Allen L. Barnett, Private, Company K, 11th Alabama Infantry, enlisted March 18, 1862 in Perry County, Alabama by Lt. B. L. N. Innis for the duration of the war, paid bounty, receipted for an issue of clothing during the 2nd quarter, 1864, admitted General Hospital, Howard's Grove, Richmond, Virginia July 19, 1864, furloughed for ?? days July 28, 1864, recorded on his companies Sep & Oct, 1864 muster roll as having "died of disease Sep 2, 1864," no further records
[Note: I'd suspect he most likely died at home, never returning to duty from his sick furlough]
M311: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Alabama
11th Regiment, Alabama Infantry
11th Infantry Regiment was formed at Lynchburg, Virginia, in June, 1861, and totalled 972 men. They were from Marengo, Greene, Bibb, Washington, Perry, Clarke, Fayette, Pickens, and Tuscaloosa counties. The unit was assigned to General Wilcox's, Perrin's, Sanders', and W.H. Forney's Brigade, and served in many battles with the Army of Northern Virginia. It was active from Seven Pines to Cold Harbor, took its place in the Petersburg trenches, then saw action in the Appomattox Campaign. The regiment contained 656 effectives in April, 1862, and reported 9 killed and 49 wounded at Seven Pines and 338 casualties during the Seven Days' Battles. It had 39 men disabled in the Maryland Campaign, 8 at Fredericksburg, 82 at Chancellorsville, and 75 at Gettysburg. There were 14 officers and 176 men at the surrender on April 9, 1865. Its commanders were colonels Sydenham Moore, John C.C. Sanders, and George E. Tayloe; Lieutenant Colonel S.F. Hale; and Majors George Field, Richard J. Fletcher, and Archibald Gracie, Jr. http://www.itd.nps.gov/cwss/regiments.cfm
See also: http://www.archives.alabama.gov/referenc/alamilor/11thinf.html
http://www.archives.alabama.gov/referenc/flags/028.html
http://www.civilwarhome.com/11alainf.htm
http://ehistory.osu.edu/USCW/features/regimental/alabama/confederate/wilcox.cfm#11th-Inf