Today the Force Structure and Unit History Branch continues the work begun by the Historical Section of the Army War College. The branch maintains historical information on active and inactive units in all components - Regular Army, Army Reserve, and Army National Guard, and prepares official Lineage and Honors Certificates. On the basis of research in primary and secondary material, the certificates outline the major organizational changes undergone by the unit and provide a list of the official battle honors (campaign credit and decorations) that the unit has earned. The information contained on the certificates is reformatted for publication in the Army Lineage Series
While it would take a book to recount the rich history brought about by the
changes of each unit in the 12th Cavalry Regiment, an overall look at the major
reorganizational elements of the Regimental Lineage presents a picture of an
organization that was accustomed to fighting and brought strength from
change.
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02 February 1901; Constituted in the Regular Army as the 12th Cavalry Regiment. 08 February 1901; Organized at Fort Sam Houston, Texas, Colonel James N. Whelan, commanding. 24 March 1923; Assigned to the 2nd Cavalry Division. 03 January 1933; Relieved from the 2nd Cavalry Division and assigned to the 1st Cavalry Division. 28 February 1943; Dismounted. 04 December 1943; Reorganized partly under cavalry and partly under infantry tables of organization and equipment. 20 July 1945; Reorganized wholly as Infantry but retained cavalry designations. 25 March 1949; Inactivated at Otawa, Japan and relieved from assignment to 1st Cavalry Division. 15 February 1957; Reorganized as a parent regiment under the Combat Arms Regimental System. 16 April 1986; Withdrawn from the Combat Arms Regimental System and reorganized under the United States Army Regimental System. | |
1st Battalion, 12th Cavalry Regiment
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02 February 1901; Constituted in the Regular Army as Troop "A", 12th Cavalry. 25 March 1901; Organized at Fort Sam Houston. 24 March 1923; Assigned to the 2nd Cavalry Division. 03 January 1933; Relieved from the 2nd Cavalry Division and assigned to the 1st Cavalry Division. 28 February 1943; Dismounted. 04 December 1943; Reorganized partly under cavalry and partly under infantry tables of organization and equipment. 20 July 1945; Reorganized wholly as Infantry but retained cavalry designations. 25 March 1949; Inactivated at Otawa, Japan (12th Cavalry concurrently relieved from assignment to 1st Cavalry Division). 15 February 1957; Redesignated as Headquarters and Headquarters Troop, 1st Reconnaissance Squadron, 12th Cavalry, assigned to 1st Armored Division and activated at Fort Polk, Louisiana; concurrently consolidated with Headquarters and Headquarters and Service Company, 81st Reconnaissance Battalion. (see ANNEX 1 below) (Companies "A", "B", "C" & "D", 81st Reconnaissance Battalion; concurrently redesignated as Troops "A", "B", "C" & "D", 1st Reconnaissance Squadron, 12th Cavalry. 23 December 1957; Inactivated Troops "C" & "D", 1st Reconnaissance Squadron, 12th Cavalry. 20 April 1959; Reorganized and redesignated Headquarters and Headquarters Troops as Troop "A", 12th Cavalry; concurrently inactivated Troops "A" & "B", 1st Reconnaissance Squadron. 03 February 1962; Inactivated Troop "A", 12th Cavalry Regiment at Fort Hood, Texas and relieved from assignment to 1st Armored Division. 15 July 1963; Redesignated as Headquarters and Headquarters Company, 1st Battalion, 12th Cavalry and assigned to 1st Cavalry Division; concurrently redesignated Troops "A", "B" & "C", 1st Reconnaissance Squadron, 12th Cavalry as Companies "A", "B" & "C", 1st Battalion, 12th Cavalry. 01 September 1963; Activated Companies "A", "B" & "C", 1st Battalion, 12th Cavalry in Korea. 01 July 1965; Transferred (less personnel and equipment) from Korea to Fort Benning, Georgia and reorganized. [ANNEX 1 - 1st Battalion, 12th Cavalry Regiment]22 April 1940; 7th Reconnaissance and Support Squadron (Mechanized) constituted in the Regular Army. 01 June 1940; Activated at Fort Knox, Kentucky. 15 July 1940; Reorganized and redesignated as 1st Reconnaissance Battalion (Armored) and assigned to the 1st Armored Division. 08 May 1941; Redesignated as 81st Reconnaissance Battalion, (Armored). 01 January 1942; Redesignated 81st Reconnaissance Battalion. 20 July 1944; Reorganized and redesignated 81st Cavalry Reconnaissance Squadron, Mechanized. 01 May 1946; Converted and redesignated as 81st Constabulary Squadron; concurrently relieved from assignment to the 1st Armored Division and assigned to 3rd Constabulary Regiment. 20 September 1947; Inactivated in Germany and relieved from assignment to 3rd Constabulary Regiment. 27 February 1951; Converted and redesignated as 81st Reconnaissance Battalion and assigned to 1st Armored Division. 07 March 1951; Activated at Fort Hood, Texas. | |
2nd Battalion, 12th Cavalry Regiment
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02 February 1901; Constituted in the Regular Army as Troop "B", 12th Cavalry. 17 April 1901; Organized at Fort Sam Houston. 24 March 1923; Assigned to the 2nd Cavalry Division. 03 January 1933; Relieved from the 2nd Cavalry Division and assigned to the 1st Cavalry Division. 28 February 1943; Dismounted. 04 December 1943; Reorganized partly under cavalry and partly under infantry tables of organization and equipment. 20 July 1945; Reorganized wholly as Infantry but retained cavalry designations. 25 March 1949; Inactivated at Otawa, Japan (12th Cavalry concurrently relieved from assignment to 1st Cavalry Division). 15 February 1957; Redesignated as Headquarters and Headquarters Company, 2nd Battle Group, 12th Cavalry. 15 October 1957; Assigned to the 1st Cavalry Division. 15 November 1957; Activated in Korea. 01 September 1963; Inactivated and relieved from assignment to 1st Cavalry Division. 01 July 1965; Redesignated as 2nd Battalion, 12th Cavalry; concurrently assigned to the 1st Cavalry Division and activated at Fort Benning, Georgia. 29 June 1972; Inactivated at Fort Hood, Texas. 21 May 1975; Activated at Fort Hood, Texas. 15 December 1981; Inactivated at Fort Hood, Texas and relieved from assignment to the 1st Cavalry Division. 31 October 1986; Headquarters and Headquarters Company transfered to the United States Army Training and Doctrine Command and organized at Fort Knox, Kentucky. | |
3rd Squadron, 12th Cavalry Regiment
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02 February 1901; Constituted in the Regular Army as Troop "C", 12th Cavalry Regiment. 22 April 1901; Organized at Fort Sam Houston, Texas. 24 March 1923; 12th Cavalry Regiment assigned to the 2nd Cavalry Division. 01 February 1928; Troop "C", 12th Cavalry Regiment disbanded at Fort Brown, Texas. 22 March 1940; Reconstituted as Troop "C", 12th Cavalry Regiment. 01 August 1940; Activated at Fort Brown, Texas as an element of the 1st Cavalry Division.
28 February 1943; Dismounted and reorganized partly under cavalry and partly under infantry tables of organization and equipment. 20 July 1945; Reorganized wholly as Infantry but retained cavalry designations. 25 March 1949; Inactivated at Otawa, Japan and relieved from assignment to the 1st Cavalry Division. 15 February 1957; Redesignated as Headquarters and Headquarters Troop, 3rd Reconnaissance Squadron, 12th Cavalry.01 October 1957; Activated in Germany and assigned to 3rd Armored Division; concurrently consolidated with Headquarters and Headquarters Troop and Service Company, 83rd Reconnaissance Battalion. (see ANNEX 1 below). Companies "A", "B" & "C", 83rd Reconnaissance Battalion; concurrently redesignated as Troops "A", "B" & "C", 3rd Reconnaissance Squadron, 12th Cavalry. Troop "D" constituted and activated. 01 September 1963; Reorganized and redesignated as 3rd Squadron, 12th Cavalry. [ANNEX 1 - 3rd Squadron, 12th Cavalry Regiment]16 January 1941; 3rd Reconnaissance Battalion (Armored) constituted in the Regular Army and assigned to the 3rd Armored Division. 15 April 1941; Activated at Camp Polk, Louisiana. 08 May 1941; Redesignated as 83rd Reconnaissance Battalion (Armored). 01 January 1942; Redesignated as 83rd Reconnaissance Battalion. 10 November 1945; Inactivated in Germany.
07 July 1947; Reorganized and redesignated as 83rd Mechanized Cavalry Reconnaissance Squadron. 15 July 1947; Activated at Fort Knox, Kentucky. 30 July 1948; Reorganized and redesignated 83rd Reconnaissance Battalion. | |
4th Squadron, 12th Cavalry Regiment
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02 February 1901; Constituted in the Regular Army as Troop "D", 12th Cavalry Regiment. 24 April 1901; Organized at Fort Sam Houston, Texas. 20 August 1921; Redesignated as Headquarters Detachment, 6th Machine Gun Squadron./
30 April 1924; Headquarters Detachment, 6th Machine Gun Squadron, 12th Cavalry Regiment demobilized at Fort Brown, Texas. 16 November 1943; Reconstituted in the Regular Army and redesignated as Troop "D". an element of the 1st Cavalry Division. 04 December 1943; Activated at Brisbane, Australia. 20 July 1945; Reorganized wholly as Infantry but retained cavalry designations. 25 March 1949; Inactivated at Otawa, Japan and relieved from assignment to the 1st Cavalry Division. 15 February 1957; Redesignated as Headquarters and Headquarters Troop, 4th Reconnaissance Squadron, 12th Cavalry. 15 February 1962; Redesignated as Headquarters and Headquarters Troop, 4th Squadron, 12th Cavalry; concurrently assigned to 5th Infantry Division and activated at Fort Knox, Kentucky (organic elements concurrently constituted and activated). | |
5th Squadron, 12th Cavalry Regiment
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02 February 1901; Constituted in the Regular Army as Troop "E", 12th Cavalry Regiment. 04 May 1901; Organized at Fort Sam Houston, Texas. 24 March 1923; Assigned to the 2nd Cavalry Division. 03 January 1933; Relieved from the 2nd Cavalry Division and assigned to the 1st Cavalry Division. 28 February 1943; Dismounted. 04 December 1943; Reorganized partly under cavalry and partly under infantry tables of organization and equipment. 20 July 1945; Reorganized wholly as Infantry but retained cavalry designations. 25 March 1949; Inactivated at Otawa, Japan (12th Cavalry concurrently relieved from assignment to 1st Cavalry Division). 15 February 1957; Redesignated as Headquarters and Headquarters Troop, 5th Reconnaissance, 12th Cavalry. 15 March 1963; Redesignated as Headquarters and Headquarters Troop, 5th Squadron, 12th Cavalry; concurrently withdrawn from the Regular Army, allocated to the Army Reserve and assigned to 90th Infantry Division. 31 December 1965; Inactivated at San Antonio, Texas and relieved from assignment to the 90th Infantry Division. 16 December 1980; Redesignated as the 5th Battalion, 12th Cavalry; concurrently withdrawn from the Army Reserve System and allocated to the Regular Army. 31 October 1986; Redesignated as 5th Squadron, 12th Cavalry; Headquarters concurrently transferred to the United States Army Training and Doctrine Command and organized at Fort Knox, Kentucky. |
The history of the 12th Cavalry Regiment recorded the following significant
events occurring on the dates listed.
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1901
1901
1901-1902
1901-1902
1901-1902
1903
1903-1909
1911
1911
1911
1911-1913
1913
1913
1914
1914
1914
1914
1914
1914
1914
1915-1921
1916
1916
1919
1916
1921
1921
1923
1923
1923
1923
1924
1928
1933
1934
1940
1940
1940
1940
1940
1941
1941
1941
1941
1942
1941 1942 83rd Reconnaissance Battalion (Armored) redesignated as 83rd Reconnaissance Battalion. (01 January)
1943
1943
1943
1943
1943
1943
1943
1943
1944
1944
1944
1945
1945
1946
1947
1947
1947
1948
1949
1949
1949
1949
1949
1951
1951
1957
1957
1957
1957
1957
1957 1957 Headquarters and Headquarters Troop, 3rd Reconnaissance Squadron, 12th Cavalry activated in Germany and assigned to 3rd Armored Division; concurrently consolidated with Headquarters, Headquarters Troop and Service Company, 83rd Reconnaissance Battalion. (see Annex) Companies "A", "B" & "C", 83rd Reconnaissance Battalion redesignated as Troops "A", "B" & "C", 3rd Reconnaissance Squadron, 12th Cavalry. Troop "D" constituted and activated. (01 October)
1957
1957
1957
1959
1962
1962
1963
1963
1963
1963
1963
1965
1965
1965 1965 Camp Radcliff, An Khe, Vietnam (September)
1965
1966
1966
1967
1969
1970
1972
1975
1980
1981
1986
1986
1986
1992
1992
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