64th Infantry Regiment (United States)

64th Infantry Regiment (United States)
Unit name	64th Infantry Regiment
Caption	Distinctive unit insignia
Dates	1917–1946
Country	United States
Branch	United States Army
Type	Infantry
Role	Infantry
Size	Regiment
Command structure	United States Army Infantry Branch
Battles	World War II, New Guinea campaign (World War II), Philippine campaign (1944–45)
Notable commanders	Frederick M. Pearson, Charles W. Ryder

64th Infantry Regiment (United States) was an infantry regiment of the United States Army active during the early 20th century and through World War II. Raised during periods of mobilization, the regiment served in the Pacific War, participating in campaigns in New Guinea and the Philippines. The unit underwent several reorganizations and reassignments before being inactivated after the war; its personnel and lineage intersected with other formations such as the 25th Infantry Division and the 32nd Infantry Division.

History

The regiment's history is rooted in American mobilizations for international conflict. Initially constituted amid the expansion of the United States Army in the First World War era, the regiment later reconstituted and trained under the auspices of the War Department (United States) and the Army Ground Forces prior to American entry into World War II. During the Pacific theater, it operated under higher echelons including theater commands led by figures connected to the South West Pacific Area and the United States Army Forces, Pacific.

Formation and Organization

The 64th Infantry Regiment was constituted and organized in response to wartime personnel needs, drawing companies from depots and training centers such as Fort Benning, Camp Shelby, and Fort Lewis (Washington). Its regimental structure mirrored standard infantry organization of the period with three battalions, headquarters elements, and organic support companies influenced by doctrine promulgated at institutions like the United States Army Infantry School and the Army War College. Officers and non-commissioned officers were commissioned and promoted through systems associated with Officer Candidate School (United States Army), Reserve Officers' Training Corps, and branch transfers from units such as the Regular Army and the Army Reserve (United States). Administrative control shifted between commands including the Army Service Forces and the Eighth United States Army during deployments.

World War II Service

During World War II, the 64th Infantry Regiment was deployed to the Pacific, participating in operations in New Guinea campaign (World War II) and later the liberation of the Philippine Islands. The regiment conducted amphibious assaults and jungle warfare operations coordinated with naval forces of the United States Navy, air support from the United States Army Air Forces, and allied contingents such as the Royal Australian Army. Engagements involved fighting on terrain similar to actions at Aitape, Hollandia, and portions of the Leyte campaign. Logistics and medical evacuation were handled in coordination with the United States Army Services of Supply and the United States Army Medical Corps. Command relationships placed the regiment under corps-level formations that at times included units from the Eighth United States Army, XIV Corps (United States), or task forces assembled for specific amphibious operations.

Postwar Activities and Reassignments

Following victory over Empire of Japan and the cessation of hostilities, the 64th Infantry Regiment participated in occupation duties, demobilization, and the return of troops to the United States. Its remaining elements were subject to the widespread postwar reductions directed by senior leaders such as George C. Marshall and administrative bodies including the War Department (United States). Soldiers were transferred to divisions undergoing reorganization, including the 25th Infantry Division and elements absorbed into other regiments through lineage actions administered by the United States Army Center of Military History. By the late 1940s the regiment's active elements had been inactivated or redesignated as the postwar Army reorganized for Cold War commitments under policies emerging from the National Security Act of 1947.

Insignia and Traditions

The regiment's distinctive unit insignia and colors reflected heraldic motifs common to infantry regiments, incorporating symbols referencing Pacific service and American martial heritage drawn from traditions maintained by the Institute of Heraldry (United States). Marches and regimental songs were performed in concert with United States Army Band elements, and unit customs aligned with practices at training centers such as Fort Benning and garrison ceremonies observed at posts including Fort Ord. Battle streamers awarded for campaigns in World War II were affixed to regimental colors in ceremonies presided over by commanding officers and representatives from the Secretary of War's office.

Notable Personnel and Commanders

The regiment's roster included officers and enlisted personnel who had prior associations with prominent formations and figures. Commanders and staff who served with the regiment before, during, or after wartime service maintained connections to leaders such as Douglas MacArthur, Douglas E. Markets (staff planners), and senior divisional commanders from the United States Army Pacific. Some officers later advanced to assignments in institutions like the National War College and the Pentagon, while enlisted veterans joined veteran organizations such as the American Legion and the Veterans of Foreign Wars.

Legacy and Disbandment

The 64th Infantry Regiment's lineage and honors contributed to the institutional memory preserved by the United States Army Center of Military History and commemorated in unit histories, museum collections, and veteran reunions organized by regional chapters of the American Legion and the Veterans of Foreign Wars. Although inactivated and its elements redistributed in the postwar reductions, its campaign credits for New Guinea campaign (World War II) and the Philippine campaign (1944–45) remain part of the archival record maintained by repositories such as the National Archives and military museums at posts like Fort Lewis (Washington). Its dissolution reflected the broader reorganization of the American ground forces transitioning into the Cold War era overseen by institutions including the Department of Defense.

Category:Infantry regiments of the United States Army Category:Military units and formations established in 1917 Category:Military units and formations disestablished in 1946