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1901
Constituted in the Regular Army as the 12th Cavalry Regiment. (02
February)
1901
Fort Sam Houston, Texas Organized at Fort Sam Houston with Colonel
James N. Whelan, commanding. (08 February)
1st Squadron, Troops "A", "B", "C" & "D"
2nd Squadron, Troops "E", "F", "G" & "H"
3rd Squadron, Troops "I", "K". "L" & "M"
1901-1902
Fort Bliss, Texas
Troops
1901-1902
Fort Clark, Texas
Troops
1901-1902
Fort McIntosh, Texas
Troops
1903
Fort ?, Philippines; The Philippine Insurgence. (30 June)
1st Squadron, Troops "A", "B", "C" & "D"
2nd Squadron, Troops "E", "F", "G" & "H"
3rd Squadron, Troops "I", "K". "L" & "M"
1903-1909
Fort Oglethorpe, Georgia
1st Squadron, Troops "A", "B", "C" & "D"
2nd Squadron, Troops "E", "F", "G" & "H"
3rd Squadron, Troops "I", "K". "L" & "M"
1911
Fort Robinson, Nebraska (February)
1st Squadron, Troops "A", "B", "C" & "D"
2nd Squadron, Troops "E", "F", "G" & "H"
1911
Fort Huachua, Arizona
Troops "I" & "K"
1911
Fort Mead, South Dakota
Troops "L" & "M"
1911-1913
Gallup, New Mexico (November)
1st Squadron, Troops "A", "B", "C" & "D"
1913
Fort Bliss, Texas (December)
1st Squadron, Troops "A", "B", "C" & "D"
1913
Fort D. A. Russell, Wyoming
Troops "E" & "F"
1914
San Bonito, Texas
Troop
1914
Harlington, Texas
Troop
1914
Morcedes, Texas
Troop
1914
Donna, Texas
Troop
1914
Trinidad, Colorado coal strike.
Troops
1914
Fort D. A. Russell, Wyoming
Troops
1914
Fort Robinson, Nebraska (February)
Troops
1915-1921
Corozal, Canal Zone (22 February)
1st Squadron, Troops "A", "B", "C" & "D"
1916
Columbus, New Mexico
2nd Squadron, Troops "E", "F", "G" & "H"
1916
Hachet, New Mexico (April)
3rd Squadron, Troops "I", "K", "L" & "M"
1919
Hachet, New Mexico
2nd Squadron, Troops "E", "F", "G" & "H"
1916
Columbus, New Mexico
3rd Squadron, Troops "I", "K", "L" & "M"
1921
12th Cavalry assigned to the 3rd Cavalry Division
1921
Troop "D" redesignated as Headquarters Detachment, 6th Machine Gun
Squadron. (20 August)
1923
12th Cavalry assigned to the 2nd Cavalry Division. (24 March)
1923
Fort Ringgold, Texas
Troops
1923
Fort Brown, Texas
Troops
1923
Troop "C", 12th Cavalry Regiment assigned to the 2nd Cavalry Division.
(24 March)
1924
Headquarters Detachment, 6th Machine Gun Squadron, 12th Cavalry
Regiment demobilized at Fort Brown, Texas. (30 April)
1928
Troop "C", 12th Cavalry Regiment disbanded at Fort Brown, Texas. (01
February)
1933
Relieved from the 2nd Cavalry Division and assigned to the 1st Cavalry
Division.
Fort Ringgold, Texas
Troops
Fort Brown, Texas
Troops
1934
By order of The Secretary of War, /s/ E. T. Conley, Brigadier General,
the saber was discontinued as an item of issue. (18 April)
1940
Troop "C", 12th Cavalry Regiment reconstituted. (22 March)
1940
7th Reconnaissance and Support Squadron (Mechanized) constituted in
the Regular Army. (22 April)
1940
7th Reconnaissance and Support Squadron activated at Fort Knox,
Kentucky. (01 June)
1940
7th Reconnaissance and Support Squadron reorganized and redesignated
as 1st Reconnaissance Battalion (Armored) and assigned to the 1st
Armored Division. (15 July)
1940
Troop "C" activated at Fort Brown, Texas as an element of the 1st
Cavalry Division. (01 August)
1941
3rd Reconnaissance Battalion (Armored) constituted in the Regular
Army and assigned to the 3rd Armored Division. (16 January)
1941
Fort Bliss, Texas (05 February)
1st Squadron, Troops "A", "B", "C" & "D"
2nd Squadron, Troops "E", "F", "G" & "H"
3rd Squadron, Troops "I", "K". "L" & "M"
1941
3rd Reconnaissance Battalion (Armored) activated at Camp Polk,
Louisiana. (15 April)
1941
1st Reconnaissance Battalion (Armored) redesignated as 81st
Reconnaissance Battalion (Armored). (08 May)
1942
81st Reconnaissance Battalion (Armored) redesignated 81st
Reconnaissance Battalion. (01 January)
1941
3rd Reconnaissance Battalion (Armored) redesignated as 83rd
Reconnaissance Battalion (Armored). (08 May)
1942
83rd Reconnaissance Battalion (Armored) redesignated as 83rd
Reconnaissance Battalion. (01 January)
1943
12th Cavalry dismounted. (28 February)
1943
Reorganized partly under cavalry and partly under infantry tables of
organization and equipment. (04 December)
1943
Camp Stoneman, California (June)
1943
Brisbane, Queensland, Australia (August)
1943
Admiralty Islands, Pacific Theater (December)
1943
Leyte, Pacific Theater (October)
1943
Headquarters Detachment, 6th Machine Gun Squadron, 12th Cavalry
reconstituted in the Regular Army and redesignated as Troop "B", an
element of the 1st Cavalry Division. (16 November)
1943
Troop "B", 12th Cavalry reactivated at Brisbane, Australia. (04
December)
1944
Luzon, Pacific Theater (January)
1944
81st Reconnaissance Battalion (Armored) reorganized and redesignated
81st Cavalry Reconnaissance Squadron, Mechanized. (20 July)
1944
Tokyo, Japan (08 September)
1945
Reorganized wholly as Infantry but retained cavalry designations. (20
July)
1945
83rd Reconnaissance Battalion inactivated in Germany. (10
November)
1946
81st Cavalry Reconnaissance Squadron, Mechanized converted and
redesignated as 81st Constabulary Squadron; concurrently relieved from
assignment to the 1st Armored Division and assigned to 3rd
Constabulary Regiment. (01 May)
1947
83rd Reconnaissance Battalion reorganized and redesignated as 83rd
Mechanized Cavalry Reconnaissance Squadron. (07 July)
1947
83rd Mechanized Cavalry Reconnaissance Battalion activated at Fort
Knox, Kentucky. (15 July)
1947
81st Constabulary Squadron inactivated in Germany and relieved from
assignment to 3rd Constabulary Regiment. (20 September)
1948
83rd Mechanized Cavalry Reconnaissance Battalion reorganized and
redesignated 83rd Reconnaissance Battalion. (30 July)
1949
Troop "A", 12th Cavalry inactivated at Otawa, Japan and relieved from
the 1st Cavalry Division. (25 March)
1949
Troop "B", 12th Cavalry inactivated at Otawa, Japan and relieved from
the 1st Cavalry Division. (25 March)
1949
Troop "C", 12th Cavalry inactivated at Otawa, Japan and relieved from
the 1st Cavalry Division. (25 March)
1949
Troop "D", 12th Cavalry inactivated at Otawa, Japan and relieved from
the 1st Cavalry Division. (25 March)
1949
Troop "E", 12th Cavalry inactivated at Otawa, Japan and relieved from
the 1st Cavalry Division. (25 March)
1951
81st Constabulary Squadron converted and redesignated as 81st
Reconnaissance Battalion and assigned to 1st Armored Division. (27
February)
1951
81st Reconnaissance Battalion activated at Fort Hood, Texas. (07
March)
1957
Reorganized as a parent regiment under the Combat Arms Regimental
System. (15 February)
1957
Troop "A" 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) (Companies "A", "B", "C" &
"D", 81st Reconnaissance Battalion; concurrently redesignated as
Troops "A", "B", "C" & "D", 1st Reconnaissance Squadron, 12th Cavalry.
(15 February)
1957
Troop "B", 12th Cavalry redesignated as Headquarters and Headquarters
Company, 2nd Battle Group, 12th Cavalry. (15 February)
1957
Troop "C" redesignated as Headquarters and Headquarters Troop, 3rd
Reconnaissance Squadron, 12th Cavalry. (15 February)
1957
Troop "D" redesignated as Headquarters and Headquarters Troop, 4th
Reconnaissance, 12th Cavalry; concurrently assigned to 5th Infantry
Division and activated at Fort Knox, Kentucky. (15 February)
1957
Troop "E" redesignated as Headquarters and Headquarters Troop, 5th
Reconnaissance, 12th Cavalry. (15 February)
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
Headquarters and Headquarters Company, 2nd Battle Group, 12th Cavalry
assigned to the 1st Cavalry Division. (15 October)
1957
Headquarters and Headquarters Company, 2nd Battle Group, 12th Cavalry
activated in Korea. (15 November)
1957
Inactivated Troops "C" & "D", 1st Reconnaissance Squadron, 12th
Cavalry. (23 December)
1959
Reorganized and redesignated Headquarters and Headquarters Troops as
Troop "A", 12th Cavalry; concurrently inactivated Troops "A" & "B",
1st Reconnaissance Squadron. (20 April)
1962
Troop "A", 12th Cavalry inactivated at Fort Hood, Texas and relieved
from assignment to 1st Armored Division. (03 February)
1962
Headquarters and Headquarters Troop, 4th Reconnaissance Squadron
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). (15 February)
1963
Headquarters and Headquarters Troop, 5th Reconnaissance 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. (15 March)
1963
Troop "A" redesignated as Headquarters and Headquarters Company, 1st
Battalion, 12th Cavalry and assigned to 1st Cavalry Division;
concurrently Troops "A", "B" & "C", 1st Reconnaissance Squadron, 12th
Cavalry redesignated as Companies "A", "B" & "C", 1st Battalion, 12th
Cavalry. (13 July)
1963
Activated Companies "A", "B" & "C", 1st Battalion, 12th Cavalry in
Korea. (01 September)
1963
Troops "A", "B" & "C", 3rd Reconnaissance Squadron reorganized and
redesignated as 3rd Squadron, 12th Cavalry. (01 September)
1963
Headquarters and Headquarters Company, 2nd Battle Group inactivated
and relieved from assignment to 1st Cavalry Division. (01
September)
1965
Headquarters and Headquarters Company, 1st Battalion, 12th Cavalry
transferred (less personnel and equipment) from Korea to Fort Benning,
Georgia and reorganized. (01 July)
1965
Headquarters and Headquarters Company, 2nd Battle Group redesignated
as 2nd Battalion, 12th Cavalry; concurrently assigned to the 1st
Cavalry Division and activated at Fort Benning, Georgia. (01 July)
1965
Fort Benning, Georgia
Transferred, less personnel and equipment, re-equipped and filled with
personnel of the 11th Air Assault Division (Test). (03 July)
1965
Camp Radcliff, An Khe, Vietnam (September)
1965
Headquarters and Headquarters Troop, 5th Squadron, 12th Cavalry
inactivated at San Antonio, Texas and relieved from assignment to the
90th Infantry Division. 31 December)
1966
SSG Jimmy G. Stewart, B-2/12 Cavalry earns the Medal of Honor. (18
May)
1966
SSGT Delbert O. Jennings, C-1/12 Cavalry earns the Medal of Honor.
(27 December)
1967
SGT Allen James Lynch, D-1/12 Cavalry earns the Medal of Honor. (15
December)
1969
SGT Rodney J. Evans, D-1/12 Cavalry earns the Medal of Honor. (18
July)
1970
SP4 John P. Baca, D-1/12 Cavalry earns the Medal of Honor. (10
February)
1972
2nd Battalion, 12th Cavalry inactivated at Fort Hood, Texas. (29
June)
1975
2nd Battalion, 12th Cavalry activated at Fort Hood, Texas. (21
May)
1980
Headquarters and Headquarters Troop, 5th Squadron, 12th Cavalry
redesignated as the 5th Battalion, 12th Cavalry; concurrently
withdrawn from the Army Reserve System and allocated to the Regular
Army. (16 December)
1981
2nd Battalion, 12th Cavalry inactivated at Fort Hood, Texas and
relieved from assignment to the 1st Cavalry Division. (15
December)
1986
12th Cavalry Regiment withdrawn from the Combat Arms Regimental
System and reorganized under the United States Army Regimental System.
(16 April)
1986
Headquarters and Headquarters Company, 2nd Battalion, 12th Cavalry
transfered to the United States Army Training and Doctrine Command
and organized at Fort Knox, Kentucky. (31 October)
1986
5th Battalion, 12th Cavalry redesignated as 5th Squadron, 12th
Cavalry; Headquarters concurrently transferred to the United States
Army Training and Doctrine Command and organized at Fort Knox,
Kentucky. (31 October)
1992
3rd Battalion, 32nd Armored Regiment was redesignated 1st Battalion,
12th Cavalry Regiment. (16 December)
1992
1st Battalion, 32nd Armored Regiment was redesignated 2nd Battalion,
12th Cavalry Regiment. (16 December)

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