77th Infantry Division

77th Infantry Division
Unit name	77th Infantry Division
Caption	Shoulder sleeve insignia
Dates	1917–1919; 1921–1945; 1946–1967
Country	United States
Branch	United States Army
Type	Infantry
Size	Division
Notable commanders	See section

77th Infantry Division The 77th Infantry Division was a unit of the United States Army activated for major 20th century conflicts, mobilized for World War I, reconstituted during the Interwar Period, deployed in World War II, and retained through the early Cold War. The division trained at Camp Upton, fought on the Western Front in 1918, later converted and reorganized between wars, and returned to combat in the Pacific War where it participated in amphibious operations across the Philippine Islands and Okinawa Campaign. Its lineage ties to New York City civic organizations, veteran groups, and multiple memorials persist in archives, museums, and monuments.

Formation and Organization

Constituted in the National Army (United States) in 1917 and organized at Camp Upton on Long Island, the division drew draftees and recruits from New York City, New Jersey, Connecticut, and surrounding states, aligning with mobilization plans devised by the United States War Department and implemented by commanders at General Headquarters (France). Initial order of battle followed the 1917 triangular and square division concepts promulgated by the Chief of Staff of the United States Army, integrating infantry regiments, artillery brigades, engineer battalions, signal companies, medical detachments, and machine gun battalions as directed by doctrine influenced by lessons from the Battle of the Somme and Second Battle of the Marne.

Service in World War I

After training at Camp Upton and embarkation from the Port of New York, the division arrived in France under the control of the American Expeditionary Forces led by John J. Pershing and was assigned sectors in the Champagne-Marne region. Elements participated in the Oise-Aisne Offensive and the Meuse-Argonne Offensive, coordinating with units of the British Expeditionary Force and the French Army while confronting German forces from the German Empire. The division employed creeping barrages with artillery from Corps artillery and integrated liaison with Royal Air Force reconnaissance, suffering casualties during assaults on fortified positions and contributing to the Allied advance that culminated in the Armistice of 11 November 1918.

Interwar Period and Reconstitution

Demobilized after the World War I armistice and inactivated in 1919, the division was reconstituted in the Organized Reserve in 1921 with headquarters elements tied to New York City civic institutions and Army Reserve training centers. During the Great Depression the division’s cadre maintained readiness through summer camps at Fort Devens and Camp Dix, coordinated with the Office of the Chief of Infantry and participated in rotating training with Regular Army units such as the 1st Infantry Division and 2nd Infantry Division. Reorganization under the National Defense Act of 1920 and later regulations reshaped regimental and support structures ahead of mobilization for World War II.

World War II Operations

Ordered into active service in 1942, the division trained at Camp McCain and conducted amphibious training with units from the United States Navy and United States Marine Corps prior to deployment to the Pacific Theater of Operations. Assigned to campaigns in the Solomon Islands chain and later to liberation operations in the Philippines, the division executed assaults on fortified islands, coordinated naval gunfire support from Task Force elements, and linked operations with the Eighth United States Army and Sixth United States Army commands. In late campaigns the division participated in operations supporting the recapture of strategic positions, engaging Japanese Imperial Army units during protracted jungle and urban combat, and conducting mopping-up and occupation duties until the Surrender of Japan.

Postwar Service and Cold War Era

Following World War II the division underwent demobilization, reorganization as a reserve formation, and periods of activation during early Cold War contingencies. Its lineage was maintained through reserve training activities coordinated with the United States Army Reserve and legacy associations preserved regimental histories in archives at the National Archives and Records Administration. During the 1950s and 1960s the division’s heritage influenced training doctrine at installations such as Fort Benning and participation in civil support exercises alongside federal agencies influenced by strategic guidance from the Department of Defense.

Unit Composition and Notable Commanders

Standard wartime composition included infantry regiments, field artillery battalions, an engineer combat battalion, a reconnaissance troop, a signal company, medical battalion, and logistical support units, organized per tables of organization and equipment issued by the War Department and later Department of the Army. Commanders who led the division or major formations included officers with prior service in World War I, Interwar assignments, and World War II campaigns; commanding generals rotated per theater requirements and included leaders who had previously served at West Point or in staff roles with Army Ground Forces and Services of Supply.

Legacy, Honors, and Memorials

Veteran associations of former personnel established chapters in New York City and held reunions alongside commemorations at monuments near Camp Upton and civic memorials in Manhattan and Queens. Unit awards, campaign streamers, and citations from the Army Distinguished Unit Citation era are preserved in regimental colors displayed in museums such as the National Museum of the United States Army and regional military history collections. Scholarly works in military history libraries, oral history collections at the Library of Congress, and monuments at national cemeteries memorialize the division’s service alongside lists of battle honors recorded in official annals of the United States Army Center of Military History.

Category:Infantry divisions of the United States Army