4th Brigade Combat Team or 4 BCT is a modularized brigade of the United States Army. Each division of the United States Army fields 4th Brigade Combat Teams numbered from 1-4.
The 101st Airborne Division (Air Assault) ("Screaming Eagles") is a light infantry division of the United States Army that specializes in air assault operations. It can plan, coordinate, and execute multiple battalion-size air assault operations to seize terrain. These operations can be conducted by mobile teams covering large distances, fighting behind enemy lines, and working in austere environments with limited or degraded infrastructure. Its unique battlefield mobility and high level of training have kept it in the vanguard of U.S. land combat forces in recent conflicts: for example, foreign internal defense and counterterrorism operations in Iraq, in Afghanistan in 2015–2016, and in Syria, as part of Operation Inherent Resolve in 2018–2021.
The 82nd Airborne Division is an airborne infantry division of the United States Army specializing in parachute assault operations into hostile areas with a U.S. Department of Defense mandate to be "on-call to fight any time, anywhere" at "the knife's edge of technology and readiness." Primarily based at Fort Liberty, North Carolina, the 82nd Airborne Division is part of the XVIII Airborne Corps. The 82nd Airborne Division is the U.S. Army's most strategically mobile division.
The 4th Infantry Division is a division of the United States Army based at Fort Carson, Colorado. It is composed of a division headquarters battalion, three brigade combat teams, a combat aviation brigade, a division sustainment brigade, and a division artillery.
A Parachute regiment is an airborne infantry military unit of paratroopers, trained in parachuting into a combat zone.
The 508th Infantry Regiment is an airborne infantry regiment of the United States Army, first formed in October 1942 during World War II. The 508th is a parent regiment under the U.S. Army Regimental System, and two battalions from the regiment are currently active: the 1st Battalion, 508th Parachute Infantry Regiment is assigned to the 3rd Brigade Combat Team, 82nd Airborne Division, and the 2nd Battalion, 508th Parachute Infantry Regiment is assigned to the 2nd Brigade Combat Team, 82nd Airborne Division. The regiment served in combat during World War II, and regimental elements have served in combat in the Dominican Republic, Vietnam, Grenada, Panama, Iraq and Afghanistan.

The 509th Infantry Regiment is an airborne infantry regiment of the United States Army. The unit was initially activated as a single battalion, the 504th Parachute Infantry Battalion, in October 1941 at Fort Benning, Georgia. Nicknamed "Geronimo", the 509th conducted the U.S. Army's first combat jump during World War II on 8 November 1942, flying 1,500 miles from England to seize Tafarquay airport in Oran, Algeria. The 509th made a total of five combat jumps during the war.

The 172nd Infantry Brigade was a light infantry brigade of the United States Army stationed at Fort Wainwright, Alaska and later moved its headquarters to Grafenwöhr, Germany. An active duty independent brigade, it was part of V Corps and was one of five active-duty, separate, brigade combat teams in the U.S. Army before its most recent inactivation on 31 May 2013.
The United States Army Forces Command (FORSCOM) is the largest United States Army command. It provides expeditionary, regionally engaged, campaign-capable land forces to combatant commanders. Headquartered at Fort Liberty, North Carolina, FORSCOM consists of more than 750,000 active Army, U.S. Army Reserve, and Army National Guard soldiers. FORSCOM was created on 1 July 1973 from the former Continental Army Command (CONARC), who in turn supplanted Army Field Forces and Army Ground Forces.
Reconnaissance, surveillance, and target acquisition (RSTA) refers to a joint doctrine of reconnaissance, surveillance and target acquisition conducted by the United States Armed Forces. RSTA operations are designed to support military operations at a strategic, operational, or tactical level, either by dedicated RSTA forces or those which possess the capability.

Multi-National Corps – Iraq (MNC-I) was a formerly multinational, later U.S. only, army corps created on 15 May 2004, fighting the Iraq War. Its superior body, the Multi-National Force-Iraq (MNF-I) had replaced Combined Joint Task Force 7 on May 15, 2004. The change was made due to "concerns that had existed for some period of time, that the Combined Joint Task Force 7 headquarters was not sufficient to handle the range of military operations in Iraq, including peace support, civil military operations, and at the same time conduct strategic engagement such as talking to the sheiks and talking to the political authorities."
The United States Army Regimental System (USARS) is an organizational and classification system used by the United States Army. It was established in 1981 to replace the Combat Arms Regimental System (CARS) to provide each soldier with continuous identification with a single regiment, and to increase a soldier's probability of serving recurring assignments with his or her regiment. The USARS was intended to enhance combat effectiveness by providing the opportunity for a regimental affiliation, thus obtaining some of the benefits of the traditional regimental system.
In military terms, 1st Brigade may refer to:
In the United States (US) military, a beret flash is a shield-shaped embroidered cloth that is typically 2.25 in (5.72 cm) tall and 1.875 in (4.76 cm) wide with a semi–circular base that is attached to a stiffener backing of a military beret. These flashes—a British English word for a colorful cloth patch attached to military headgear—are worn over the left eye with the excess cloth of the beret shaped, folded, and pulled over the right ear giving it a distinctive appearance.
In military terms, 4th Brigade may refer to:
2nd Brigade Combat Team or 2 BCT is a designation for modularized brigades of the United States Army. It may refer to:
1st Brigade Combat Team or 1 BCT is a modularized brigade of the United States Army.
3rd Brigade Combat Team or 3 BCT is a modularized brigade of the United States Army. It may refer to:
The 2nd Infantry Brigade Combat Team (Airborne), 11th Airborne Division is an airborne infantry brigade combat team (BCT) of the United States Army. The unit is stationed at Joint Base Elmendorf-Richardson in Anchorage, Alaska and is the only airborne brigade combat team in the Pacific Theater. It is also the newest airborne Infantry BCT and one of only five in the United States Army; the others are the three Infantry BCTs of the 82nd Airborne Division and the 173rd Airborne Brigade.
Train Advise Assist Command – East was a multinational military formation, part of NATO's Resolute Support Mission within Afghanistan. Until 2014 it was designated Regional Command East, part of the International Security Assistance Force (ISAF). The United States Army provided the force headquarters. The command headquarters was located in Laghman Province.
The 173rd Airborne Brigade is an airborne infantry brigade combat team (IBCT) of the United States Army based in Vicenza, Italy. It is the United States European Command's conventional airborne strategic response force for Europe.