181st Infantry Brigade (United States)

World War I^[5]

During World War I, infantry brigades were purely tactical formations. Administrative and logistical functions were conducted by the division headquarters.^[6]

Headquarters, 181st Brigade

361st Infantry Regiment

362nd Infantry Regiment

347th Machine Gun Battalion^[7]

World War II

With the demise of the Square Division in favor of the Triangular division, the now surplus brigade headquarters were converted into either the divisional headquarters company or the division's reconnaissance troop. The 181st was selected to transform into the 91st Infantry Division's reconnaissance troop. ^[8]

91st Reconnaissance Troop .

Global War on Terror

Headquarters and Headquarters Company, Fort McCoy, Wisconsin.^[3][9]

1st Battalion, 291st Regiment (Brigade Support Battalion), Fort McCoy

1st Battalion, 310th Regiment (Brigade Engineer Battalion), Fort McCoy

1st Battalion, 337th Regiment (Brigade Support Battalion), Fort McCoy

1st Battalion, 338th Regiment (Training Support Battalion), Fort McCoy

1st Battalion, 340th Regiment (Training Support Battalion), Fort Snelling, Minnesota

3rd Battalion, 340th Regiment (Brigade Engineer Battalion), Fort McCoy

1st Battalion, 351st Regiment (Brigade Support Battalion), Fort McCoy

2nd Battalion, 361st Regiment (Training Support Battalion), Sioux Falls, South Dakota

1st Battalion, 383rd Regiment (Training Support Battalion), Des Moines, Iowa

2nd Battalion, 411th Regiment (Logistics Support Battalion), Fort McCoy

World War I

During World War I, the 181st Infantry Brigade was constituted 5 August 1917^[10] in the National Army at Camp Lewis, Washington as a subordinate unit of the 91st Infantry Division.^[3] The Brigade was composed of 8,134 personnel organized in a Headquarters Detachment with 5 Officers and 18 Enlisted Soldiers, the 361st and 362nd Infantry Regiments each with 3,755 Officers and Enlisted Soldiers, and the 347th Machine Gun Battalion with 581 Officers and Enlisted Soldiers.^[11] The 181st Infantry Brigade trained for 10 months at Camp Lewis prior to being deployed to France in August 1918^[12] under the command of Brig. Gen. John McDonald.^[13] After the Meuse-Argonne Offensive and the liberation of France, the Brigade was sent to assist the British during the battle of Ypres-Lys until the signing of the Armistice on 11 November 1918, which ended World War I. After four months of peacekeeping operations in liberated Belgium, the Brigade returned to the United States and arrived at the port of New York on 2 April 1919 on the U.S.S. Orizaba.^[12]

Inter War Period

The Brigade was transferred on 2 April 1919 to Camp Merritt, New Jersey. It proceeded to Camp Kearny, California, where it was demobilized on 19 April 1919. The Brigade was reconstituted in the Organized Reserve on 24 June 1921, still assigned to the 91st Division, and allotted to the Ninth Corps Area. The Brigade was redesignated Headquarters & Headquarters Company (HHC), 181st Brigade on 23 March 1925 and again redesignated HHC, 181st Infantry Brigade on 24 August 1936. The unit conducted summer training most years at Del Monte, California, from 1922–40. Subordinate regiments conducted training for the Citizens Military Training Camp (CMTC) at the Presidio of San Francisco, the Presidio of Monterey and at Del Monte; often with assistance from the 30th Infantry Regiment.^[14]

World War II

The 91st Reconnaissance Troop participated in the Rome-Arno (22 Jan 44 - 9 Sep 44), North Apennines (10 Sep 44 - 4 April 45), and Po Valley (5 Apr 45 - 8 May 45) campaigns. In July 1944, during the Arno Campaign of the Second World War, the 91st Reconnaissance Troop spearheaded Task Force Williamson under the command of Brigadier General E.S. Williamson, Assistant Division Commander for the 91st Division. The 2nd Platoon of the 91st Reconnaissance Troop and the 1st Battalion, 363rd Infantry were the first to enter Leghorn (Livorno) on its way to liberating Pisa.

• The Troops was composed of:
  • Officers: 6
  • Enlisted Soldiers: 149
• Equipment:
  • M8 Greyhound: 13
  • M3 Half-track: 5
  • 1/4 Ton Jeep: 24
  • M3 submachine gun: 30
  • M1 carbine: 99
  • M1 Garand: 26
  • M2 Browning: 3
  • M1919 Browning machine gun: 13
  • M9 Rocket Launcher: 5
  • M2 mortar: 9

^[15]

Post-War

After VE day, the Brigade was deactivated and reconstituted several times through 1945 as a headquarters and headquarters company and a reconnaissance troop. It was reactivated in 1947 as a mechanized cavalry reconnaissance troop; redesignated in 1949 as the 91st Reconnaissance Company.

The unit was active from April 1963 until December 1965 as the Headquarters and Headquarters Company, 2nd Brigade, 63rd Infantry Division. From January 1966 through December 2006, the unit was inactive.

Realignment as a Training Brigade

The 181st Infantry Brigade was reactivated at Fort McCoy, Wisconsin in December 2006. The Brigade trains soldiers, sailors and airmen to support contingency operations in the Global War on Terror. The 181st facilitates the WAREXs (Warrior Exercise) focused on platoon level training, and CSTXs (Combat Support Training Exercise)^[16][17][18] that focus on Company level training in support of the 86th Training Division and the 84th Training Command. Annually, the 181st provides battalions to serve as Observer/Controllers to the NTC and JRTC to train Army Reserve and National Guard units conducting rotations. The Brigade also provided Master Gunners and other subject matter experts to support Operation Cold Steel, a major initiative to improve the Army Reserve's gunnery training, from February through May 2018.^[19][20]

• 
  Fort McCoy historic gate
• 
  1-338th training deploying soldiers from the 101st Engineer Battalion September, 2009
• 
  3-340th training the 824th Quartermaster Company (Heavy Airdrop Supply) during CSTX August, 2015
• 
  1-337th BSB Observer/Controller-Trainer conducts an After-action review at Camp Ripley during CSTX 86-17-03