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In 1989, the United States Army Pacific had its headquarters at Fort Shafter in Hawaii, and its units were stationed within the United States. Overseas forces included the US Army Japan, and the Eighth US Army in South Korea.
Eight Army , Yongsan Garrison, South Korea [20] 
2nd Infantry Division , Camp Casey [20] 
17th Aviation Brigade, Camp Coiner [20] [21] [22] 
1st Signal Brigade, Camp Humphreys [25] 
8th Military Police Brigade (Provisional), Camp Coiner [20] 
501st Military Intelligence Brigade (Provisional), Yongsan Garrison [32] 
18th Medical Command, Seoul [20] [22] (the following peacetime listing is incomplete) 
19th Support Command, Daegu [20] (the following peacetime listing is incomplete) 
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 denied areas with a U.S. Department of Defense requirement to "respond to crisis contingencies anywhere in the world within 18 hours". 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 2nd Infantry Division ("Indianhead") is a formation of the United States Army. Its current primary mission is the pre-emptive defense of South Korea in the event of an invasion from North Korea. There are approximately 17,000 soldiers in the 2nd Infantry Division, with 10,000 of them stationed in South Korea, accounting for about 35% of the United States Forces Korea personnel.
The XVIII Airborne Corps is a corps of the United States Army that has been in existence since 1942 and saw extensive service during World War II. The corps is designed for rapid deployment anywhere in the world and is referred to as "America's Contingency Corps." Its headquarters are at Fort Liberty, North Carolina.
The 1st Cavalry Division is a combined arms division and is one of the most decorated combat divisions of the United States Army. It is based at Fort Cavazos, Texas. It was formed in 1921 and served during World War II, the Korean War, the Vietnam War, the Persian Gulf War, with the Stabilization Force in Bosnia-Herzegovina, in the Iraq War, in the War in Afghanistan as well as Operation Freedom's Sentinel and Operation Inherent Resolve. As of July 2023, the 1st Cavalry Division is subordinate to III Armored Corps and is commanded by Major General Kevin D. Admiral.
The 49th Armored Division —nicknamed the "Lone Star"— was an armored division of the Texas Army National Guard during the Cold War.
The 10th Mountain Division (Light Infantry) is a light infantry division in the United States Army based at Fort Drum, New York. Formerly designated as a mountain warfare unit, the division was the only one of its size in the US military to receive specialized training for fighting in mountainous conditions. More recently, the 10th Mountain has been conducting operations in Iraq and Syria advising and assisting Iraqi Security Forces and People's Defense Units.
The 25th Infantry Division is a United States Army division based at Schofield Barracks in Hawaii. The division, which was activated on 1 October 1941 in Hawaii, conducts military operations primarily in the Asia-Pacific region. Its present deployment is composed of light infantry and aviation units. Tropic Lightning soldiers regularly train with other U.S. military branches to practice and maintain joint operations capabilities. The climate and terrain of the Pacific region demands Tropic Lightning soldiers be able to operate in physically demanding and harsh environments. In 2014, the division opened the Jungle Operations Training Center—the first such school in the Army since the closing of the old Jungle Warfare School at Fort Sherman, Panama Canal Zone. Joint operations and training with partner states herald a new chapter in the history of Tropic Lightning—America's Pacific Division.
The Eighth Army is a U.S. field army which commands all United States Army forces in South Korea. It is headquartered at the Camp Humphreys in the Anjeong-ri of Pyeongtaek, South Korea. Eighth Army relocated its headquarters from Yongsan to Camp Humphreys in the summer of 2017. It is the only field army in the U.S. Army. It is responsible to United States Forces Korea and United States Army Pacific.
The 29th Infantry Division, also known as the "Blue and Gray Division", is an infantry division of the United States Army based in Fort Belvoir, Virginia. It is currently a formation of the U.S. Army National Guard and contains units from Virginia, Maryland, Kentucky, North Carolina, South Carolina and West Virginia.
The 9th Infantry Division is an inactive infantry division of the United States Army. It was created as the 9th Division during World War I, but never deployed overseas. In later years it was an important unit of the U.S. Army during World War II and the Vietnam War. It was also activated as a peacetime readiness unit from 1947 to 1962 at Fort Dix, New Jersey, and Fort Carson, Colorado, and from 1972 to 1991 as an active-duty infantry division at Fort Lewis, Washington. The division was deactivated in December 1991.
The 6th Infantry Division was an infantry division of the United States Army active in World War I, World War II, and the last years of the Cold War. Known as "Red Star", it was previously called the "Sight Seein' Sixth".
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 Oregon Army National Guard is a federally mandated and equipped military organization under the civilian direction of the Oregon Military Department, with the Governor of Oregon as its Commander-in-Chief. It responds to state and national emergencies, military conflicts and natural disasters, and conducts search and rescue operations. While the history of the militia dates back to the establishment of the first Oregon militia in 1843, the present Guard was not established until after 1903. The modern Guard includes citizen soldiers, and its motto is "When we are needed, we are there."
The Oklahoma Army National Guard is the Army National Guard component of the Oklahoma National Guard. The Commander in Chief of the Oklahoma National Guard is the Governor of Oklahoma, who appoints the State Adjutant General (TAG), a Major General from either Army or Air. Currently, the TAG is Brig. Gen. Thomas H. Mancino. The previous TAG was Maj. Gen. Michael Thompson.
The 11th Infantry Brigade is an inactive infantry brigade of the United States Army. It was first formed as part of the 6th Division during World War I. It is best known for its service with the 23rd Infantry Division from 1967 through 1971 in the Vietnam War as a light infantry brigade. The brigade is known for its responsibility in the My Lai Massacre.
The 46th Infantry Division was a formation of the Michigan Army National Guard active between 1947 and 1968. It was initially headquartered at Lansing. Many of its units had previously been part of the 32nd Infantry Division. It was converted to the Reorganization Objective Army Division (ROAD) structure in March 1963. The Division's 2nd Brigade was assigned to the Selected Reserve Force, a higher-readiness component of the ARNG, in 1965. Virtually the entire division was involved in responding to the 12th Street riot in Detroit in July–August 1967.
The 39th Infantry Division was an infantry formation of the Army National Guard, originally formed as the 18th Division in 1917. The division consisted of troops from Arkansas, Louisiana, and Mississippi. After training at Camp Beauregard, Louisiana, the division was deployed to France but did not see combat before the end of World War I. In July 1923 the division was re-designated as the 31st Infantry Division. The 39th Infantry Division was reactivated after World War II with troops from Louisiana and Arkansas and its headquarters in Louisiana. In 1967, the 39th Infantry Division was reorganized to become the 39th Infantry Brigade (Separate). Its headquarters was in Little Rock and the unit consisted entirely of troops from Arkansas.
The 169th Field Artillery Brigade is an artillery brigade in the US Army National Guard. It is part of the Colorado Army National Guard.
The history of the Arkansas Army National Guard and the Cold War involves several statewide re-organizations that occurred as a result of the evolving structure of United States Army Divisions and Brigades. In 1959 the state re-organized and restationed units in response to the Army's adoption of the Pentomic Division, the structure which was designed to counter the Soviet threat in eastern Europe. Several Arkansas National Guard units were mobilized in 1960 as part of the Berlin Crisis. In 1963 the state reorganized again as the administration of President John F. Kennedy focused on "Flexible Response" and divisions reorganized to meet the challenged of numerous small wars such as the war in Vietnam. In 1967 the 39th Infantry Division was reorganized as the 39th Infantry Brigade (Separate) as a result of a plan to reduce the total number of National Guard Divisions nationwide. The state would eventually gain a new headquarters, the State Area Command in order to provide a higher headquarters for several units which were not assigned to either the 142nd Field Artillery Brigade or the 39th Infantry Brigade (Separate).