entered the First World War on the side of the Entente Powers in April 1917, without any tanks of its own. Light tanks with a crew of only two were mass-produced during World War I. World War I Renault FT tanks being operated by the US Army in France. has been greatly influential in the design philosophy, production and doctrine of tanks, and has been responsible for some of the most successful tank designs.

In World War II, the US came to the fore with tanks designed for mass production and reliability reflecting the US position as the 'arsenal of democracy'. In the interwar period there was reduced development due to the low expenditure on war material following the US non-interventionist policy and the financial position. While there were several American experiments in tank design, the first American tanks to see service were copies of French light tanks and a joint heavy tank design with the United Kingdom. The United States has produced tanks since their inception in World War I, up until the present day.

L full size military tanks