After the end of Operation Desert Storm/Shield

Gulf War

The Persian Gulf War , commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from 34 nations led by the United States, against Iraq in response to Iraq's invasion and annexation of Kuwait.The war is also known under other names, such as the First Gulf...

, the US Army inactivated many units. The units fighting the War on Terrorism are the survivors of the "Peace Dividend"

Peace dividend

The peace dividend is a political slogan popularized by US President George H.W. Bush and UK Prime Minister Margaret Thatcher in the early 1990s, purporting to describe the economic benefit of a decrease in defense spending. It is used primarily in discussions relating to the guns versus butter...

. While additional fighting brigades are being created, no additional deployable higher headquarters units are planned. This list is not comprehensive as it only includes active-duty formations under the divisional structure. There are many Reserve, National Guard, and support units not included or referenced here.

Field Armies

• First United States Army - U.S. Army Training, Readiness, and Mobilization Command
• Third United States Army - CENTCOM commands forces in Iraq
  Iraq
  Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....
  
   & Afghanistan
  Afghanistan
  Afghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...
  
  
• Fifth United States Army - United States Army North
• Sixth United States Army - United States Army South
• Seventh United States Army - United States Army Europe
  United States Army Europe
  United States Army Europe and Seventh Army, is an Army Service Component Command of the United States Army and the land component of United States European Command. It is the largest American formation in Europe.-Invasion of Sicily:...
  
  
• Eighth United States Army - United States Army Korea

Corps

• I Corps
• III Corps
• V Corps (inactivating)
• XVIII Airborne Corps

Divisions

• 1st Infantry Division "The Big Red One"
• 1st Cavalry Division "The First Team"
• 1st Armored Division
  1st Armored Division (United States)
  The 1st Armored Division—nicknamed "Old Ironsides"—is a standing armored division of the United States Army with base of operations in Fort Bliss, Texas. It was the first armored division of the U.S...
  
  "Old Ironsides"
• 2nd Infantry Division "Indian Head Division"
• 3rd Infantry Division "Rock of the Marne"
• 4th Infantry Division "Ivy Division", "Iron Horse"
• 10th Mountain Division "Climb to Glory"
• 25th Infantry Division "Tropic Lightning"
• 82nd Airborne Division "All American"
• 101st Airborne Division (Air Assault)
  101st Airborne Division
  The 101st Airborne Division—the "Screaming Eagles"—is a U.S. Army modular light infantry division trained for air assault operations. During World War II, it was renowned for its role in Operation Overlord, the D-Day landings on 6 June 1944, in Normandy, France, Operation Market Garden, the...
  
  "Screaming Eagles"