No unit designation/Field & Staff
3rd Cavalry Regiment was organized during the summer of 1862 with men from Springfield and Newtonia, and Polk County. Many of its members had seen prior service in the Missouri State Guard. It served in Shelby's, C. Green's, and J. B. Clark's Brigade, Trans-Mississippi Department. The unit fought in Marmaduke's Expedition into Missouri, participated in numerous conflicts in Arkansas, and was a part of Price's Missouri operations. It reported 26 casualties with Marmaduke, 9 at Helena, and 4 at Bayou Fourche. The regiment lost 2 killed and 5 wounded at Poison Spring, 6 killed and 31 wounded at Jenkins' Ferry, and 19 killed and 110 wounded during Price's Expedition. In the spring of 1865 it disbanded. The field officers were Colonel Colton Green, Lieutenant Colonels L. A. Campbell and L. C. Campbell, and Major James Surridge.