11th Infantry Brigade (United States)

11th Infantry Brigade (United States)
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Unit name	11th Infantry Brigade
Dates	1917–1919; 1941–1945; 1966–1971
Country	United States
Branch	United States Army
Type	Infantry
Size	Brigade
Battles	World War I, World War II, Vietnam War

11th Infantry Brigade (United States) is a former United States Army infantry brigade with a history spanning three major conflicts of the 20th century. First constituted for service in World War I, it was later reactivated during World War II and most notably served as a separate brigade during the Vietnam War. The brigade's service included significant combat operations in the Pacific Theater of Operations and the intense counterinsurgency environment of South Vietnam.

History

The 11th Infantry Brigade was originally constituted in the National Army on 5 July 1917, shortly after the American entry into World War I. It was assigned to the 6th Infantry Division and deployed to France, where it participated in the final campaigns of the war on the Western Front, including the Meuse-Argonne Offensive. The brigade was inactivated in 1919 following the Armistice of 11 November 1918. It was reactivated in 1941 at Fort Leonard Wood as part of the military expansion preceding American entry into World War II, again assigned to the 6th Infantry Division. Its most distinct period began in 1966 when it was activated as a separate light infantry brigade at Schofield Barracks in Hawaii for deployment to the Vietnam War, where it operated independently, not as part of a parent division.

Organization

During World War I and World War II, the brigade's core structure under the 6th Infantry Division typically included the 51st and 52nd Infantry Regiments. For its Vietnam War deployment, the 11th Infantry Brigade was organized as a separate brigade with three infantry battalions: the 3rd Battalion, 1st Infantry Regiment; the 4th Battalion, 3rd Infantry Regiment; and the 1st Battalion, 20th Infantry Regiment. The brigade also contained an artillery battalion, the 6th Battalion, 11th Artillery Regiment, along with support units including engineers, signal, medical, and military police companies.

Commanders

Notable commanders of the brigade include Brigadier General John W. Donaldson, who led the brigade during its initial deployment to Vietnam in 1966. He was succeeded by Brigadier General James S. Timothy, who commanded during a period of intense operations. Later commanders included Brigadier General Leo H. Schweiter and Brigadier General John L. T. Jones, who oversaw the brigade's final operations and its withdrawal from Southeast Asia.

Campaigns and operations

In World War I, the brigade fought in the Champagne-Marne, Aisne-Marne, St. Mihiel, and Meuse-Argonne campaigns. During World War II, as part of the 6th Infantry Division, it engaged in the New Guinea campaign and the pivotal Battle of Luzon in the Philippines. In the Vietnam War, the 11th Infantry Brigade was assigned to Americal Division operational control and conducted extensive operations in Quảng Ngãi and Quảng Tín Provinces within I Corps Tactical Zone. Its area of operations included the infamously contested regions around Chu Lai and the Song Ve River, and it was involved in the aftermath of the Mỹ Lai massacre.

Decorations and honors

The brigade and its subordinate units earned multiple awards for wartime service. It received campaign participation credit for World War I, World War II, and the Vietnam War. Individual battalions within the brigade were awarded the Valorous Unit Award for actions in Vietnam, such as the Battle of Lo Giang. Soldiers of the brigade received numerous individual decorations, including the Medal of Honor, Distinguished Service Cross, and Silver Star for gallantry in combat across its various deployments.

Legacy and lineage

The 11th Infantry Brigade was inactivated in South Vietnam in 1971 as part of the Vietnamization withdrawal process. Its lineage and honors are currently perpetuated by the 1st Battalion, 6th Infantry Regiment, which carries forward the history of several regiments once assigned to the brigade. The brigade's service, particularly in Vietnam, remains a subject of historical study regarding the structure of separate brigades and counterinsurgency warfare. The actions of its units, including the tragic events at Mỹ Lai, have had a lasting impact on United States military doctrine and ethics training. Category:Infantry brigades of the United States Army Category:Military units and formations of the United States in the Vietnam War