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3rd Squadron, 4th Cavalry Regiment

In 2006 as part of the transformation of the 25th Infantry Division to the US Army's new modular force structure, the 3rd Squadron, 4th Cavalry was inactivated and relieved from assignment to the Aviation Brigade, 25th Infantry Division. It was reorganized and reassigned to the 3rd Brigade Combat Team, 25th Infantry Division as the brigade's organic cavalry troop. Prior to the transformation the unit had been an air cavalry squadron. Its mission had been to prepare for worldwide deployment, and when directed, deploy to conduct reconnaissance and security operations to defeat enemy forces. It would have also, on order, exercised command and control over an aviation task force.

The 3rd Squadron, 4th Cavalry Regiment was originally constituted on 3 March 1855 in the Regular Army as Company C, 1st Cavalry. It was organized on 17 June 1855 at Jefferson Barrracks, Missouri. It was redesignated on 3 August 1861 as Company C, 4th Cavalry. Cavalry Companies were officially designated as Cavalry Troops in 1883. Between its activation in 1855 and the turn of the 20th century, Troop C, 4th Cavalry participated in 7 campaigns of the Indian Wars: Comanches, Little Big Horn, Cheyennes, Kansas 1857, Kansas 1860, Mexico 1873, and New Mexico 1882. It also served during the American Civil War in 20 campaigns: Bull Run, Mississippi River, Peninsula, Antietam, Fredericksburg, Murfreesborough, Chickamauga, Atlanta, Franklin, Nashville, Missouri 1861, Kentucky 1862, Mississippi 1862, Mississippi 1864, Tennessee 1863, Tennessee 1864, Alabama 1864, Alabama 1865, Georgia 1864, and Georgia 1865.

Troop C, 4th Cavalry also participated in the suppression of the Moro Insurrection in the Phillipines, to include another 10 campaigns: Manila, Malolos, Laguna de Bay, San Isidro, Cavite, Tarlac, Jolo, Luzon 1899, Luzon 1900, and Luzon 1901.

Troop C, 4th Cavalry was reorganized and redesignated on February 1928 as the Machine Gun Troop, 4th Cavalry. It was reorganized and redesignated on 1 February 1940 as the Service Troop, 4th Cavalry and on 16 April 1942 as the Service Troop, 4th Cavalry Mechanized. The unit was consolidated on 21 December 1943 with Headquarters Troop, 4th Cavalry and the consolidated unit was reorganized and redesignated as Headquarters Troop, 4th Cavalry Group, Mechanized. Going on to fight in the Second World War, the unit participated in 7 campaigns in both Europe and Pacific: Normandy (with arrowhead indicating participation in the initial assault), Rhineland, Ardennes-Alsace, Central Europe, Guadalcanal, Northern Solomons (with arrowhead indicating participation in the initial assault) and Luzon.

After the Second World War It was converted and redesignated on 1 May 1946 as Heaquarters and Service Toop, 4th constabulary regiment as part of occupation forces in Europe. The unit was reorganized and redesignated on 10 February 1948 as Headquarters and Service Troop, 4th Constabulary Regiment It was inactivated on 1 May 1949 in Austria.

Redesignated on 20 August 1953 as Headquarters Company, 4th Armored Cavalry. Former Troop C, 4th Cavalry, was withdrawn on 15 February 1957 and consolidated with Troop C, 4th Cavalry and the 25th Reconnaissance Company (active). Troop C, 4th Cavalry was first constituted on 1 February 1940 in the Regular Army as Troop C, 4th Cavalry. It was activated on 1 January 1941 at Fort Meade, South Dakota. It wa reorganized and redesignated on 16 April 1942 as Troop C, 4th Cavalry, Mechanized, on 21 December 1943 as Troop C, 24th Cavalry Reconnaissance Squadron, Mechanized, and on 1 May 1946 as Troop C, 24th Constabulary Squadron before being inactivated on 15 December 1952 in Germany. While inactive it was redesignated on 21 April 1953 as Company C, 524th Reconnaissance Battalion and again on 1 February 1957 as Troop C, 4th Cavalry. The 25th Reconnaissance Company was first constituted on 28 October 1942 in the Regular Army as the 25th Reconnaissance Troop, an element of the 25th Infantry Division and activated on 3 November 1942 at Schofield Barracks, Hawaii. The unit was reorganized and redesignated on 1 January 1944 as the 25th Cavalry Reconnaissance Troop, Mechanized. It was redesignated on 10 October 1945 as the 25th Mechanized Cavalry Reconnaissance Troop and again on 20 March 1949 as the 25th Reconnaissance Company. The 25th Reconnaissnace Company had participated in 10 campaigns during the Korean War: UN Defensive, UN Offensive, CCF Intervention, First UN Counteroffensive, CCF Spring Offensive, UN Summer-Fall Offensive, Second Korean Winter, Korea Summer-Fall 1952, Third Korean Winter, Korea, Summer 1953. These were added to the honors of the consolidated unit. The consolidated unit was reorganized and redesignated as Headquarters and Headquarters Troop, 3rd Reconnaissance Squadron, 4th Cavalry, an element of the 25th Infantry Division, with its organic elements concurrently constituted and activated.

The unit was reorganized and redesignated on 29 July 1963 as the 3rd Squadron, 4th Cavalry. 3-4th Cavalry participated in 12 campaigns of the conflict in Vietnam: Counteroffensive, Counteroffensive Phase II, Counteroffensive Phase III, Tet Counteroffensive, Counteroffensive Phase IV, Counteroffensive Phase V, Counteroffensive Phase VI, Tet 69/Counteroffensive, Summer-Fall 1969, Winter-Spring 1970, Sanctuary Counteroffensive, and Counteroffensive, Phase VII.

3-4th Cavalry was inactivated on 16 March 1987 in Hawaii and was relieved from assignment to the 25th Infantry Division. The unit was reassigned on 16 June 1989 to the 3rd Infantry Division and activated in Germany.

It was relieved on 16 February 1996 from assignment to the 3rd Infantry Division and assigned to the 25th Infantry Division as an element of the Aviation Brigade. In 2006 as part of the transformation of the 25th Infantry Division to the US Army's new modular force structure, the 3rd Squadron, 4th Cavalry was inactivated and relieved from assignment to the 25th Infantry Division. 2nd Battalion, 5th Infantry was reflagged as 3-4th Cavalry, which was reorganized and reassigned to the 3rd Brigade Combat Team, 25th Infantry Division as the brigade's organic cavalry troop. Prior to the transformation the unit had been an air cavalry squadron, as part of the Division's Aviation Brigade.