1st and 3rd counter motor radar units were assigned to FOB Marez, Mosul, Iraq.

Battery C was based out of COB Adder, Tallil, Iraq carrying out the mission of convoy security.

In July 2019, Governor Greg Abbot ordered additional 1,000 National Guard Soldiers to assist in a Supplemental Holding Facility Mission to augment Department of Homeland Security (DHS) operations along the southern border.

In November 2019, 4th Battalion deployed to the Middle East in support of Operation Inherent Resolve.

During 4-133’s deployment - its first overseas tour since World War II - Soldiers conducted operations in Syria, Egypt, Afghanistan, the United Arab Emirates, Kuwait, and Yemen, firing a total of 87 missions in support of U.S. combat operations.

1-133 Field Artillery officially assumed MFO responsibilities on November 24, 2020, relieving 1st Squadron, 112th Cavalry Regiment, also of the Texas Army National Guard.

Organized 20 September 1899 in the Texas Volunteer Guard at El Paso as the Border Rifles and assigned to the 4th Infantry Regiment as Company B (Texas Volunteer Guard redesignated 1 July 1903 as the Texas National Guard) Expanded 18 July 1905 to form Companies B and K, 4th Infantry Regiment (Company B—hereafter separate lineage) Company K, 4th Infantry Regiment, mustered into federal service 18 May 1916; mustered out of federal service 24 March 1917 Mustered into federal service 11 April 1917; drafted into federal service 5 August 1917 Reorganized and redesignated 15 October 1917 as Company G, 144th Infantry, an element of the 36th Division Demobilized 21 June 1919 at Camp Bowie, Texas Expanded, reorganized, and federally recognized 11 May 1922 in the Texas National Guard as the 2d Battalion, 141st Infantry, an element of the 36th Division (later redesignated as the 36th Infantry Division), with headquarters at El Paso Inducted into federal service 25 November 1940 at home stations Inactivated 22 December 1945 at Camp Patrick Henry, Virginia Converted (less Companies F and G), reorganized, and federally recognized 2 December 1946 as the 696th Antiaircraft Artillery Automatic Weapons Battalion, with headquarters at El Paso; concurrently relieved from assignment to the 36th Infantry Division (Companies F and G, 141st Infantry-hereafter separate lineages) Redesignated 1 May 1949 as the 136th Antiaircraft Artillery Automatic Weapons Battalion and assigned to the 36th Infantry Division Redesignated 1 October 1953 as the 136th Antiaircraft Artillery Battalion Consolidated 16 March 1959 with the 132d (see ANNEX 1), 133d (see ANNEX 2), and 155th (see ANNEX 3) Field Artillery Battalions to form the 133d Artillery, a parent regiment under the Combat Arms Regimental System, to consist of the 1st, 2d, 3d, 4th, and 5th Howitzer Battalions, elements of the 36th Infantry Division Reorganized 1 March 1963 to consist of the 2d, 3d, 4th, and 5th Howitzer Battalions, elements of the 36th Infantry Division Reorganized 1 November 1965 to consist of the 2d, 3d, and 5th Battalions, elements of the 36th Infantry Division, and the 4th Battalion, an element of the 36th Infantry Brigade Reorganized 15 January 1968 to consist of the 1st Battalion, an element of the 71st Airborne Brigade, the 3d Battalion, and the 4th Battalion, an element of the 36th Infantry Brigade Redesignated 1 May 1972 as the 133d Field Artillery Reorganized 1 November 1973 to consist of the 1st, 3d, and 4th Battalions, elements of the 49th Armored Division Reorganized 1 September 1979 to consist of the 1st, 3d, and 4th Battalions and Battery E, elements of the 49th Armored Division Withdrawn 4 March 1987 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System Reorganized 1 September 1999 to consist of the 1st, 3d, and 4th Battalions, elements of the 49th Armored Division Constituted 5 May 1917 in the Texas National Guard as the 1st Battalion, 2d Field Artillery Organized June–July 1917 in north central Texas Drafted into federal service 5 August 1917 Reorganized and redesignated 15 October 1917 as the 1st Battalion, 131st Field Artillery, an element of the 36th Division Demobilized 2 April 1919 at Camp Travis, Texas Reorganized in 1922 in the Texas National Guard as the 1st Battalion, 131st Field Artillery, an element of the 36th Division; Headquarters federally recognized 29 October 1922 at Plainview Inducted into federal service 25 November 1940 at home stations Reorganized and redesignated 9 February 1942 as the 131st Field Artillery Battalion, an element of the 36th Infantry Division Inactivated 26 December 1945 at Camp Patrick Henry, Virginia Expanded 2 July 1946 to form the 131st and 132d Field Artillery Battalions, elements of the 36th Infantry Division (131st Field Artillery Battalion-hereafter separate lineage) 132d Field Artillery Battalion reorganized and federally recognized 10 July 1947 in western Texas with headquarters at Lubbock Organized in 1922 in the Texas National Guard from new and existing units as the 2d Battalion, 132d Field Artillery, an element of the 36th Division; Headquarters federally recognized 28 January 1923 at Corsicana Inducted into federal service 25 November 1940 at home stations Reorganized and redesignated 9 February 1942 as the 155th Field Artillery Battalion, an element of the 36th Infantry Division Redesignated 5 November 1942 as the 133d Field Artillery Battalion Inactivated 18 December 1945 at Camp Patrick Henry, Virginia Reorganized and federally recognized 12 May 1947 with headquarters at Corsicana Constituted 5 May 1917 in the Texas National Guard as the 1st Field Artillery Organized 4 June 1917 with headquarters at Dallas Drafted into federal service 5 August 1917 Redesignated 15 October 1917 as the 133d Field Artillery and assigned to the 36th Division Demobilized 2 April 1919 at Camp Bowie, Texas Reorganized 1 June 1936 in the Texas National Guard as the 133d Field Artillery and assigned to the 36th Division; Headquarters federally recognized 9 July 1936 at San Antonio Inducted into federal service 25 November 1940 at home stations Regiment broken up 9 February 1942 and its elements reorganized and redesignated as follows: Headquarters disbanded 1st Battalion as the 133d Field Artillery Battalion, an element of the 36th Infantry Division (Headquarters Battery consolidated with the Pioneer Company, 626th Tank Destroyer Battalion; 2d Battalion as the 2d Battalion, 202d Field Artillery—hereafter separate lineages) 133d Field Artillery Battalion redesignated 5 November 1942 as the 155th Field Artillery Battalion Inactivated 18 December 1945 at Camp Patrick Henry, Virginia Expanded 2 July 1946 to form the 155th Field Artillery Battalion, an element of the 36th Infantry Division, and the 749th Armored Ordnance Battalion, an element of the 49th Armored Division (749th Armored Ordnance Battalion—hereafter separate lineages) 155th Field Artillery Battalion consolidated with Headquarters, 133d Field Artillery (reconstituted 25 August 1945 in the Texas National Guard), and consolidated unit reorganized and federally recognized 10 February 1947 in central Texas as the 155th Field Artillery Battalion with headquarters at New Braunfels A Gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Gules, a bend Azure fimbriated Or between a fleur-de-lis and a Mexican sombrero of the last.

Attached below the shield a Gold motto scroll inscribed “DUM SPIRAMUS TUEBIMUR” in Blue letters.

The distinctive unit insignia was originally approved for the 133d Field Artillery Regiment on 11 August 1937.

That for the regiments and separate battalions of the Texas Army National Guard: On a wreath of the colors Or and Gules a mullet Argent encircled by a garland of live oak and olive Proper.