M1917 tank

M1917 tank The M1917 tank was the first mass-produced United States armored fighting vehicle, adapted from the British Mark IV tank design and delivered to the American Expeditionary Forces during the closing months of World War I. Intended to remedy American shortages of indigenous armored vehicles, the M1917 was produced in large numbers through conversion programs run by industrial firms like Bethlehem Steel and American Locomotive Company for use by organizations such as the United States Army and the United States Marine Corps. Although it saw no major action in World War I combat, the vehicle influenced interwar armored doctrine within the Tank Corps (United States Army) and contributed to early American vehicle development programs including the M1919 tank experiments.

Development and Design

Development began after representatives from the Tank Corps (United States Army) inspected captured and Allied tanks like the Mark V tank and the Whippet (tank), prompting acquisition of license details and captured examples from sources including British Army contacts and the American Expeditionary Forces. With guidance from figures such as General John J. Pershing and officers in the United States Tank Corps, Bethlehem Steel negotiated conversion contracts with industrialists including Charles M. Schwab and coordination with the Ordnance Department (United States Army). The design retained the riveted rhomboid hull form, sponson placements and track arrangement of the Mark IV tank while incorporating American components such as the Liberty L-8 engine and U.S. standardized armaments like the 37 mm M1916 gun and the Browning M1917 machine gun. Armor and weight were adjusted to suit domestic production capabilities at plants familiar with rolling stock, drawing on engineering experience from firms like American Locomotive Company and corporate networks tied to Bethlehem Steel suppliers.

Variants and Modifications

Early conversions produced the standard M1917, but field and factory modifications led to multiple informal variants noted by Tank Corps reports, ordnance trials and industrial records. Some vehicles received upgraded powerplants—experiments employing higher-output Liberty engine tuning and alternative transmissions influenced by Allison Engineering Company design thinking—while others were fitted with different armament layouts substituting additional .30-06 Springfield-chambered machine guns for the original sponsons in response to proposals from officers in the 42nd Infantry Division and 3rd Division. Engineering bureaus at Aberdeen Proving Ground and testing detachments linked to the Rock Island Arsenal trialed suspension tweaks, crew compartment reconfigurations inspired by lessons from the Battle of Cambrai and proposals circulated by staff from the Office of the Chief of Ordnance. Armored recovery and training conversions were made for use by the Tank School (Fort Meade) and units associated with the National Defense Act of 1920 implementation.

Production and Service History

Production hinged on conversion of surplus British-pattern hulls and domestic fabrication at plants operated by contractors such as Bethlehem Steel, American Locomotive Company, and subcontractors drawing on labor pools organized under management figures like James M. Gavin-era industrial leaders. Contracts authorized by the War Department (United States) converted roughly 950 chassis components into M1917s between 1918 and 1920; deliveries continued into the postwar period for training and garrison duties assigned by the United States Army Ground Forces successor establishments. Units equipped with the M1917 included Tank Corps formations that later formed the nucleus of interwar organizations such as the 1st Provisional Tank Brigade, while some vehicles were loaned to the United States Marine Corps for amphibious and expeditionary experiments influenced by officers later associated with the Guadalcanal Campaign leadership. By the late 1920s many M1917s were relegated to training roles at installations like Fort Meade and Camp Benning until phased out under peacetime budgets overseen by the Secretary of War.

Combat Use and Operational Assessment

The M1917 did not participate in major World War I offensive operations due to delivery timing and logistics, though it was evaluated in stateside maneuvers and interwar exercises that informed doctrine promulgated by the Chief of Staff of the United States Army and the Infantry School (Fort Benning). Operational assessments highlighted features inherited from the Mark IV tank—notably cross-country mobility and trench-crossing ability—while criticizing limitations such as underpowered engines, low power-to-weight ratio and vulnerability of riveted armor, concerns echoed in analyses by the Ordnance Department and observers like officers from the British Tank Corps. Tactical reports from training units emphasized crew ergonomics problems, maintenance burdens familiar to personnel drawn from the Quartermaster Corps and logistical challenges tied to spare parts supply chains linking back to manufacturers like Bethlehem Steel and American Locomotive Company.

Survivors and Legacy

A small number of M1917 vehicles survived into preservation, often acquired by museums, historic collections and institutions such as the Smithsonian Institution and regional military museums associated with the National Museum of the United States Army precursor organizations. Surviving hulls and components informed restoration efforts and scholarly work by historians connected to archives at the U.S. Army Center of Military History and curatorial staff from the National Archives and Records Administration. The M1917's legacy influenced later American armor projects including the M2 Medium Tank and doctrinal developments leading to vehicles like the M4 Sherman, and its production highlighted industrial mobilization patterns that shaped interwar procurement overseen by entities such as the War Plans Division and the General Staff.

Category:Tanks of the United States