1. Pennington, R., Confederate Cavalry, Terry's Regiment, Texas Cavalry

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2. Pennington, Riggs, Confederate Cavalry, 12th Regiment, Texas Cavalry (Parson's Mounted Volunteers)

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3. Pennington, Riggs, Confederate Infantry, 10th Regiment, Texas Infantry (Nelson's)

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There is a list of soldiers (roster) at http://www.itd.nps.gov/cwss/soldiers.cfm for each of these units.