World War I Initially formed at
Camp Gordon, Georgia, the 320th was part of the
82nd Division's 157th Field Artillery Brigade. On 5 September 1917, a small cadre of Regular Army non-commissioned officers and privates joined officer cadres that had reported on 29 August 1917 after graduating from the three batteries of the 7th Provisional Training Regiment. Draftees from Georgia, Alabama and Tennessee arrived over the next few weeks, but many of these men were transferred in November and replaced by new draftees from Texas, Oklahoma, Iowa and Minnesota and all the states east of the Mississippi River. Initially, the 320th's six firing batteries shared a single battery of 3-inch guns for training with the other 12 batteries in the brigade. In addition to approximately 10 hours use of the actual guns, the regiment's gun squads conducted training with replicas "crudely made structures fashioned from the trunks of small trees, tin cans, spools, gas pipes and any available material." A second battery of guns arrived in December, and from December 1917 through May 1918, the regiment conducted firing practice at Blackjack Mountain near Marietta, Georgia. Beginning 8 May 1918, the regiment moved by train to Camp Mills, New York, and then shipped to Liverpool, England on the ship
City of Exeter, arriving on 31 May 1918. After a brief stop, the regiment crossed the English Channel from Southampton to Le Havre, France and then moved by train to La Courtine. There, the 320th was fully equipped with 75mm guns and conducted two months of training, culminating in a brigade live fire. From 5–10 August, the 320th moved into a reserve position behind Chateau Thierry, but was not employed and moved by train to Toul and then occupied defensive positions in the Marbache sector with the 157th/82nd. On 22 August, Battery F fired the brigade's first 75mm rounds against Norroy. In preparation for the
St. Mihiel Offensive, the regiment moved into forward gun positions constructed with the assistance of the division's infantry. Beginning at 0100hrs on 12 September 1918, the 320th participated in a four-hour preparation, consisting of counter-battery fires on 16 German batteries and other positions. After the offensive started, the regiment also fired on "fugitive targets". On 13 September, the 320th and its sister 321st Field Artillery fired 10000 rounds in support of a raid by the 327th Infantry in the Bois Frehaut. The result of the St. Mihiel operation was "the establishment of confidence, born of performance" throughout the 157th Brigade. After relief on 20 September and assembling near Marbache, the 320th spent the nights of 22–25 September moving to Beauzee, arriving on the morning of 26 September. On 26 September, the regiment moved to bivouac's near Futeau in the Argonne Forest, remaining there until 5 October. At 1300 hours on 5 October 1918, the 157th received orders for an attack at 0500 hours the next morning. The advanced party established a regimental command post at Chaudron Farm, with the 321st Field Artillery's command post. Poor roads and miscommunications delayed the movement of the regiment's main body, and the first battery began firing at 0540 hours, 40 minutes after H-hour and the regiment missed the first planned phase of its plan. After the truncated preparation, the regiment fired in support of the infantry throughout the day. At 1800 hours, the 2nd Battalion joined the
321st Field Artillery in repelling a German counterattack against the 164th Infantry Brigade. Defensive and harassing fire continued through the night of 6–7 October. 7 October was spent in establishing observation posts and telephone communications in the new positions. On the morning of 8 October, 2/320th again joined the 321st Field Artillery in firing a rolling barrage for the infantry, while the 1/320th and the French 219th artillery fired a "standing barrage" to protect the right flank of the 327th Infantry. On 9 October, the 320th again joined the 321st in firing a rolling barrage for the 327th and
328th Infantries of the 164th Infantry Brigade. After receiving new orders on 10 October, the regiment spent the night of 10–11 October occupying new positions in the ravine west of Exermont. Assigned to support the 164th Infantry Brigade, the regiment assigned one battalion to each of the brigade's two regiments as accompanying artillery. The 1/320th occupied near Fleville, but poor visibility inhibited the identification of targets. Little movement occurred through 13 October, although on the afternoon of 13 October, the regiment fired a defensive barrage to repulse a German counterattack. During the afternoon and evening, 2/320th moved forward to positions south of Sommerance, although Battery E was delayed by the counterattack. The regiment continued to fire harassing fire through the night. On 14 October, the regiment participated in a rolling barrage in support of a general First Army attack on the Kriemhilde Stellung, and at about 1600 hours fired a 30-minute defensive barrage along the Ravin aux Pierres. During this attack, a forward gun under 2nd Lieutenant Edward Gunter destroyed two pillboxes. And on the afternoon of 14 October, 1/320 moved forward to the ravine between Fleville and Sommerance. From midnight on 14–15 October, the regiment fired preparation fires for another attack against the Kriemhilde Stellung, and then transitioned to a rolling barrage at 0725 to support the infantry's attack at 0730 hours. On 16 October, the regiment continued to deliver preparation and rolling barrage, and the fired against a German counterattack at 1100 hours. In the afternoon, a German plan was downed by machine gun fire, with credit claimed by Battery C, 320th, as well as the batteries of 2/321st Field Artillery. On 17 October, Lieutenant Durrett was killed by German shell fire. After a lull in the fighting, the 1/320th was withdrawn to rearward positions on the night of 21–22 October, and conditions settled into "stabilized warfare" until 1 November, with light harassing schedules at night, and close liaison maintained with the infantry for on-call missions. From 26 to 31 October, the regiment moved a gun from each battery forward to conduct adjustments in preparation for a new offensive, scheduled for 1 November. The rest of the batteries moved forward on the night of 30–31 October. participated in a three-stage preparation from 0330 hours. During the night of 1–2 November, the 320th (and the other battalions of the 157th Brigade) moved forward into a between the 319th and 320th Infantries, and suffered heavy artillery and machine gun fire while covering the gap with their battery anti-aircraft machine guns. On the morning of 2 November, the attack resumed at 0800 hours, and the 321st moved forward and established a regimental command post in the town of Imecourt. Due to poor roads which limited the availability of ammunition resupply, the 320th remained stationary to allow resupply to the 321st. On 3 November, the regiment moved to positions north of Sivry-lez-Buzancy. While moving forward again on 4 November, the Regimental Commander ordered 1st Battalion into action at about 1100 hours against machine gun positions that were delaying the infantry advance. At 1500 hours, the 2nd Battalion also emplaced, and at 1600 hours, the entire regiment delivered a rolling barrage in support of the 318th Infantry, delivering 2600 rounds during 80 minutes of firing. On the morning of 5 November, the 320th relieved the 321st and moved forward with both battalions in close support of the infantry. At 1100 hours, 2/320th occupied southwest of Beaumont and fired at machine gun positions near La Thibaudine Ferme and La Harnot Erie Ferme in support of the 317th Infantry, and later in the afternoon, Battery B occupied south of the Stonne-Beaumont Road and fired on the village of Yoncq. After nightfall, the regiment fired another 500 rounds at Yoncq. This was the last "considerable firing" done by the regiment before moving to Sivry-Imecourt-St. Juvin (8-9 November), Monblainvill-Apremont (10 November) and Les Islettes, where it received news of the armistice on 11 November. The entire 157th Brigade remained near Les Islettes until 18 November, and then moved to Ste. Menehould before rejoining the 82nd Division in the Tenth Training area.
Interwar period The 320th Field Artillery arrived at the port of New York on 7 May 1919 on the troopship
USS Kentuckian and was demobilized on 12 May 1919 at
Camp Dix,
New Jersey. Pursuant to the
National Defense Act of 1920, it was reconstituted in the
Organized Reserve on 24 June 1921, assigned to the 82nd Division, and allotted to the Fourth
Corps Area. The regiment was initiated on 7 December 1921 with regimental headquarters at
Columbia,
South Carolina. Subordinate battalion headquarters were concurrently organized as follows: 1st Battalion at
Greenville, South Carolina, and 2nd Battalion at
Sumter, South Carolina. The regimental headquarters was relocated on 8 July 1927 to
Spartanburg, South Carolina. The regiment conducted annual summer training with the 2nd Battalion,
16th Field Artillery Regiment at
Fort Bragg,
North Carolina, and also conducted
Citizens' Military Training Camps at Fort Bragg some years as an alternate form of summer training. The primary
ROTC "feeder" school for new Reserve lieutenants for the regiment was
The Citadel in
Charleston, South Carolina.
World War II On 25 March 1942, the 320th Field Artillery was ordered into active military service with the rest of the 82nd Division. On 15 August 1942, the 320th was converted to a glider field artillery battalion (GFAB) when the 82nd converted to an airborne division. After training in the United States at Camp Claiborne, Louisiana, and Fort Bragg, North Carolina, the battalion departed the New York Port of Embarkation in late April 1943. Arriving in Casablanca, French Morocco in early May, the 320th staged with the
325th Glider Infantry Regiment (GIR) Combat Team at Marnia, Algieria, under the command of Lieutenant Colonel Paul Wright. The 320th remained with the 325th in reserve near Kairouan, Tunisia, during the fighting in Sicily.
Cold War to present As part of the implementation of the
pentomic organization, the 320th Artillery was reorganized as a parent regiment under the
Combat Arms Regimental System (CARS) on 22 March 1957. The regiment was redesignated as the 320th
Field Artillery in 1971, reorganized under the
U.S. Army Regimental System (ARS) in 1986, and redesignated as the 320th Field Artillery
Regiment in 2005. Under the CARS and ARS, elements of the regiment have continued to serve with various units.
Battery A, 320th Artillery served briefly as a battery in the 11th Airborne Division from 1957 to 1958 before inactivating. As 1st Battalion, 320th Artillery (
Field Artillery after 1971), it served as a direct support battalion in the
82nd Airborne Division Artillery from 1962 to 1986, and was then reassigned to the 101st Airborne Division. In 2004, the battalion was assigned to the
2nd Brigade Combat Team, 101st Airborne Division.
Battery B, 320th Artillery also served with the 11th Airborne Division from 1957 to 1958. Redesignated as 2nd Battalion, 320th Artillery (
Field Artillery after 1971), the battalion served with the
101st Airborne Division Artillery from 1962 to 2004, when it was reassigned to the
1st Brigade Combat Team, 101st Airborne Division. The battalion inactivated in 2015.
Battery C, 320th Artillery served with the 11th Airborne Division from 1957 to 1958, and with the 82nd Airborne Division from 1962 to 1964. Redesignated as 3rd Battalion, 320th Artillery, it again served briefly with the 82nd Airborne again from 1968 to 1969. Activated again in 1986, 3rd Battalion, 320th Field Artillery returned to the 101st Airborne Division Artillery until 2004, when it was reassigned to the
3rd Brigade Combat Team, 101st Airborne Division. Battery D, 320th Artillery served in the 82nd Airborne Division from 1957 to 1964. Redesignated as Battery D, 320th Field Artillery, the battery served with the
193rd Infantry Brigade from 1986 to 1994. Reorganized and redesignated as
4th Battalion, 320th Field Artillery Regiment, the battalion served with the
4th Brigade Combat Team, 101st Airborne Division from 2004 to 2013. Battery E, 320th Artillery also served in the 82nd Airborne Division from 1957 to 1964. Redesignated as Battery E, 320th Field Artillery, the battery served with the
Berlin Brigade from 1986 to 1994.
Further Operational Service by Regimental Elements The
1-320th deployed to Dominican Republic in 1965 during
Operation Power Pack, and to Grenada in 1983 during
Operation Urgent Fury with the 82nd Airborne Division. The battalion participated in
Operations Desert Shield and Storm in 1990–1, and has deployed six times during the Global War on Terror: to Iraq from 2003 to 2004, 2005–6, and 2007–8; and to Afghanistan from 2010 to 2011, in 2012, and in 2014. The
2-320th deployed to Vietnam with the 101st Airborne Division from 1965 to 1972, to
Operations Desert Shield and Storm in 1990–1, and multiple deployments in the Global War on Terror. The
3-320th deployed to
Operations Desert Shield and Storm in 1990–1, and multiple deployments in the Global War on Terror. The
4-320th participated in
Operation Just Cause in 1990 as Battery D, 320th Field Artillery. It also deployed four times during the Global War on Terror, to Iraq from 2005 to 2006, and to Afghanistan from 2008 to 2009, 2010–11, and in 2013. ==Lineage==