The 13th Arkansas was formally organized on 29 Jul 1861 at Camp Ground in Greene Co, Arkansas with about 1000 men. The companies (less Co. K) mustered into Confederate service at Harrisburg, Arkansas, on July 23, 1861. Company K, the "Erin Guards," was from St. Louis, Missouri; the rest of the companies were from northeast Arkansas.(Howterton, Bryan, "Re: LH Tennison & HF Tennison 13th Arkansas Infant" , Arkansas in the Civil War Message Board, Posted, 28 November 2010, 9:37 pm Accessed 8 August 2011, http://history-sites.com/cgi-bin/bbs53x/arcwmb/webbbs_config.pl?noframes;read=22842) Col. A. D. Grayson was the the mustering officer. The original muster-in rolls were lost when the regiment's camp at Belmont, Missouri, was overrun by the enemy on November 7, 1861. The first available muster rolls are from the regimental reorganization in April 1862, which means there is a gap of nine months. As a result, the names of several hundred of the original members of the regiment are lost to history. In addition, when the regiment was reorganized for the war on April 29, 1862, the companies were redesignated, e.g., original Company K became new Company A, etc. (Howterton, Bryan, "Re: LH Tennison & HF Tennison 13th Arkansas Infant" , Arkansas in the Civil War Message Board, Posted, 28 November 2010, 9:37 pm Accessed 8 August 2011, http://history-sites.com/cgi-bin/bbs53x/arcwmb/webbbs_config.pl?noframes;read=22842) The company commanders following the battle of Shiloh were:(Sharpy, Sandy, "THIRTEENTH ARKANSAS INFANTRY REGIMENT", Article from the Memphis Daily Appeal, Tennessee State Library and Archives, Roll No. Jan 1, 1862 - June 9, 1862 , Book Aprl. 12, Page 2 Col. 2, Edward G. Gerdes Civil War Page, Accessed 8 August 2011, http://www.couchgenweb.com/civilwar/13caslst.htm)
:*Company A - the "Tappan Guards" Capt R. B. Lambert, orgionally organized as a volunteer militia company under the 12th Militia Regiment of Phillips County on May 23, 1861, under the command of Captain James C. Tappan. (Arkansas Military Department Records, Spanish American War, List of Commissioned Officers of the Militia 1827–1862, Arkansas History Commission, Microfilm Roll 38-8)
:*Company B - the "Richland Rangers", orgionally organized as a volunteer militia company in the 19th Militia Regiment(Arkansas Military Department Records, List of Commissioned Officers in State Militia 1827–1862, Microfilm Roll 00000038-8, Page 280) of St. Francis County, Arkansas, enlisted August 1, 1861, at Madison, Arkansas, under the command of Capt. John C. Johnson, Capt J. R. Shelton suceeded Johnson in command.(Morgan, James Logan, "THE RICHLAND RANGERS: COMPANY D, of the l3th ARKANSAS INFANTRY REGIMENT", Woodruff County Historical Society, Accessed 8 August 2011, http://www.couchgenweb.com/civilwar/richnote.htm)
:*Company C - CPT B. Harris, by the time of the Battle of Shiloh, 1st Lt J. H. Hall had assumed command.
:*Company D - Capt. Balfour
:*Company E - 2nd Lt Allen Dodd
:*Company F - Capt Thomas Wilds
:*Company G - Capt H. W. Murphy
:*Company H - Capt B. C. Crump
:*Company I - Capt J. M. Pollard
:*Company K - the "Erin Guards," of St. Louis, Missouri, under the command of Capt G. B. Hunt.(Howterton, Bryan, "Re: LH Tennison & HF Tennison 13th Arkansas Infant" , Arkansas in the Civil War Message Board, Posted, 28 November 2010, 9:37 pm Accessed 8 August 2011, http://history-sites.com/cgi-bin/bbs53x/arcwmb/webbbs_config.pl?noframes;read=22842)
Its members were recruited in Phillips, Arkansas, and Monroe counties. The field officers were Colonels L. Featherston, James A. McNeely, John E. Murry, and James C. Tappan; Lieutenant Colonels A.R. Brown, R. A. Duncan, A. D. Grayson, and Peter V. Green; and Majors E. A. Howell and George B. Hunt.(http://www.civilwar.nps.gov/cwss/regiments.cfm National Park Service, Civil War Soldiers and Sailors System], Confederate Arkansas Troops, 13th Regiment, Arkansas Infantry, Accessed 27 January 2011)