* Erwin's Battalion was also known as the 5th Battalion Missouri Infantry,and as the 3rd Battalion Missouri Infantry, and was broken up in August,1862, at which time this company became Company E, 6th Regiment Missouri Infantry
Zachariah G. Cooper, 46 year old Farmer, born in Nelson County, Kentucky, resident of Jackson County, Missouri, Private, Company E, 6th Regiment Missouri Infantry**, enlisted January 1, 1862 at Springfield, Missouri by T. H. Rosser for one year, detailed in Quartermaster Department as Blacksmith December 10, 1862, discharged at Grand Gulf, Mississippi as being over Conscript age, March 28, 1863, previously served in Missouri State Guard as Private in Company I, Roser's Battalion, Infantry, 8th Division, participated in engagements at: Lexington, Elkhorn & Iuka, no further records
** This company formerly served as Company A, 3rd Battalion Missouri Cavalry; it became Company E, 6th Regiment Missouri Infantry, about August 23, 1862
M322: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Missouri