The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment during World War II, is an airborne light infantry regiment of the United States Army. Currently a parent regiment under the U.S. Army Regimental System, the regiment has two active battalions: the 1st Battalion, 506th Infantry Regiment is assigned to the 1st Brigade Combat Team, 101st Airborne Division, and the 2nd Battalion, 506th Infantry Regiment is assigned to the 3rd Brigade Combat Team, 101st Airborne Division.
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 22nd Infantry Regiment is a parent regiment of the United States Army. Currently the 2nd Battalion is active, with the regimental colors residing at Fort Drum, New York. The 1st, 3rd, and 4th Battalions have been inactivated.
The 325th Infantry Regiment is an infantry regiment of the 82nd Airborne Division. The regiment serves as the 82nd Airborne's light infantry parachute insertion fighting force of the United States Army, with a long and distinguished history, having taken part in World War I, World War II, the Vietnam War, the invasions of Grenada and Panama, as well as the Gulf and Iraq Wars. The subordinate units of the regiment constitute the bulk of the infantry elements assigned to the 2nd Infantry Brigade Combat Team, 82nd Airborne Division.
The 12th Infantry Regiment is a unit of the United States Army. The 12th Infantry has fought in seven wars from the Civil War to the Global War on Terrorism and has been awarded 19 Presidential Unit Citations, five Valorous Unit Awards, a Joint Meritorious Unit Award, two citations in the Order of the Day of the Belgian Army, Nine Republic of Vietnam Crosses of Gallantry, the Republic of Vietnam Civil Action Honor Medal Third Class, a Meritorious Unit Commendation, and the Belgian Fourragere.
The 1st Battalion, 227th Aviation Regiment is an attack helicopter battalion of the Combat Aviation Brigade, 1st Cavalry Division. The battalion is an AH-64 Apache battalion based at Fort Cavazos, Texas.
The 87th Infantry Regiment is an infantry regiment in the United States Army. The regiment's 1st and 2nd Battalions are light infantry units assigned to the 1st and 2nd Brigade Combat Teams respectively of the 10th Mountain Division located at Fort Drum, New York. The 3rd Battalion was active in the U.S. Army Reserve in Colorado. The 4th Battalion was a Regular Army unit assigned to the 3rd Brigade Combat Team of the 25th Infantry Division (Light) at Schofield Barracks, Hawaii.
The 2nd Infantry Regiment is an infantry regiment in the United States Army that has served for more than two hundred years. It was constituted on 12 April 1808 as the 6th Infantry and consolidated with 4 other regiments in 1815 to form the present unit.
The 20th Infantry Regiment is a United States Army infantry regiment. Currently only the 5th Battalion of the 20th Infantry still exists. Stationed at Joint Base Lewis-McChord and part of the 1st Stryker Brigade Combat Team, 2nd Infantry Division, 5-20 Infantry was one of the original battalions selected to take part in the testing and fielding of the U.S. Army's then-new Stryker vehicle. During the Vietnam War, elements of the regiment carried out the My Lai massacre.
The 3rd Brigade Combat Team, 10th Mountain Division is an infantry brigade combat team of the United States Army based at Fort Johnson, Louisiana. Since its activation in 2004, the brigade has deployed four times to Afghanistan in support of Operation Enduring Freedom. In 2014, the brigade inactivated at Fort Drum, NY, and its infantry battalions were reassigned to other brigades while its special troops battalion, field artillery battalion, brigade support battalion and cavalry squadron were inactivated. The brigade reactivated at Fort Polk, LA in 2015 by re-flagging the assets of the 4th Brigade Combat Team, 10th Mountain Division, which was inactivated. The infantry, cavalry and field artillery battalions of the 4th Brigade were reassigned to the 3rd Brigade. The brigade deployed to Iraq in 2017 in support of Operation Inherent Resolve. Recently, the brigade deployed to the Southwest Border in 2019 in support of Operation Faithful Patriot.
The 37th Engineer Battalion is an airborne engineer battalion in the United States Army, and currently subordinate to the 2d Brigade Combat Team, 82d Airborne Division, based at Fort Bragg, North Carolina. The 37th Engineer Battalion was reactivated in the 82d Airborne Division as part of the United States Army new BCT 2020 concept in which each BCT's Special Troops Battalions would be inactivated and reactivated as Brigade Engineer Battalions. Prior to this, the battalion was a subordinate unit of the 20th Engineer Brigade assigned to XVIII Airborne Corps.
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.
The 4th Brigade Combat Team, 10th Mountain Division is an inactive infantry brigade combat team. Based at Fort Polk, Louisiana, the brigade was active from 2005 to 2015. It was a subordinate formation of the 10th Mountain Division.
The 15th Field Artillery Regiment (FAR) is a field artillery regiment of the United States Army first formed in 1916. A parent regiment under the U.S. Army Regimental System, the 15th FAR currently has two active battalions: the 1st Battalion, 15th Field Artillery Regiment, is assigned to the 1st Brigade Combat Team, 2nd Infantry Division, while the 2nd Battalion, 15th Field Artillery Regiment, is assigned to the 2nd Brigade Combat Team, 10th Mountain Division.
The 32nd Field Artillery Regiment is a distinguished and highly decorated field artillery regiment of the United States Army, first Constituted in 1918.
The 377th Field Artillery Regiment is a field artillery regiment of the United States Army. A parent regiment under the U.S. Army Regimental System, the regiment's 2nd Battalion, 377th Field Artillery Regiment is assigned to the 2nd Infantry Brigade Combat Team (Airborne), 11th Airborne Division. Elements of the regiment have also served with the 101st Airborne Division and 82nd Airborne Division, and have seen service in World War II, Vietnam, and in both Iraq and Afghanistan during the Global War on Terror. The 1st and 3rd Battalions as well as Batteries D and E are Inactive.
The 10th Aviation Regiment is an aviation regiment of the U.S. Army.
The 2nd Brigade Combat Team, 1st Armored Division is an Armored Brigade Combat Team of the United States Army, stationed at Fort Bliss, TX. First organized in 1942, as Combat Command B, 1st Armored Division, the unit fought in North Africa and Italy in World War 2, in Operation Desert Storm and in Operation Iraqi Freedom. The brigade has been stationed at Fort Hood, TX and in Germany.
The 4th Brigade Combat Team, 4th Infantry Division is an inactive brigade of the United States Army. Between 1975 and 1984, the brigade served at Fort Carson, CO, and in Germany. The brigade was reactivated in 2004, and deployed four times in support of the War on Terror, once to Iraq and three times to Afghanistan, before being inactivated in 2015.
The 1st Battalion, 503rd Infantry Regiment is an active duty airborne infantry battalion in the United States Army, assigned to the 173rd Airborne Brigade Combat Team and stationed in Vicenza, Italy. The battalion has served with the 2nd Infantry Division, the 11th Airborne Division, the 24th Infantry Division, the 82nd Airborne Division, and the 173rd Airborne Brigade; has been stationed in Korea, Italy and the United States; and earned campaign credits in World War II, the Vietnam War, Operation Enduring Freedom-Afghanistan, and Operation Iraqi Freedom.
United States of America
United States Army 
10th Mountain Division 
