No company designations/Field & Staff
9th (Clark's) Infantry Regiment [also called 2nd Regiment] was organized in November, 1862, by consolidating the 8th Infantry Battalion and the Missouri companies of Clarkson's Missouri Cavalry Battalion. The two Arkansas companies of this regiment seceded and merged into Buster's Arkansas Cavalry Battalion. The unit served in D. M. Frost's, J. B. Clark's, and C. S. Mitchell's Brigade, Trans-Mississippi Department. It fought at Prairie Grove, lost 4 killed and 108 wounded at Pleasant Hill, and sustained 52 casualties at Jenkins' Ferry. The regiment disbanded in the spring of 1865. Its commanders were John B. Clark, Jr.; Lieutenant Colonels M. W. Buster and Richard H. Musser; and Majors Richard Gaines, Harry H. Hughes, and J. Quin Morton.