312th Military Intelligence Battalion
"Silent Warriors"

In 2005, the 312th Military Intelligence Battalion was inactivated. This inactivation was part of the transformation of the 1st Cavalry Division to the US Army's modular force structure. As a part of the transformation, assets previously held at division level, but habitually assigned to brigades were made organic to those brigades.

The 312th Military Intelligence Battalion, "Silent Warriors," was originally constituted on 31 December 1943 in the Army of the United States as the 23rd Signal Construction Battalion. It was activated on 10 February 1944 at Camp Pickett, Virginia.

It was reorganized and redesignated on 24 April 1944 as the 23rd Signal Light Construction Battalion, and on 21 August 1944 as the 23rd Signal Heavy Construction Battalion. It inactivated on 22 January 1946 at Fort Lawton, Washington.

The Battalion was redesignated on 27 September 1951 as the 23rd Signal Construction Battalion and allotted to the regular Army. It was activated on 2 November 1951 in Korea and inactivated there on 15 May 1953.

The unit was subsequently converted and redesignated on 19 May 1955 as the 312th Communications Reconnaissance Battalion. Its Headquarters and Headquareters Company was activated on 25 June 1955 in Germany. The 312th was redesignated on 1 July 1956 as the 312th Army Security Agency Battalion, while its Headquarters and Headquarters Company was inactivated on 15 October 1957 in Germany.

The 312th Army Security Agency Battalion was redesignated 1 October 1981 as the 312th Military Intelligence Battalion, and assigned to the 1st Cavalry Division, activating in the process at Fort Hood, Texas. The 371st Army Security Agency Company was concurrently consolidated with Company A, 312th Military Intelligence Battalion, while the 191st Military Intelligence Company consolidated with Company B.

In 2005, the 312th Military Intelligence Battalion was inactivated. This inactivation was part of the transformation of the 1st Cavalry Division to the US Army's modular force structure. As a part of the transformation, assets previously held at division level, but habitually assigned to brigades were made organic to those brigades. Military intelligence elements were integrated into the special troops battalions of the modular brigade combat teams. B Company was reflagged as A Company, Special Troops Battalion, 2nd Brigade Combat Team, 1st Cavalry Division.