National Army (United States)

National Army (United States)
Unit name	National Army
Country	United States
Branch	United States Army
Type	Army
Dates	1917–1920
Notable commanders	John J. Pershing, Hunter Liggett, Robert Lee Bullard

National Army (United States) was the designation for the volunteer and conscript force raised by the United States to fight in World War I following the declaration of war against the German Empire in 1917. Constituted to supplement the Regular Army and the National Guard, the National Army combined draftees under the Selective Service Act of 1917 with voluntary formations to provide expeditionary corps for the American Expeditionary Forces. The creation and administration of the National Army involved key figures such as Woodrow Wilson, Newton D. Baker, and John J. Pershing, and it reshaped United States military policy in the interwar period.

Origins and Formation

The National Army emerged after United States entry into World War I when President Woodrow Wilson and Secretary of War Newton D. Baker sought a rapid expansion beyond the Regular Army (United States). Following congressional passage of the Selective Service Act of 1917, enrollment drives, oversight by the Provost Marshal General of the Army, and coordination with the Council of National Defense produced mobilization plans that integrated the National Guard (United States) and new draftees. The recruitment system intersected with policies promulgated by the War Department (United States) and operational commands under General John J. Pershing, who insisted on an independent American Expeditionary Forces rather than amalgamation into British Expeditionary Force or French Army units. Debates in United States Congress and among military leaders such as Hunter Liggett and Earl H. Ellis shaped divisional organization and the creation of numbered divisions bearing lineage with states and civic organizations.

Organization and Structure

The National Army was organized into numbered divisions, corps, and field armies under the command structure of the American Expeditionary Forces. Divisions such as the 1st Division, 2nd Division, 42nd "Rainbow" Division, 79th Division, and 82nd Division were constituted from mixtures of Regular, Guard, and draftee personnel. Corps headquarters like I Corps and IV Corps coordinated operations with armies including the First United States Army and Second United States Army. Staff systems adapted Allied model practices; logistics and supply were managed by the Quartermaster Corps, medical services by the Medical Department, and aviation assets coordinated with the United States Army Air Service. Administrative law and command relationships touched on institutions such as the War Department General Staff and legal authorities exemplified by the Judge Advocate General's Corps.

Recruitment, Training, and Demobilization

Recruitment relied on the Selective Service Act of 1917 and voluntary enlistments influenced by patriotic campaigns led by entities like the Committee on Public Information and civic groups including the American Legion. Training camps such as Camp Funston, Camp Dix, Camp Lewis, and Camp Sherman hosted basic and specialized instruction administered by officers from the Regular Army (United States), veterans of the Spanish–American War, and staff trained at institutions like the United States Military Academy and the Command and General Staff College. Specialized schools—artillery at the Field Artillery School (United States), engineer training at the United States Army Corps of Engineers, and aviation instruction at the Rockwell Field—prepared draftees for front-line roles. Demobilization after the Armistice of 11 November 1918 involved the General Demobilization Plans of the War Department and the management of returning soldiers by agencies such as the Veterans Bureau and the emergent American Legion, with challenges including reintegration, employment, and the 1918–1919 Spanish flu pandemic.

Role in World War I

Units of the National Army participated in major operations on the Western Front, contributing to offensives like the Saint-Mihiel Offensive, the Meuse-Argonne Offensive, and operations in the Champagne sector. Commands under John J. Pershing, with corps led by commanders such as Hunter Liggett and Robert Lee Bullard, coordinated with Allied formations including the British Expeditionary Force and the French Army. National Army divisions distinguished themselves in battles at Cantigny, Belleau Wood, and the breaking of the Hindenburg Line; infantry, artillery, and engineer units adapted to combined-arms tactics developed across the Western Front. Engagements involved cooperation with allied air services such as the Royal Flying Corps and the French Aéronautique Militaire, and logistics drawn from transatlantic convoys supervised alongside the United States Shipping Board and the Naval Overseas Transportation Service.

Equipment and Uniforms

National Army units used materiel that blended domestic and Allied procurement: small arms like the M1903 Springfield rifle and the M1911 pistol, machine guns such as the Browning M1917 machine gun, and artillery pieces including the M1917 155 mm gun (a US-produced version of French designs). Vehicles such as Liberty trucks, tanks like the Mark V received in limited numbers, and aircraft including the SPAD S.VII and Nieuport 28 equipped pursuit squadrons. Uniforms combined the United States Army uniform models 1917–1918 with insignia and divisional patches; equipment included the M1910 haversack, Brooks helmet variants, and web gear standardized by the Quartermaster Corps. Medical and chemical defense elements referred to items employed by the United States Army Chemical Corps (historical precursor) and medical protocols from the American Red Cross.

Legacy and Impact on U.S. Military Policy

The National Army's mobilization and wartime experience influenced postwar debates that produced the National Defense Act of 1920 and reforms to the United States Army Reserve. Veterans' organizations like the American Legion lobbied for benefits, culminating in institutions such as the Veterans Bureau and shaping policies under administrations of Warren G. Harding and Calvin Coolidge. Lessons in conscription, force structure, combined-arms doctrine, and civil-military relations affected later planning in the Interwar period, the development of the Selective Training and Service Act of 1940, and organizational evolutions leading into World War II. The National Army left a legacy in divisional lineages, tactical doctrine codified in Army publications, and the wider social impact of mass mobilization on American society and national institutions.

Category:United States Army