During the Battle of Shiloh, a.k.a, Pittsburg Landing, Tennessee, Sunday, April 6, 1862 – Monday, April 7, 1862, the battery, armed with two 6-pounder smoothbores and two 12-pounder howitzers was assigned with the rest of Shoup's battalion to General Patrick Cleburne's 2nd Brigade of Major General William J. Hardee Corps. Major Shoup was serving and Major Genral Hardee's Chief of Artillery.[12] By the afternoon of Sunday, April 6, 1862, men of Brig. Gens. Benjamin M. Prentiss's and W. H. L. Wallace's Union divisions had established and held a position nicknamed the Hornet's Nest.[13] The Confederates assaulted the position for several hours rather than simply bypassing it, and they suffered heavy casualties during these assaults.[14] The Confederates, led by Brig. Gen. Daniel Ruggles, assembled a 'grand battery' of over 50 cannons, including Trigg's Arkansas Battery[15] into a position known as "Ruggles’ Battery".[16] Some controversy exists as to who exactly gave the order to concentrate artillery at this point. It has gone down in history as “Ruggle’s Battery” but Major Shoup also claimed the credit. Other sources indicate that Brig. Genl. James Trudeau began the concentration after orders from Beauregard. National Park Service tablets at the Shiloh National Military Park use the “Ruggle’s Battery” designation. This concentration originated about 3:00 pm when General Beauregard was informed of the death of General Albert S Johnston thereby making Beauregard the army commander. He immediately moved to push the stalled rebel attack by assigning General Braxton Bragg to command in the eastern sector of the battlefield and General Ruggles to command in the center of the battlefield, the Duncan field sector. Ruggles issued orders to gather the artillery into a group which historians now believe totaled 55 guns. Major Francis Shoup also claims a portion of the credit for this grouping which came about because Shoup and Ruggles were unaware of the other being present. There were actually two groups of guns in Ruggle's Grand Battery, the northern group and the southern group. The northern group contained the batteries located by aides of General Ruggles and brought to the field. This group is the group formed by Ruggles. The southern group was commanded by Major Shoup and contained a group of batteries who had been under Shoup"s supervision and had been resting following the morning fight near the main Corinth Road. The northern group, commanded by Captain Bankhead included a section of Ketchum's Alabama battery 2 guns, Hodgson's Lousiana battery 6 guns, Bankhead's Tennessee battery 6 guns, Stanford's Mississippi battery 6 guns, Robertson's Alabama battery, 4 guns for a total of 30 guns. The southern group of guns, commanded by Major Shoup included Roberts Arkansas battery 4 guns, Triggs Arkansas battery 4 guns, Sweet's Mississippi battery 6 guns, a section of Hubbard's Arkansas battery (Lt Thrall commanding) 2 guns, Brynes Kentucky battery, 7 guns and a section of Cobb's Kentucky Battery, 2 guns, for a total of 25 guns. The guns of these two groups came from differant areas of the battlefield. It appears that that Shoup was not initially aware of the presence of the northern group of guns or Ruggles' orders to gather the guns. The resulting artillery concentration of 55 guns was, up to that time, the largest concentration of artillery ever on the north american continent and was its self a historical event. This status did not last long as it was quickly surpassed by even larger artillery concentrations in the Eastern Theater of the war. The grand battery enabled Confederates to surround the position, and the Hornet's Nest fell after holding out for seven hours.[17]