U.S. XXIV Corps

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XXIV Corps (24th Corps) was a U.S. Army Corps-level command during World War II and the Vietnam War.

XXIV Corps was activated at Fort Shafter, Hawaii, on April 8, 1944. It participated in the invasion of Leyte in the Philippine Islands on October 20, 1944, with the 7th Infantry Division and 96th Infantry Division its major combat units. During the campaign on Leyte, the 77th Infantry Division came under control of XXIV Corps.

From April 1 to June 30, 1945, XXIV Corps and its divisions participated in the invasion of Okinawa. In September 1945, after the surrender of Japan, XXIV Corps moved to Korea, where it remained on occupation duty until its deactivation on January 25, 1949.

XXIV Corps was re-activated on August 15, 1968, at Fort Hood, Texas, to replace the "Provisional Corps Vietnam," a temporary headquarters created March 10, 1968 during the Tet Offensive. Upon its arrival in Vietnam, XXIV Corps was placed under the operational control of the III Marine Amphibious Force to control the activities of U.S. Army ground combat units deployed in northern South Vietnam and had its headquarters at Phu Bai until March 9, 1970, when it relocated to Danang. At that time it assumed control of all U.S. ground forces in I CTZ, with all remaining Marine units coming under its operational control until their withdrawal. During its service in Vietnam XXIV Corps was a component command of U.S. Military Assistance Command Vietnam (MACV).

XXIV Corps area of responsibility was I Corps Tactical Zone ("Eye Corps"), later renamed Military Region 1, which comprised the five northernmost provinces of the South Vietnam. Among the divisions and brigades it controlled were:

• 1st Cavalry Division (Airmobile)
• 23d Infantry Division (Americal)
• 101st Airborne Division
• 1st Brigade, 5th Infantry Division
• 3d Brigade, 82nd Airborne Division
• 173rd Airborne Brigade
• 196th Light Infantry Brigade
• 108th Artillery Group
• III Marine Amphibious Force
• 3rd Marine Amphibious Brigade
• Task Force Clearwater (U.S. Navy)

XXIV Corps was deactivated on June 30, 1972 in the final stages the withdrawal of U.S. ground combat forces from Vietnam, and its assets formed the basis for its successor, the First Regional Assistance Command (FRAC).

Source: Stanton, Shelby, Vietnam Order of Battle, ISBN 0-89193-700-5