9th (White's) Infantry Regiment [also called 3rd Regiment] was organized in October, 1862, with men who had served in the Missouri State Guard. It was assigned to A. E. Steen's and Parson's Brigade, Trans-Mississippi Department, and took an active part in the conflict at Helena. Here the unit lost 7 killed and 53 wounded and after the fight reported 168 fit for duty. During the winter of 1863-1864 it was redesignated the l2th Missouri Infantry Regiment. The field officers were Colonel James D. White, Lieutenant Colonel Willis M. Ponder, and Majors Benjamin Holmes and Thomas B. Sandford.