The Missouri 10th Infantry Regiment (also called 12th Regiment) "Steen's Infantry", "Pickett's Infantry", or "Moore's Infantry", was organized on November 10, 1862. Some of its members were raised in the counties of Chariton, Crawford, and Howard. The unit was assigned to A. E. Steen's, Brigadier General Mosby M. Parson's, and S. P. Burns' Brigade, Trans-Mississippi Department.The 10th saw action in Arkansas and Missouri. It lost 11 killed, 41 wounded, and 237 missing at Helena, and after the fight it mustered 236 men. The regiment sustained 34 casualties at Pleasant Hill and 10 at Jenkins' Ferry. During the spring of 1865 it disbanded.
The regiment fought at the Battle of Prairie Grove, where both the regiment's colonel and lieutenant colonel were killed and again at the Battle of Helena on July 4, 1863, where it suffered heavy casualties.
Beginning in late 1863, the 12th Missouri Infantry Regiment was attached to the regiment; the men of the 12th Missouri Infantry were officially merged into the regiment in late 1864. The regiment fought at the battles of Pleasant Hill and Jenkins' Ferry in April. On June 8, 1865, the men of the regiment were paroled and sent back to Missouri.
Companies
Company A - Captain George W. McCristy, Captain R.B. Overton. Also called 1st Regiment. Became Company A, 10th Consolidated Regiment, Missouri Infantry. Composed of men from the companies of John W. Priest and John H. Winston's Regiments, Missouri State Guard. Subsequently became Company A, 10th Consolidate Regiment, Missouri Infantry.
Company B - Captain John G. Musgrove, Captain Charles H. Burch. Composed of men from the companies of John W. Priest and John H. Winston's Regiments, Missouri State Guard. Subsequently became Company B.
Company C - Captain Benjamin Holt, Captain Robert F. Boals. This company was organized from companies of W. O. Coleman's Regiment, Missouri Cavalry.
Company D - Captain John W. Lenox, Captain Elias D. Wright - mustered Orgon County, Missouri. This company was organized from companies of W. O. Coleman's Regiment, Missouri Cavalry.
Company E - Captain John M. Johnson, Captain Campbell Greenup, Captain Benjamin Holt, Captain Alexander Trammell. This company was organized September 19, 1862 from the regiments of companies consolidated by Colonel Johnston and placed under command of Major A. C. Pickett.
Company F - Captain Isaac D. Wilson, Captain A.C. Hancock, Captain John C. McKinney, Captain R.B., Overton. Paroled as Company M, Shaver's (38th) Regiment, Arkansas Infantry. Their names do not show on the roster of the 38th Arkansas, nor are their service records found there.
Company G - Captain Moses J. Bradford, Captain James B. McGhee. Parole rolls show Company G. was consolidated with Company K, Tenth Consolidate Regiment, Missouri Infantry.
Company H - Captain Jacob A. Love.
Company I - Captain D. F. M. Sigler, Captain John McDaniel.
Company K - Captain John Still, Captain Henry Brockman - mustered Arkansas. Parole rolls show Company G. was consolidated with Company K, Tenth Consolidated Regiment, Missouri Infantry.
