The 31st Field Artillery Regiment is a field artillery regiment of the United States Army, first Constituted in 1918 in the National Army (USA). The 1st Battalion, 31st Field Artillery, was constituted 5 July 1918 in the National Army as the 31st Field Artillery and assigned to the 11th Division. The "Proud American" Battalion was organized at Camp George G. Meade, Maryland 6 August 1918 but relieved thereafter from its assignment to the 11th Division on 30 September 1918. The unit demobilized 9 December 1918 at Camp George G. Meade, Maryland.On 22 July 1929, 31st FA was reconstituted in the Regular Army and assigned to the 2nd Division but was, once again, later relieved on 1 January 1930 from its assignment to the 2nd Division.The "Proud American" Battalion was subsequently assigned to t