The 9th Cavalry Regiment is a parent cavalry regiment of the United States Army. Historically, it was one of the Army's four segregated African-American regiments and was part of what was known as the Buffalo Soldiers. The regiment saw combat during the Indian and Spanish–American Wars. During Westward Expansion, the regiment provided escort for the early western settlers and maintained peace on the American frontier.
Reconnaissance, surveillance, and target acquisition (RSTA) groups the tasks of reconnaissance, surveillance and target acquisition conducted by the Department of Defense. RSTA supports military operations at a strategic, operational, or tactical level, either by dedicated RSTA forces or those which possess the capability.
The 199th Infantry Brigade (Light) is a unit of the United States Army which served in the Army Reserve from 1921 to 1940, in the active army from 1966 to 1970 (serving in the Vietnam War), briefly in 1991–1992 at Fort Lewis, and from 2007 as an active army training formation at Fort Moore.
The 66th Armor Regiment is the oldest armored unit in the United States Army, tracing its lineage to the 301st Tank Battalion which served with distinction soon after it was formed in the First World War; the 301st trained at Camp Meade, Maryland, where then-Cpt. Dwight D. Eisenhower was an instructor. It has often been rumored that the 301st, the parent unit of the 66th, was first commanded by Col. George S. Patton, but this appears not to have been the case; while Patton was the first officer assigned to the Tank Corps, and while the 301st Tank Battalion was the first unit formed, Patton went nearly immediately to France to train Americans attached to Allied commands. The 301st was the only American heavy tank battalion to have seen action in the war. After the war, the 301st transitioned in the Regular Army to become the 66th Infantry Regiment by way of the 16th Tank Battalion.
The 3rd Brigade Combat Team, 1st Cavalry Division is a combined arms armored brigade of the 1st Cavalry Division based in Fort Cavazos, TX. Major equipment includes the M1A2SEP Tanks, M2A3 & M3A3 Bradley infantry fighting vehicles, M109A7 Paladin howitzers, and M1114 up-armored Humvees.
The 73rd Cavalry Regiment is a Cavalry Regiment in the United States Army, first formed in 1941. The three squadrons of the 73rd Cavalry Regiment provide reconnaissance, surveillance, and target acquisition (RSTA) to the Brigade Combat Teams of the 82nd Airborne Division. 3rd Squadron is assigned to 1st Brigade, 1st Squadron is assigned to 2nd Brigade, and 5th Squadron is assigned to 3rd Brigade.
The 171st Infantry Brigade was an infantry brigade of the United States Army based at Fort Jackson, South Carolina. With a long history of serving, the brigade saw action during both World War I and World War II before it was inactivated in 1946. During the Cold War the brigade was once again activated for a period of ten years until again inactivated in 1972. In 2007 the brigade was reactivated as a training support unit and inactivated on 10 June 2016.
The 191st Infantry Brigade was constituted on 24 June 1921 in the Organized Reserves as Headquarters and Headquarters Company, 191st Infantry Brigade, and assigned to the 96th Division. It was organized in December 1921 at Portland, Oregon, and redesignated on 23 March 1925 as Headquarters and Headquarters Company, 191st Brigade, then redesignated on 24 August 1936 as Headquarters and Headquarters Company, 191st Infantry Brigade. It was converted and redesignated on 6 April 1942 as the 96th Reconnaissance Troop, 96th Division. The Troop was ordered into active military service on 15 August 1942 and reorganized at Camp Adair, Oregon, as the 96th Cavalry Reconnaissance Troop, an element of the 96th Infantry Division. It was reorganized and redesignated on 16 August 1943 as the 96th Reconnaissance Troop, Mechanized, and then again reorganized and redesignated on 20 November 1945 as the 96th Mechanized Cavalry Reconnaissance Troop. Following World War II service with the 96th Infantry Division in the Pacific, it was inactivated on 3 February 1946 at Camp Anza, California.
The 68th Armor Regiment is an armored regiment of the United States Army. It was first activated in 1933 in the Regular Army as the 68th Infantry Regiment.
The 18th Cavalry Regiment is a parent cavalry regiment of the United States Army.
The 33rd Armor Regiment was an armored regiment in the United States Army first formed in 1941. In 2005, the 33rd Armor was redesignated 33rd Cavalry Regiment. The 1st Squadron, 33rd Cavalry Regiment, a part of the 3rd Brigade Combat Team, 101st Airborne Division, carries on the lineage of 33rd Armor Regiment.
The 34th Armor Regiment is an armored regiment of the United States Army formed in 1941.
The 67th Armored Regiment is an armored regiment in the United States Army. The regiment was first formed in 1929 in the Regular Army as the 2nd Tank Regiment (Heavy) and redesignated as the 67th Infantry Regiment (Medium Tanks) in 1932. It first became the 67th Armor in 1940. The regiment participated in World War I, World War II, Desert Storm/Desert Shield, Operation Iraqi Freedom, Operation Enduring Freedom, Operation Spartan Shield, Operation Inherent Resolve, Operation Resolute Support, and Operation Freedom's Sentinel.
The 185th Armor Regiment was an armor regiment of the United States Army consisting of soldiers from the California Army National Guard.
The 51st Infantry Regiment is a regiment of the United States Army first established in 1917.
The 102nd Cavalry Regiment is a regiment of the United States Army first established in 1913 and which saw service in World War II.
The 194th Armor Regiment is an armored regiment of the Minnesota National Guard. The sole combat element of the regiment is 1st Combined Arms Battalion, a unit of the 34th Infantry Division of the United States Army.
The 303rd Cavalry Regiment is a United States cavalry regiment, currently represented in the Washington Army National Guard by the 1st Squadron, 303rd Cavalry, headquartered at Vancouver, Washington, part of the 96th Troop Command. It incorporates the lineage of the 303rd Cavalry, 303rd Armor, and 803rd Armor Regiments of the Washington Army National Guard.
United States 
