As part of U.S. mobilization, 3-320th was constituted, organized and activated in August 1917 as Battery C, 320th Field Artillery (C/320th FA).

As part of the original 82nd Division, C/320th FA played a key role at Lorraine, St. Mihiel, and the Meuse Argonne region in France.

Following the Armistice, the 320th FA demobilized, only to be reconstituted in June 1921 as part of the United States Organized Reserves.

The 320th GFAB next fought in Operation Market Garden and then the Battle of the Bulge when the Germans attempted their last-ditch offensive.

Upon the war's end the unit completed its duties in Europe as part of the post-war occupation in Berlin.

As part of the transition to the U.S. Army Regimental System in 1986, the 3-320th was activated in the 101st Airborne Division at Fort Campbell, Kentucky, by reflagging the 3-319th.

Note: The published Army lineage, dated 18 September 1996, shows no campaigns for the War on Terrorism.