The 1st Battalion, 320th Field Artillery Regiment is a U.S. Army field artillery battalion consisting of 3 firing batteries of six M119 105mm Howitzers each and is currently assigned and directly supports the 2D BCT of the 101st Airborne Division (Air Assault).

Battery E, 320th Field Artellery, was constituted on 15 August 1917 as a element of the 82nd Dividion. In WW I, it participated in the campaigns of St. Mihiel, Meuse-Argonne and Lorraine. Adsorbed by Battery B, 320th Field Artellery Battalion on 30 January 1942, and soon thereafter redesignated Battery B, 320th Glider Field Artellery Battalion. The 82nd Division was designated Airborne on 15 August 1942. In participated throughout WW II in campaigns at Sicily, Naples-Foggia, Normandy, Rhinland, Ardennes-Alsace and Central Europe. Its many decorations include the Presidential Unit Citation (Ste Mere Eglise), French Croix de Guerre with Palm (Ste Mere Englise and Contentin) and the military order of William Degree of the Night of the fourth Class (Nijmegen).
Former Battery E, 320th Field Artellery, was reconstituted on 22 March 1957 in the regular Army, and on 2 October 1986, absorbet Battery C, 94th Field Artellery upon its reactivation and assignment as a element of the Berlin Brigade. Battery E´s parent Regiment is the 320th Division Artellery, 101st Airborne Division.