned units to accomplish their mission by developing, executing and evaluating training. The TSC provides daily logistics support to its wartime higher headquarters for missions and exercises.^[1]

As of 2025 the following units are subordinated to the 377th Theater Sustainment Command:^[2]

• 377th Theater Sustainment Command, in Belle Chasse (LA)^[3]
  • Headquarters and Headquarters Company, in Belle Chasse (LA)
  • 54th Quartermaster Detachment (TM B), in New Orleans (LA)
  • 101st Quartermaster Detachment (TM B), in New Orleans (LA)
  • 102nd Quartermaster Detachment (TM B), in New Orleans (LA)
  • 377th Detachment (MSE), in New Orleans (LA)
  • 469th Financial Management Support Center, in New Orleans (LA)
  • 419th Contracting Support Brigade — Army Reserve Elements, at Fort Bragg (NC)
  • 4th Expeditionary Sustainment Command, at Joint Base San Antonio (TX)^[4]
    • 77th Quartermaster Group (Petroleum), in El Paso (TX)
    • 90th Sustainment Brigade, in North Little Rock (AR)
    • 211th Regional Support Group, in Corpus Christi (TX)
    • 300th Sustainment Brigade, in Grand Prairie (TX)
  • 143rd Expeditionary Sustainment Command, in Orlando (FL)^[5]
    • 207th Regional Support Group, at Fort Jackson (SC)
    • 518th Sustainment Brigade, in Knightdale (NC)
    • 641st Regional Support Group, in St. Petersburg (FL)
    • 642nd Regional Support Group, in Decatur (GA)
  • 310th Expeditionary Sustainment Command, in Indianapolis (IN)^[6]
    • 38th Regional Support Group, in Cross Lanes (WV)
    • 55th Sustainment Brigade, at Fort Belvoir (VA)
    • 354th Quartermaster Group, in Whitehall (OH)
    • 643rd Regional Support Group, in Whitehall (OH)
  • 316th Expeditionary Sustainment Command, in Coraopolis (PA)^[7]
    • 3rd Transportation Brigade (Expeditionary), at Fort Belvoir (VA)
    • 77th Sustainment Brigade, at Joint Base McGuire-Dix-Lakehurst (NJ)
    • 301st Regional Support Group, in Butler (PA)
    • 475th Quartermaster Group, in Farrell (PA)
    • 655th Regional Support Group, in Chicopee (MA)
  • Army Reserve Sustainment Command, in Birmingham (AL)^[8]
    • Army Materiel Command — Army Reserve Elements (AMC-ARE), in Huntsville (AL)
    • Army Sustainment Command — Army Reserve Elements (ASC-ARE), in Rock Island (IL)
    • Defense Contract Management Agency — Army Reserve Elements (DCMA-ARE), at Fort Lee (VA)
    • Logistics Civil Augmentation Program (LOGCAP), in Rock Island (IL)
      • Logistics Support Brigade, in Rock Island (IL)
  • Deployment Support Command (US Army Reserve), in Birmingham (AL)^[9]
    • 1179th Transportation Brigade, at Fort Hamilton (NY)
      • 1174th Deployment and Distribution Support Battalion, at Fort Totten (NY)
      • 1185th Deployment and Distribution Support Battalion, in Lancaster (PA)
      • 1398th Deployment and Distribution Support Battalion, in Baltimore (MD)
    • 1189th Transportation Brigade, in North Charleston (SC)
      • 1173rd Deployment and Distribution Support Battalion, in Brockton (MA)
      • 1182nd Deployment and Distribution Support Battalion, in North Charleston (SC)
      • 1186th Deployment and Distribution Support Battalion, in Jacksonville (FL)
      • 1188th Deployment and Distribution Support Battalion, in Decatur (GA)
    • 1190th Transportation Brigade, in Baton Rouge (LA)
      • 1181st Deployment and Distribution Support Battalion, in Meridian (MS)
      • 1184th Deployment and Distribution Support Battalion, in Mobile (AL)
      • 1192nd Deployment and Distribution Support Battalion, in New Orleans (LA)
    • 1394th Transportation Brigade, at Camp Pendleton, California
      • 1395th Deployment and Distribution Support Battalion, in Joint Base Lewis–McChord (WA)
      • 1397th Deployment and Distribution Support Battalion, in Vallejo (CA)
    • 757th Transportation Battalion (Railway), in Milwaukee (WI)

 This article incorporates public domain material from 377th Theater Sustainment Command Honors. United States Army Center of Military History.

 This article incorporates public domain material from websites or documents of the United States Army.