Leonidas S. Thompson, Private, Capt. Thompson’s Company of Cavalry, Alabama Volunteers,* enlisted April 20, 1862 at Montgomery by Capt, H. B. Thompson for 3 years, sent to hospital at Tunnel Hill, Ga. by Surgeon, September 28, 1863, transferred to Company B, Waddell’s Artillery Battalion March 29, 1864, no further records

* This company subsequently became Company B, 51st Regiment Alabama (Partisan Rangers)

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Henry B. Thompson, Capt., Thompson’s Company of Cavalry, Alabama Volunteers,* enlisted April 20, 1862 at Montgomery by Capt, H. B. Thompson for 3 years, appointed Captain July 19, 1862, appointed Major September 27, 1862, resigned April 23, 1863 by reason of disability, disease of the spine

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L. S. Thompson, Private, Company B, 20th Battalion Alabama Light Artillery enlisted April 1, 1864 at Dalton by Capt. Bellamy for the war [March 21, 1862 at Montgomery] receipted for an issue of clothing June 24, 1864, no further records

Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Alabama

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Waddell's Battery was organized in February, 1862, by taking six men from each company of the 6th Alabama Infantry Regiment. During the siege of Vicksburg it was captured on July 4, 1863. After the exchange its members were assigned to the 20th Alabama Artillery Battalion

https://www.familysearch.org/wiki/en/20th_Battalion,_Alabama_Light_Artillery