Army Organization
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Source: United States Army Home Page
* The United States Army was also once organized into regiments, but presently uses the brigade instead. There are exceptions, such as the United States Cavalry, some parachute infantry regiments and the Army Rangers. Although every battalion or squadron is associated with a regiment for historical purposes, most combat regiments are cavalry regiments which are attached to a corps. These regiments, who are associated generally for historical purposes, can be known as parent regiments.
A brigade is smaller than a division and roughly equal to or a little larger than a regiment. Strength typically ranges from 1,500 to 3,500 personnel. Army brigades formerly contained two or more regiments, but this structure is now considered obsolete.
A regiment is larger than a company and smaller than a division. Depending on mission and makeup, a modern regiment is similar to a brigade in size in that both range from a few hundred soldiers up to 2,000-3,000, depending on branch of service and method of organization. The modern unit varies in size, scope, administrative role from nation to nation, and within the armed forces of some nations.
In the 20th century the "Division" became the tactical and administrative building block for U.S. armies in mobilizations for World Wars I & II, Korea, Vietnam and NATO. Training, administration and even tactical employment was centered at divisional level. Most combat support and logistics was also concentrated at that level.
In the 21st century, the U.S. Army has moved to "modularization", trying to use the autonomous brigade as the basic building block, as well as insert more stability and unit cohesion.
The United States Marine Corps calls its divisional brigades, regiments, for traditional reasons.
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Anti-Aircraft Groups
69th Anti-Aircraft Artillery Group
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Redesignated 10 Sep 43 from 69th Coastal Artillery Regiment at San Diego, CA and moved to Ft. Bliss, TX 6 Mar 44; arrived at Camp Polk, LA 12 Jun 44 and departed Seattle Port of Embarkation 13 Jan 45; arrived in Honolulu, Hawaii 20 Jan 45 and sent to Saipan where arrived 12 Feb 45 and relieved the 24th Infantry Regiment in mopping up Japanese forces there 28 Jun - 1 Aug 45; inactivated on Saipan 5 Jun 46.
Campaigns: Western Pacific
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86th Anti-Aircraft Artillery Group
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Activated at Ft. Kamehameha, Hawaii and departed 7 Jun 44; landed on Saipan 27 Jun 44 and inactivated there 15 Jan 46.
Campaigns: Western Pacific
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87th Anti-Aircraft Artillery Group
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Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Activated in Ledo, India 22 Jun 44 and disbanded in Burma 8 Jul 45.
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Anti-Aircraft Brigades
59th Anti-Aircraft Artillery Brigade
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Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Activated 10 May 43 at Camp Haan, CA as the 59th Coastal Artillery Brigade (AA) where redesignated AAA Brigade 28 May 43; moved to Hamilton Field, CA 2 Dec 43 and returned to Camp Haan, CA 19 Apr 44; transferred to Camp Beauregard, LA 11 Aug 44 and Ft. Bliss, TX 15 Nov 44; staged at Ft. Lawton,WA 6 Jan 45 until departed Seattle Port of Embarkation 13 Jan 45; arrived in Hawaii 20 Jan 45 and departed 29 Jan 45; landed on Saipan 12 Feb 45 where inactivated 15 Jan 46.
Campaigns: Western Pacific
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Anti-Aircraft Battalions
16th Airborne Anti-Aircraft Battalion
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Constituted 25 August 1943 in the Army of the United States as Headquarters and Headquarters Detachment, 16th Airborne Antiaircraft Battalion and assigned to the US Army Forces in the China-Burma-India Theater. Activated 22 June 1944 at Shingbwiyang, Burma. Disbanded 9 July 1945 at Myitkyina, North Burma.
Campaigns: World War II: Central Burma, India-Burma
Decorations: None
- 663d AAA Machine Gun Battery (Airborne)
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17th Airborne Anti-Aircraft Battalion
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Constituted 1 June 1944 in the Army of the United States as Headquarters and Headquarters Detachment, 17th Airborne Antiaircraft Battalion and assigned to the US Army Forces in the China-Burma-India Theater. Activated 22 June 1944 at Moran Airfield, India. Disbanded 10 July 1945 at Dinjan, India.
Campaigns: World War II: Central Burma
Decorations: None
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18th Airborne Anti-Aircraft Battalion
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: Constituted 1 June 1944 in the Army of the United States as Headquarters and Headquarters Detachment, 18th Airborne Antiaircraft Battalion and assigned to the US Army Forces in the China-Burma-India Theater. Activated 22 June 1944 at Kurmitola, India. Arrived in Burma 16 January 1945 and returned to India, 29 June 1945. Disbanded 9 July 1945 at Camp Kanchapara, India.
Campaigns: World War II: Central Burma
Decorations: None
- 644th AAA Machine Gun Battery (Airborne)
- 687th AAA Machine Gun Battery (Airborne)
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64th Anti-Aircraft Artillery Gun Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 12 Dec 43, Ft. Shafter, Hawaii (1st BN, 64th CA)
Inactivated: 20 May 46, Guam.
Locations: Hawaii 1943; Guam 10 Sep 44; Guam Aug 45.
Campaigns: Western Pacific
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206th Anti-Aircraft Artillery Auto-Weapons Battalion
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 20 Jan 43 Ft. Bliss, TX as Sep CA Bn AA-AW (2nd Bn, 610th CA); Redesignated from Coastal Artillery 20 Apr 43
Inactivated: 15 Jan 46 Iwo Jima
Locations: Ft. Bliss, TX 20 Jan 43; San Francisco Port of Embarkation 16 Dec 43; Hawaii 21 Dec 43; Saipan 25 Jul 44; Iwo Jima (Batteries C, D) 14 Aug 45
Campaigns: Air Offensive Japan, Western Pacific
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234th Anti-Aircraft Artillery Gun Battalion (Colored)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 20 Jan 43 Camp Stewart, GA as CA Searchlight Bn (3d Bn, 612th CA); Redesignated from CA Searchlight BN to AAA Gun Bn 1 Aug 43
Inactivated: 15 Jun 46 Saipan
Locations: Camp Stewart, GA 20 Jan 43; Los Angeles Port of Embarkation 19 Dec 44; India 23 Jan 45; Saipan 9 Jun 45
Campaigns: Western Pacific (13-16 Jul 45)
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464th Anti-Aircraft Artillery Auto-Weapons Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 15 Oct 42 Camp Davis, NC as Sep CA Bn AA-AW (Redesignated from Coastal Artillery 28 Apr 44)
Inactivated: 10 Jul 45 Calcutta, India
Locations: Camp Davis, NC 15 Oct 42; New York Port of Embarkation 9 May 43; Brazil 25 May 43; Madagascar I 13 Jun 43; Ceylon 18 Jun 43; India 23 Jun 43; Burma 12 Jan 45; India 18 Apr 45
Campaigns: India-Burma, Central Burma, China Defensive
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484th Anti-Aircraft Artillery Auto-Weapons Battalion (Colored) (Semimobile)
Source:
Formed: 10 Dec 42 Camp Stewart, GA as Sep CA Bn AA-AW; Redesignated from Coastal Artillery 30 Apr 43
Inactivated: 6 Jan 46 Camp Kilmer, NJ
Locations: Camp Stewart, GA 10 Dec 42; San Francisco Port of Embarkation 21 Jul 43; India 5 Sep 43 (Chabua, Dinjan, Sookerating); Burma 22 Nov 44 (Lashio, Bhamo); Myitkyina North, Burma Aug 45; New York Port of Embarkation 5 Jan 46
Campaigns: India-Burma, Central Burma
Battery "A" - Namponmao
Battery "B" - Bhamo
Battery "C" - Myitkyina South
Battery "D" - Lashio
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501st Anti-Aircraft Artillery Gun Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 20 Feb 43 Camp Edwards, MA as Sep CA Bn AA-Gun; Redesignated from Coastal Artillery 7 Jun 43
Inactivated: 25 Feb 46 Saipan
Locations: Camp Edwards, MA 20 Feb 43; San Francisco Port of Embarkation 16 Dec 43; Hawaii 21 Dec 43; Saipan 27 Jun 44
Campaigns: Western Pacific
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738th Anti-Aircraft Artillery Gun Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 20 Feb 43 Camp Edwards, MA as Sep CA Bn AA-Gun (1st Bn, 609th CA); Redesignated from Coastal Artillery 7 Jun 43
Inactivated: 25 Feb 46 Saipan
Locations: Camp Edwards, MA 20 Feb 43; San Francisco Port of Embarkation 6 Jan 44; Hawaii 15 Jan 44; Saipan 1 Sep 44
Campaigns: Western Pacific
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752nd Anti-Aircraft Artillery Gun Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 12 Dec 43 Hawaii (2nd Bn, 95th CA)
Inactivated: (Active through 1946)
Locations: Hawaii 12 Dec 43; Saipan 6 Feb 45; Iwo Jima 11 Apr 45
Campaigns: Air Offensive Japan, Western Pacific
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843d Anti-Aircraft Artillery Auto-Weapons Battalion (Air Transportable) (See CBI Unit Histories)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 20 May 43 Camp Stewart, GA
Inactivated: 7 Nov 45 Camp Kilmer, NJ
Locations: Camp Stewart, GA 20 May 43; Los Angeles Port of Embarkation 29 Jun 44; India 7 Aug 44; Myitkyina, Burma 10 Oct 44 (less Battery B at Mogaung, Burma); Chengtu, China 16 Dec 44; India 28 Sep 45
Campaigns: Air Offensive Japan, Western Pacific
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864th Anti-Aircraft Artillery Auto-Weapons Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 12 Dec 43 Hawaii (3d Bn, 64th CA)
Inactivated: (Active through 1946)
Locations: Hawaii 12 Dec 43; Saipan Aug 45
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865th Anti-Aircraft Artillery Auto-Weapons Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 12 Dec 43 Hawaii (3d Bn, 93d CA)
Inactivated: (Active through 1946)
Locations: Hawaii 12 Dec 43; Saipan Aug 45
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868th Anti-Aircraft Artillery Auto-Weapons Battalion (Semimobile)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 12 Dec 43 Hawaii (3d Bn, 97th CA)
Inactivated: 15 Jan 46 Guam
Locations: Hawaii 12 Dec 43; Guam 10 Sep 44
Campaigns: Western Pacific
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Anti-Aircraft Batteries
644th AAA Machine Gun Battery (Airborne) (18th AAA BN)
645th AAA Machine Gun Battery (Airborne)
683d AAA Machine Gun Battery (Airborne) (16th AAA BN)
685th AAA Machine Gun Battery (Airborne)
666th AAA Machine Gun Battery (Airborne) - Piardoba by 1 Aug 45
667th AAA Machine Gun Battery (Airborne) - Piardoba by 1 Aug 45
668th AAA Machine Gun Battery (Airborne)
669th AAA Machine Gun Battery (Airborne)
682nd AAA Machine Gun Battery (Airborne)
683d AAA Machine Gun Battery (Airborne)
684th AAA Machine Gun Battery (Airborne) (See CBI Unit Histories)
685th AAA Machine Gun Battery (Airborne)
686th AAA Machine Gun Battery (Airborne)
687th AAA Machine Gun Battery (Airborne) (18th AAA BN)
701st AAA Machine Gun Battery (Airborne)
702nd AAA Machine Gun Battery (Airborne)
703d AAA Machine Gun Battery (Airborne) - Paoshan, China (Attached to Y-Force)
704th AAA Machine Gun Battery (Airborne) - Wayao, China (Attached to Y-Force)
705th AAA Machine Gun Battery (Airborne) (See CBI Unit Histories)
706th AAA Machine Gun Battery (Airborne)
Coastal Artillery Units
33d Coastal Artillery Battalion (155 mm Gun)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 18 Feb 44 Waimea, Hawaii
Inactivated: 13 Dec 45, Saipan
Locations: Hawaii 18 Feb 44; Saipan 26 Aug 44; Saipan Aug 45
Campaigns: Western Pacific
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177th Coastal Artillery Battalion (155 mm Gun)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 31 May 44 Ft Ruger, Hawaii (3d BN, 57th CA)
Inactivated: 15 Jan 46 Guam
Locations: Hawaii 31 May 44; Guam 23 Nov 44; Guam Aug 45
Campaigns: Eastern Mandates, Western Pacific
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178th Coastal Artillery Battalion (155 mm Gun)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 31 May 44 Ft Ruger, Hawaii (When formed, Battery A, 55th CA and Battery B, 57th CA were on Kwajalein. Arrived Hawaii 17 Aug 44)
Inactivated: 7 Feb 46 Guam
Locations: Hawaii 31 May 44; Guam 4 Nov 44; Guam Aug 45
Campaigns: Eastern Mandates, Western Pacific
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180th Coastal Artillery Battalion (155 mm Gun)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 31 May 44 Honolulu, Hawaii
Inactivated: 13 Dec 45 Tinian
Locations: Hawaii 31 May 44; Tinian 19 Oct 44; Tinian Aug 45
Campaigns: Western Pacific
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1st Tank Group, Provisional (Chinese-American) (See CBI Unit Histories)
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 2nd Maintenance Co. |
(Courtesy of Mr. David Kaufman; used with permission)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: 1 Oct 43 activated at Ramgarh, India and arrived Ledo 1 Jan 44; entered Burma 20 Jan 44 and supported Chinese 22nd Div and Galahad Force commencing 3 Mar 44 in combat; in China Mar 45. Aug 45 Location: Sookerating, India
Campaigns: India-Burma, Central Burma
Other Sites of Interest:
1st Provisional Tank Group - CBI Theater of World War II
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1st Tank Battalion, Provisional (Chinese-American)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 1 Oct 43, Ramgarh, India
Inactivated: Phased into Kuomintang Army by end of war
Locations: Ramgarh, India: 1 Oct 43; Burma 20 Jan 44; Sookerating, India Aug 45
Campaigns: India-Burma, Central Burma
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2nd Tank Battalion, Provisional (Chinese-American)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 1 Oct 43, Ramgarh, India
Inactivated: Phased into Kuomintang Army by end of war
Locations: Ramgarh, India: 1 Oct 43; Burma 20 Jan 44; Sookerating, India Aug 45
Campaigns: India-Burma, Central Burma
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3d Tank Battalion, Provisional (Chinese-American)
(Courtesy of Mr. David Kaufman; used with permission)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 1 Oct 43, Ramgarh, India
Inactivated: Phased into Kuomintang Army by end of war
Locations: Ramgarh, India: 1 Oct 43; Burma 20 Jan 44; Sookerating, India Aug 45
Campaigns: India-Burma, Central Burma
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4th Tank Battalion, Provisional (Chinese-American)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 1 Oct 43, Ramgarh, India
Inactivated: Phased into Kuomintang Army by end of war
Locations: Ramgarh, India: 1 Oct 43; Burma 20 Jan 44; Sookerating, India Aug 45
Campaigns: India-Burma, Central Burma
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5th Tank Battalion, Provisional (Chinese-American)
(Courtesy of Mr. David Kaufman; used with permission)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 1 Oct 43, Ramgarh, India
Inactivated: Phased into Kuomintang Army by end of war
Locations: Ramgarh, India: 1 Oct 43; Burma 20 Jan 44; Sookerating, India Aug 45
Campaigns: India-Burma, Central Burma
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6th Tank Battalion, Provisional (Chinese-American)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Formed: 1 Oct 43, Ramgarh, India
Inactivated: Phased into Kuomintang Army by end of war
Locations: Ramgarh, India: 1 Oct 43; Burma 20 Jan 44; Sookerating, India Aug 45
Campaigns: India-Burma, Central Burma
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527th Ordnance Company (Heavy Maintenance) (Tank) (Chinese-American)
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Source: 1st Provisional Tank Group - CBI Theater of World War II
"...the American contingent derived most of its personnel from a regular U.S. Army unit, the 527th Ordnance Company (Heavy Maintenance) (Tank). Brown (U.S. Army Col. Rothwell H. Brown, Commander, 1st PTG) wanted a unit like the 527th because of the tactical need and its unusual ability to all perform all maintenance in the field. Back in the U.S. the 527th had been raised from North Carolina state highway road crews, and trained with the III Armored Corps. During most of its tour in the CBI, the 527th Ordnance was commanded by Capt. Tom A. Miller, who was replaced on June 22, 1945 by Capt. John W. Hutchinson. The 527th had reached the CBI by a lengthy route via Oran, North Africa and Calcutta, India."
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5307th Composite Unit, Provisional (See CBI Unit Histories)
Source: "World War II Order of Battle", Shelby L. Stanton, 1984
Lineage: 10 Oct 43 organized at Deogarh, India as the 5307th Composite Regiment, Provisional, and activated 1 Jan 44 under U.S. Army Forces in China-Burma-India; 2 Jan 44 redesignated as the 5307th Composite Unit, Provisional, also known as GALAHAD Force and Merrill's Marauders; organized into three long-range penetration battalions and entered Hukawing Valley Burma on 12 Feb 44; assigned to the Northern Combat Area Command on 8 May 44 and operated behind Japanese front lines, capturing Myitkyina Airfield along the Irrawaddy river 17 May 44; 3d Bn defeated at Charpate 24 May 44 and 2nd Bn driven from Namkwi 26 May 44; battled at Myitkyina until captured city 3 Aug 44 where disbanded on 10 Aug 44 and assets transferred to 475th Infantry Regiment.
Campaigns: India-Burma
Decorations: Distinguished Unit Citation, 3 Mar-17 May 44, WD GO 54-44.
(Presidential Unit Citation: See "Background of the Presidential Unit Citation for MIS" in CBI Unit Histories)
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Source:
MEDICAL DEPARTMENT, UNITED STATES ARMY WOUND BALLISTICS
Chapter IV - Casualty Survey - New Georgia and Burma Campaigns
Organization of 5307th Composite Unit (Provisional)
In September 1943, 650 men and officers, all volunteers, congregated in New Caledonia to form a special infantry battalion. They had been selected from the 37th, 43d, 25th, and Americal Divisions. Later, 250 additional men and officers arrived, from the 32d and 41st Divisions and from the 98th Pack Artillery, from Australia. Most of these men had been overseas for more than a year and had seen action in the South Pacific or Southwest Pacific Areas.
These men made up the 3d Battalion of what was to become the 5307th Composite Unit (Provisional). They traveled to India on a transport with a battalion from the United States, which was to become the 1st Battalion of this Unit, and a battalion from the Caribbean area which was to become the 2d Battalion.
These three battalions, organized as an infantry regiment, trained in India from November 1943 to January 1944. During this time, there were many transfers of men within the battalions, and about 150 replacements arrived from casual units. The 31st Quartermaster Pack Troop was also absorbed by the regiment. On 1 January 1944, the three battalions were formally activated as the 5307th Composite Unit (Provisional).
Source:
Merrill's Marauders - Introduction
The 31st and 33d Quartermaster Pack Troops, a detachment of the 835th Signal Service Battalion, and a platoon of the 502d Military Police Battalion were added to the unit early in January 1944.
Source:
Army Veterinary Service History Chapter XVI - Evacuation and Hospitalization
The 31st Quartermaster Pack Troop came into the theater from the Zone of Interior on 6 Jan. 1944, aboard the animal transport Samuel H. Walker which departed New Orleans Port of Embarkation, 14 Oct. 1943, with 329 mules and 26 horses. The 33d Quartermaster Pack Troop came into the theater during December 1943, but its animal transport, Jose Navarro, departing New Orleans Port of Embarkation with 330 mules and 28 horses, was sunk en route (26 Dec. 1944). Each shipment was accompanied by a transport veterinary detachment. For the campaign in North Burma, the latter pack troop was remounted with horses newly arrived from New Caledonia.
Other Sites of Interest:
Merrill's Marauders Association
Merrill's Marauders in Burma
Merrill's Marauders: February - May 1944 (US Army Center of Military History)
Merrill's Marauders: Combined Operations in Northern Burma in 1944 (US Army Center of Military History)
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